[imsly2]

Hey guys,

First off I want to thank you all for still helping people out on these old machines! Having an active forum made me feel a lot better about buying a project of this magnitude. ZZZZ, sportybob, Brian L, and Marty you guys have already helped me out so much it's unbelievable. I've read all the way through Brians first thread probably about 5 times now.

I do have a question that I want to ask, I think I may have actually made a bad mistake, but I feel the need to write a little about my experience buying and moving the mill first for anyone interested in reading about it and maybe for me to refer back to later. If you're not interested you can skip down to the bottom where I'll ask my question.

[blog]
Okay, so I've been looking for a CNC Mill now for about the last 2 years. I knew a while ago the Partner 1 was one of the top machines on my list considering my low $5,000 budget and all the features I was looking for. It needed to fit in my garage, so I was looking for a light weight machine with as much travel as possible in a relatively small footprint, Running on single phase power was going to be a huge plus, and I also wanted a tool changer. Obviously, considering my budget the thing couldn't be very far away either, because paying for rigging and transporting a mill is just outrageous. And I knew going into this I was probably going to be buying a project in need of some service or repair.

Finally, after years of relentless eBay and Craigslist searching, this Milltronics Partner 1 popped up that met pretty much everyone one of those requirements.
Milltronics Mill | eBay

I'm located in Memphis, TN and this was just outside Tulsa, OK. Only 6 and 1/2 hours away Google told me, which was a stones throw away considering all the other places I was more frequently seeing CNC mills sell from like Chicago and Ohio. And equally as important, he had a forklift there and was willing to load the machine on a trailer for free! All that was left was seeing if my dad was up for a road trip seeing as how he's the one with a truck and trailer. And of course the fun question as to how I was going to get the thing off the trailer and stuffed in my garage..

Well, it turns out that trailer wasn't exactly road worthy at the time, so I did have to do some work to it first which included hammering out a fender and replacing a couple blown tires along with running some wire for the lights. But after that, We basically drove there, he loaded the machine on the trailer with a forklift and we chained it down and headed back. I was obviously taking some big risks here that I may still live to regret, the machine was not under power, so I wasn't able to see anything run or see exactly what the issue was with the x axis that he described in the eBay auction. I also did not remove the controller or front panel. Which I've heard is a bit dicey and some people have had some bad experiences from not doing so. I just kept thinking to myself that whatever was wrong with it, I'd still probably be able to fix it, right? I mean, I knew I was going to have to work on it in the first place anyway, so what was a couple more problems to trouble shoot I guess? Oh, And we actually ending up driving through a rain storm on the way back too. (we stopped and rapped the machine up with a tarp)


Okay, so finally after a straight there and back marathon of a trip the machine was sitting outside my house on a trailer. I figured it was downhill from there. All my problems always seem easier to solve when their right there in front of me. And now I even had a little time to sit back and think as well.
Attachment 190236

The first obstacle to overcome was making sure the thing could fit through the garage door. It was about 6" or so too tall the way it was sitting, because before unplugging the machine, I guess someone thought it would be a good idea to jog the Z axis all the way up first. I figured if all else failed I would be able to just manually turn the lead screw and lower it down, but I wanted to see if I could get the machine to do the turning for me. I thought if I could back the trailer up to my garage close enough that I might be able to get my welding extension cord out to it and try to fire the thing up. Which is were my first forum trouble shooting session came into play.
Attachment 190238

I really still had no idea if I could even power the thing with single phase or If I was going to have to buy/make a phase converter first. The machines serial plate had a pretty easy to read 3 phase right there on it, but I had seen some of you say they would run on single phase power. Turns out you guys were right, I put my 220 single phase into the no. 1 and 3 slot on the terminal, covered my eyes, flipped the switch, and the machine powered up and nothing starting smoking!! The computer monitor was blank, but I was still pretty sure I hadn't blown anything up. So began the computer/controller trouble shooting.

