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I am living in SE Asia (Macau) for the next year or so, and I want purchase a desktop CNC 3-axis machine or router, preferably belt-driven for speed over accuracy. The working envelope can be...

Here's a link to a dxf file of mine:

http://www.hermandesign.us/cad/CAMLineOrder.nc

Simply change the nc to dxf after downloading. It stops it from just showing the text of the dxf file in the...

Chasing threads! :)

So for a BALL vs BULL nose the E = 0 since the point at the tip is the core diameter - E. I see. Thanks again, Toby.
Rob

See the new post I just put up about the size of the parts I am working on. the smallest part is 5ft x 2.5ft! I would have to manually select 960 ends of lines in zoom mode. Yes, it is resolved. It...

I am working on a HUGE relief cut into a sphere (30 ft in diameter - in parts of course!). My custom written software generates stl files from images. I wanted to use BobCad, but I needed to machine...

That's it! Thanks, can you explain what E actually is please.

Rob

Under Tool definition/selection on the NC-side of things in BCC, how do you define a ballnose cutter? There are only D and E parameters. Would a 3/16" dia. shank, 3/16" diameter ball nose cutter be:...

Nix that. Arcs are a bad idea for this application. For some reason, when I zoomed all the way out, the flip every second option worked the way I wanted. I was zoomed into a segment of the spirals...

I found the solution...I think. This may be helpful to others, so I am answering myself and you too, toby.

I splined the lines with arc of .004 accuracy. I then selected all and used the flip...

Maybe, there is a parameter I am missing in BobCad. One where you could set a limit on the length it uses to find the next point to machine as a function of the distance from last point machined? In...

Yeah, thanks. I found that one, but that makes all of the little arcs opposite eachother in the larger arc shape. I need one chain of arcs to go one way and the others to go the other way. I could do...

I have a dxf file with what is a spiral path geometry. When I try to NC it in BobCad the tool rapids to the safe z height and then goes across the geometry to start the next spiral in the opposite...

How did you calculate it? If I took what WinCnc was the total cut length in its simulation mode, I would have a different number. Mine is much longer. For example, I take the dimension I am cutting...

Success! I removed the idler shaft and spring on the z-axis of my PCNC and it alleviated some of the motor's load WITHOUT sacrificing accuracy. On the y-axis, the belt would sag quite a bit without...

Sounds good. The Practical CNC table I already have has a dedicated pci card (7200) with dsp's. I'm sure it's very fast. I think the major hurdle to speed is the motors and the masses they need to...

Sorry, but I am yahoo illiterate. I can't find the gecko group. Belts and pulley's are fine by me. I've had good success with them before with stage effects. My accuracy requirements are not too...

Yes, I do. 9-10" wide by 7-1/4" tall with a .015 stepover would take me about 2-4 hours. I wrote my own software to turn the photo into a 3d relief. My depth of cut is anywhere from .095" to .150". I...

Also, on the y-axis under the covers, there is a similar idler setup. I am looking to see what the closest belt size is that will allow me to get rid of that idler as well. I'm sure there will be...

No, my a value under the axisvelspec? is 1100. There is an accel variable at the very beginning of the file. It is for the increments that can be used to step up the acceleration. I have made the...

There are many settings in the wincnc.ini file. I have played with the following:

At the top of the file, the accel=50 I changed to 100

For each axis, I changed the r,f,h values to 400 except...

justin and cut more,

What josh talks about in setting the resolution is correct; however, considering the same pinion and rack and stepper are on each x and y axis, the resolution should be the...

Is there a CV, or constant velocity feature in WinCnc? Perhaps in the WinCnc.ini settings for vel and accel. My table will only make a real 15ipm when I tell it to cut at 90ipm on my 3d part work. On...

I have owned a PCNC table for routing for over a year now. I have cut my boat kit parts with it, some korbels and some 3d work; however, I have to agree about the service. I spent a good deal of...

I'll certainly look into it. It would be a great no-cost upgrade, other than MachCNC for $149. Thanks.

Rob

Buscht,

Thanks for the link. Now, that's what I'm talking about. They use servos. Very high quality machine construction. Shopbot uses Alpha Step Plus motors, but they list for $1000 and > each...

It is a WinCnc controller. It came with a pci card for my pc and then that goes to their box. I'm pretty sure it's step/dir, so I guess I could try MachCNC. The cards it uses are dedicated and fast,...