I took the side of the computer off to see what I was working with. I've been working with and building computers for a while now but it was still somehow very foreign to me. I guess I just didn't start long enough ago to be familiar with such a retro machine. But I inspected it just the same, everything looked like it was still in its place well enough, but I pulled the cards out and reseated them anyway. Then I flipped it back on to see if it made any difference. I was already thinking about how I wanted to put a computer power switch on the thing. It's a bit too dramatic for me while trouble shooting a computer problem to have to switch on that loud breaker and having all the machine fans kick on, then having to run around to the other side of the machine to see if what I did made any difference. After a couple of attempts of fiddling with the cards and wires I got a video signal. I felt a bit relieved but knew I wasn't in the clear yet.

So I had a video signal, but the computer was screaming about losing it's cmos settings. I went back and started to hunt for a battery finding that someone had apparently removed the original battery, and poorly soldered on an extension which had broken off. So, I figured fine, I'll just clear the cmos error for now just to get the Z axis jogged down. At this point I started to feel a bit paralyzed though because I couldn't navigate through the bios without any arrow keys!! I thought about just plugging in a keyboard, but I didn't even know what the keyboard connector on the motherboard was even called, let alone actually have any keyboards that old. I immediately went inside to research and ordered a couple AT to PS2 adapters so I would be able to plug in a keyboard later.

After getting past the cmos error I got another error about some drive failures as well. It turns out my machine had a simdisk and the battery was dead on the thing. I read enough on this forum to be able to go through the simdisk setup and formatting which finally allowed me to get to the controller software!! I was stumped again however because it wouldn't let me jog anything without homing out the machine and It couldn't complete the homing sequence, because it looked like either the x or y axis was a little confused. I was able to find help again through the forum and by using ZZZZ's access level home here trick I was able to successfully to jog the Z axis down!! One big problem solved, and I was definitely relieved to be able to get into the controller software and jog all the axes around a little.

The next big issue was obviously getting the machine moved into the garage. A couple rigging companies wanted over $1,000 just to move the machine from my driveway into the garage. That wasn't happening. To rent a forklift it was going to cost about $400, which to me was a worse case scenario. The most fun approach I could think of was seeing if I could unload the machine without a forklift!! I mean, if the Egyptians could build the pyramids without any equipment, surely I could unload a machine from a trailer without a forklift right? It wouldn't hurt that it would also be saving me some money.. And besides, I had an idea brewing in my head that I was sure could work! Basically I wanted to anchor the mill to something and pull the trailer out from underneath it. I knew there was also the issue of moving it around once I got it off the trailer, so I wanted it as close to the garage as possible when I pulled the trailer out. I jacked the mill up and built a 4x4 sled underneath it to help it side off and also to give me something to put some pipe under once it was on the ground so I could roll it up the driveway and into the garage.

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Then I pulled my jeep up next to the back of the trailer and as close to the garage door as I could get to use it as the anchor. I wrapped a tow strap around the machine and chained it to the Jeep.

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Then slowly started to pull the trailer out from underneath the machine, I used some soap and water to help it slide a little because at first I was just pulling my jeep sideways.

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Once the machine was nearing the end of the trailer I attached the ramps to it and continued pulling the trailer out. The machine went down the rams smooth and even all the way to the ground!!

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My drive way is definitely not smooth, it's a very bumpy washed finish. It's also at a pretty good incline. Trying to push the machine by hand up the drive way just wasn't happening. I had an idea to use the trailer to push it instead! But even then, pushing the machine on the sled was too much friction, The back of the trailer started to raise up before the machine was even thinking about moving. The next step was to put the 1/2 pipe under the sled so it could roll up the drive way, but again, being so bumpy, the pipe wouldn't roll... Then I had the idea of placing some cedar planks down for the 1/2 pipe to roll on, and finally things started moving!!

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Once the Machine was in the garage, (sorry about all the junk) I needed to rotate it 90° because my goal was to put it all the way at the back of the garage facing the door. My dad had the wonderful idea of just pushing on one side of the sled to turn it.

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Once we pushed it enough on that one side, we were able to push it on the opposite side to turn it the full 90°! There was still some work to be done however, It needed to go further back obviously, but first it wasn't quite centered where I wanted it, and even though the floor was smoother than the drive way, I still couldn't push the machine by hand on the pipes. I was however, able to use my high lift jack and some 4x4's put it up against wall of the garage to center the machine just where I wanted it. Then it was just a matter of using the trailer once again and pushing it the rest of the way back. I wanted it as close to the back wall as possible to save room, but I knew I would also need access to the computer and electronics which has a panel door on it that has to swing out about 3ft. And there was no other way to remove to door either!! It literally had a full length piano hinge welded on both the door and the control panel, no hardware, spot welded at about 5 different locations and welded across the top and bottom of the hinge as well. That would have just been a ridiculous waste of space for such a silly thing. So I drilled out the spot welds and ground the welds off the top and bottom and popped the hinge off the controller. I imagine it won't be too difficult to put a couple cam latches on that side to hold the door on with. Then we were able to push the machine all the way back and leave me just enough space to get to the electronics and put the chip pan in place.

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Pretty much for the last week I've been waiting on some parts and working on the computer side of things. I pulled the computer or card cage out and I've been working on it here and there at my computer table. I repaired and replaced the CMOS battery on the motherboard. The battery on the simdisk was dead as well, so it would loose it's parameters and files every time you powered down the computer. That coupled with the fact that the ram disk itself was very small in size I decided to replace it with a larger drive.

Right now I've swapped in a regular hard drive, but I ordered a 4gb flash disk on model to replace that with as well.
Transcend 4GB IDE Vertical SLC Flash Disk on Module Dom 40 Pin SSD TS4GDOM40V S | eBay ($42.06)

Attachment 190278

I had some more fun obstacles to overcome getting the files off the ramdisk, I had no luck just sticking the hard drive in there and copying the files from the ram disk onto the hard drive. Nope, I had to use Floppies Discs!! Which I actually didn't have any of, and I ended up having to order some because apparently nobody sells them in stores anymore.

Basically I was able to copy everything off the ramdisk onto one floppy disk. Then I removed the ram disk and installed the hard drive. Getting a hard drive to work on the motherboard was fun too, I have actually never had to specify hard drive geometry before and the motherboard apparently has a limit of 8GB as well which made things a little interesting. After the hard drive was recognized I was able to install dos 6.22 and copy the files I backed up from the ramdisk onto the new hard drive. This forum was invaluable at pointing me in the right direction with the path.dat file and editing the autoexec.bat and config.sys files as well. I even put a menu in the autoexec.bat file so I can chose to bypass the controller software and go into dos instead, because I couldn't find a way to exit the controller software and get back to dos without powering down and sticking a dos start up disk in the machine.

My next step is to replace the motherboard with something a bit newer. I'm convinced I can fit an ATX size board in there if I chop down the standoffs for the I/O panel board. The last part for my new board came in today. It's a ATX slot1 Motherboard with a PII 300MHz and 768MB of SDRAM. AGP video card slot, 4 PCI slots, and 3 ISA slots. 2 PS2, USB, and COMM ports, 2 IDE headers and all on the board!! It's amazing the things you take for granted until its gone one day and your staring at a 486 motherboard and no onboard features except the ISA slots and 1 AT keyboard port..

Motherboard: Elpina Slot One Motherboard AGP 4 PCI 3 ISA ATX Form Factor | eBay ($19.35)
Memory: 1GB Set 512MBX2 168 Pin PC133 CL3 Non ECC Unbuffered SDRAM for Dekstop Tower | eBay ($10.99) (Motherboard Max is 768MB)
Processor: Intel Pentium II SL2U7 Slot 1 450 MHz Processor MMX w Passive Heatsink | eBay ($1.04) (motherboard downclocked it to 300MHz)

I've already got some old AGP video cards, and I have a few PCI network cards as well. So I'm looking at about $73.44 total for the new system. Definitely the most expensive door stop I've ever built. But Running in DOS and needing 3 full length ISA slots really narrows down your options.
[/blog]

Begin Question Here:

I guess that pretty much wraps up my experience so far, Today I starting working on the machine itself. Cleaning it up and greasing things. Which leads me into my question and the part that I may have messed up. The manual calls for Mobile 1 synthetic Universal grease or equivalent. I had some Valvoline SYD Power Synthetic grease in my grease gun and without really researching or putting much thought in to it, i started going through and greasing the zerk fittings on the linear cage blocks. working with 4x4's I'm use to just pumping the handle until i see grease start to come out of something. So I was pretty much pumping until I started to see some grease coming out around the wiper near the zerk fitting. I had already done all 4 Z bearings when suddenly it hit me that maybe I'm screwing something up. I started reading and I've been seeing all sorts of things about different weights of grease and specific amounts that you are suppose to put in some of the THK bearings.

What do you guys put in your bearings? How much do you insert? And have you ever experienced or seen bearings like this fail due to too much or too thick of grease? How bad Have I messed up here?

And back to the computer upgrade, Does anyone know if the Centurion 6 software will run with the acroloop cards? Or does it have to have the new SBC to work? I'm unsure if its the acroloop cards or the slower processor or both that makes them have to upgrade the motherboards on these systems. So basically, If I upgrade the computer, is it possible to then run the newer software on the older acroloops cards?

[imsly2]

Phew! My first post is back now, Yay.

I guess I should have specified some more information.

The Machine partner model is PI Series G.
The Controller is a Cent. 5 with a 4-digit-B Serial Number

Here are a couple pictures of the rails for whatever its worth.

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[rl49]

Welcome imsly2,

I have a 1E I am rewiring the axis , did you get all the manuals with your machine? What brand spindle inverter does it have?

Ron

[imsly2]

I didn't get any manuals at all with my machine. Luckily there was a floppy disc hidden in the back with the Parameters though.

But I was able to dig up a post from one DaveQueener over at practical machinist with some manuals that seemed relevant. Maybe there's something in them that could help you too? Milltronics Partner I Manuals

Do you mean my Spindle Variable Frequency Drive? If so, it looks like it's a Saftronics PC3. I haven't put the spindle through any real testing yet, but I have verified that it does in fact turn and stop, the brake isn't the fastest thing in the world but I've spun it up to about 2500rpm so far a couple times and gave it and M5 to make sure it's starting and stopping at least. I'm still a little unsure about the wiring, I've seen some posts that just say to just wire the no. 1 and 3 terminals which is how its wired up now, but I've also seen a post that explains using a jumper between the no. 1 and no. 2 terminal.

Does anyone have an idea as to which way is correct when wiring the machine for single phase power?

Attachment 190418

[rl49]

imsly2,

I did the same thing but then found a post about a jumper wire from L1 to L2 and that's how I have it now. Mine has a Saftronics PC3 also, I sent you a PM check your inbox

Ron,

[Brian L]

Imsly,,

Nice machine! This brings back a lot of memories of the trials and tribulations of bringing something back from dead. I went thru pretty much all the same computer stuff with Marty's help, found motherboards off ebay, and did the compact flash card upgrade. It sounds like you are more computer literate than I, so you should be able to get all that sorted through.

I run mine off of single phase and do not have the jumper to terminal 2, have never seemed to have any issues without. My spindle inverter is a GP5 though, seems to have been replaced at some time or another. Your braking should be controlled by the VFD, so there are parameters to set for the ramp up and ramp down times. You should also be able to say M03S1000, have the spindle running, type in M04 and it should reverse in the blink of an eye... so that will tell you if something is wrong with the inverter or just a parameter setting.

As for the grease.... I wouldn't panic about how much, you aren't going to be running rapid speeds for any length of time for a while yet, so any excess grease will have more than ample time to disperse. It's nice that you have linear slides, if needed you can replace the slides and trucks and have a like new machine.

ZZZZ will know better as to what software will work with the acroloop cards, but I kind of doubt you'd run Centurion 6 with them. I'm not sure Centurion 6 has any great advantages over 5.... I've only run the 5 and am pretty happy with it's ease of use and ability to do more than I expected. I honestly don't know or use the conversational part anywhere near as much as I should, have been used to using a CAD/CAM and standard g-code programming and it does everything I've needed to do so far. Honestly, before I spent money on upgrading the computer (SBC and Centurion 6 or 7), I'd get the machine running, use it for a while and see how everything shakes out before you invest any more in the latest software. You might need the funds for other things first.....

[ZZZZ]

Congrats, you have accomplished a lot so far.

Regarding the Mag Panel door, you could have driven the pin in that looooong piano hinge out. Start from the bottom with a pin punch, then grab the now-exposed pin end at the top with a vise-grips, tap on it with a soft hammer to drive it the rest of the way out. (Info for others in the future)

It doesn't matter if computer itself is a motherboard or a Single Board Computer card, the motion control interface determines the software type. The Acroloop motion control cards require the Cent 5 software to run them, the Cent 6 and Cent 7 controls use NC Blaster (NCB) motion control. You can get software updates from your local Milltronics dealer.

You can load everything on the hard drive and run the control from there, just copy the files from the sim-disk card, copy the parameter files from the floppy disk, and set up the path.dat file accordingly.

[bluekat]

Imsly,

I too just bought at Milltronics P1- F, congrats, I love mine so far. My vfd was replaced with a Yaskawa V1000. The machines previous owner was running it on 3 phase so I ended up calling Yaskawa to ask if it could run on single phase and how to hook it up. They told me NOT to hook up the jumper to L2 and that I should run a "dc reactor" to help smooth out the power going to the VFD. They recommended a URX000057. I ordered it but haven't got it yet. Attachment 190534Attachment 190536

[imsly2]

Thanks guys!

Regarding the Mag Panel door, you could have driven the pin in that looooong piano hinge out. Start from the bottom with a pin punch, then grab the now-exposed pin end at the top with a vise-grips, tap on it with a soft hammer to drive it the rest of the way out. (Info for others in the future)

That sounds like a good idea, I'll try that since the hinge is still attached to the panel itself and I was a little worried that if I had some holes it in the panel that it might let some dust in. The door has a full lip around it so without any fasteners at all the door will hang onto the opening, this to me made it a prime candidate for some cam locks like I've see on a lot of other panels. Something like these Southco Hex Cam Action Latches 50 Available | eBay

the Cent 6 and Cent 7 controls use NC Blaster (NCB) motion control.

And that seems to answer my question, I can't just load newer software on the machine and it work with the acroloop cards. I guess I'll just keep my eyes open for something to pop up on eBay. I honestly don't really know what the difference is between the 5, 6, and 7. I just like the idea of upgrading the machine as much as possible I guess. But to upgrade the motion controllers doesn't sound like it would be cheap, and I'm guessing it wouldn't make the machine much faster/smoother/stronger using the same servos so there probably wouldn't be much point for me. I'll mostly be using Mastercam for the tool paths, or using the machine manually, or making my own conversational/parametric programs. Does anyone who's worked with the newer and older controllers know of any features worth the upgrade prices?

[imsly2]

As for the grease.... I wouldn't panic about how much, you aren't going to be running rapid speeds for any length of time for a while yet, so any excess grease will have more than ample time to disperse. It's nice that you have linear slides, if needed you can replace the slides and trucks and have a like new machine.

Thanks Brian,

That makes me feel a lot better. Your point about the rapids make a lot of sense, most of the info I was seeing about the lighter weight greases and specific amounts were in fact machines that were moving much faster than the little partner will ever go, and I can baby it a little while for the first 3 months or so as well seeing as how I don't imagine I'm going to be in real huge hurry.

Does anyone else with the rails have some advice on how much and what type of grease to use for mills like these?

[imsly2]

Yaskawa V1000
They told me NOT to hook up the jumper to L2 and that I should run a "dc reactor" to help smooth out the power going to the VFD.

My spindle inverter is a GP5
I run mine off of single phase and do not have the jumper to terminal 2

Saftronics PC3
I did the same thing but then found a post about a jumper wire from L1 to L2 and that's how I have it now.

It seems like all these VFD's will run without the jumper, I guess my best bet is to call Milltronics about the PC3 to make sure which way it's happiest.

I've been trying to find some more information, and it seems pretty unanimous that running a 3 phase VFD on single phase in general causes additional stress to it. So I'm probably still looking at building a phase converter, I'm sure I'll need one for a lathe anyway.

[Brian L]

All VFD's designed for three phase will run on single phase, but they have to be de-rated, some brands say they will output 75%, some say as low as 50%. The older Safetronics units are pretty stout, so they seem to run fine on single phase... besides, I highly doubt you will ever be running the machine hard enough to be stressing the VFD... we don't have spindle load meters, but I've buried some end mills and face mills pretty deep and never heard a protest.

A word of caution with rotary phase converters, most of them are for crap, and they wreak havoc on CNC equipment.... not so bad for manual equipment, but you will have no end of issues trying to run a CNC on them. If you feel the need, pony up the $3k or so and buy a Phase Perfect, they are the only real answer for three phase not from the utility company.

Software upgrades, if you are programming with Mastercam, it's going to post the code and you will have expanded memory to run long programs from the machines computer... still have to run them DNC, but you don't have to rely on an RS232 cable and a computer. Your machine will move at some pretty good rapids, probably 300-400 ipm, and cutting feeds can be up pretty high too, 100ipm or higher should be doable on longer moves.... any machine runs into problems maintaining high feedrates on tons of short moves, like 3D mold work or small engraving. I assume you are going to be making 4x4 parts and general home shop type stuff, you'll never run into the ceiling with that sort of thing.

[imsly2]

you will have expanded memory to run long programs from the machines computer... still have to run them DNC,

I'm a little confused on this one, so even after installing a larger drive, you still have to DNC from that drive into the controller? Are the programs too large to load into the controller? I have seen something similar on fanuc controllers and having to run programs from compact flash cards or the data server because the programs were too large to actually load on the controller itself. And in the case of fanuc, there are certain limitations when running in dnc mode such as not being able to use GOTO statments and some other LOGIC operators. Which makes it really annoying on programs where you need to start back up in the middle.

In the F10 (UTIL) | F8 (INFO) section I see...
Memory Avail : 248782 (242.961KB)
Parts Storage : 2147450880 (2gb)

Is the Memory avail the size limitation of what you can actually load on the controller, and if the file exceeds that size you have to dnc it?

I have tried increasing this number by increasing the machines extended memory (now 64mb) and increasing the virtual ramdisk size for the graph directory (now 32mb) but the Memory Avail doesn't appear to come from either of those, it seems like its limited by the max conventional memory size set by dos.

Assuming that's the case, it looks like the controller software itself is using 322.04Kb of that memory and therefor the max you could ever possibly have here would be 640Kb - 322.04Kb = 317.96Kb (or 325591 bytes) Does anyone have a number larger than this in the Memory Avail in their INFO section? I'm really hoping there is some way to let the controller access maybe the extended memory, I'm also looking into some third party dos extenders as well. It just seems like such a waste to have so much memory in the machine (768MB) and not be able to use it.

Does anyone know if my assumptions are correct here? And in the case of upgrades offered by Milltronics, when they say upgrading you to 64MB 256MB ect. I am guessing they are just referring to the parts storage and not the available controller memory..?

This seems like the last part of the controller puzzle to me, if I could find a way to increase the Memory Avail I think I could die happy.

I was however able to install a network card and Microsoft Network Client for MS-Dos which allows me to access a shared directory on my server though. I actually have a network drive mapped as the programs folder in the path.dat file. So I can drag files to a directory on my network and the machine can see and open them. It's probably about the most efficient setup I can think of, pretty much just like data-server on a fanuc controller without the need for an FTP client, and the files are stored on the network instead of the machine.
Does anyone know how Milltronics sets up their network card installs? Is it something in the controller software or do they handle file transfer with dos? I don't see any directory or ftp settings in the controller software, so I'm kind of interested in hearing how they set it up.

any machine runs into problems maintaining high feedrates on tons of short moves, like 3D mold work or small engraving. I assume you are going to be making 4x4 parts and general home shop type stuff, you'll never run into the ceiling with that sort of thing.

I am actually kind of planning on doing some 3D work, one of my first projects is going to be an Ar-15 lower, which will probably have lots of little 3d sculpting paths. I still don't really have to run it that fast though, some lookahead to slow down and speed back up on back and forth motions would be nice though, I'm more concerned with wanting to take it easy on the machine rather than faster production. Anyone have any tips for optimizing 3D paths?

[Brian L]

Dos is the limiting factor, it only recognizes 640Kb, so just as you have surmised, the software takes a portion of that and you have not a lot left for your programs. This makes you have to do some work arounds..... larger files have to be run in DNC mode, that means you can load it onto the Mill's computer, so you are not relying upon an RS232 connection to drip feed the program from another computer. You also can not edit the program on the mill once you are over the space allotment..... any changes in the program have to be done offline and then fed back to the computer. As for "start from the middle" type of thing, I can't say, never tried it, but the machine will do start from a specific line, or tool normally, so you might be able to do a recovery type situation, I don't know.

I'm not sure at what upgrade point the machine has a larger memory, would have to be if/when they got away from DOS as the operating system. I have a network card and have yet to install it, but it sounds like you have it working correctly. The advantage you will have there is with long programs, feeding them over RS232 can take a long time... I had a 1.5mb program for a 3D part I was doing and the transfer time from my computer to the machine was over 40 minutes.... then if you find an error it's delete it, edit on the pc and then send it again for another 40 minutes. You will get past that with almost instant uploads when networked.

3D paths can be optimized if you run the longest straight directions so the machine has a chance to accelerate. You will need to watch step over amounts as using small ball endmills and really small step overs will make programs huge and machining time long no matter how fast you can get the machine to move. All that said, you will be as fast as anything else out there shy of some $100k machines with high speed processing and specifically set up systems for 3D type work.

You will be best served by good software that can use bull nose end mills to get all the flat areas and then transition to ball end mills for just the areas that you will need them, reducing the time spent profiling with a little tiny contact point of a ball end mill. Sounds like you already have software that's capable.... I'm working with cheap or free stuff and have to cobble programs together to be effective.... pretty hard to justify spending twice what I did on the mill for software to do the occasional 3D part for me.

[sportybob]

A quick run down on DOS memory. DOS has a memory limit of 640K how they getaround that limit is by using extended memory managers ( think drivers for DOS)EMM and XMS are 2. by using these you move some of the DOS into "upper menory blocks" and then DOS can better utilize the memory that is available. The config.sys and autoexec.bat files must be set up properly to enable and use the memory managers. properly set up there is no reason you can not run a 30MB program directly.

DOS 3.3 has a drive size limit of 32MB and DOS 6.22 has a drive limit of 2GB. If using a drive larger then the DOS version allows, you must either partition the drive into multiple "drives" or set the heads and cylinders for a "max drive size" IE: 32Mb or 2Gb.

Networking, WIN7 does NOT PLAY NICE WITH DOS. if you want to network use a PC with WIN XP to connect to the machine. You can use the XP box as an "Interpreter" between a Win 7 PC and the control. This is easier then trying to get networking set up on a WIN 7 PC direct to DOS. It can be done but it is a PAIN. ( it's all about the "permissions" and "security".

When milltronics comes out with a new software version, they make several variants. C5, C6, C7 and for several years the Linux control version, the CNC 8200 control.
The added fuctions they add in a software update are in all variants. IE: softwrae version 5.390 has the same conresational fuctions as 6.390 and 7.390. Some added functions show up in the C5 parameters but dont work, some are for C6 and some for C7. There are parameter settings but unless you have the hardware to support the parameter fuction, it will not work.

feel free to PM me with questions.
sportybob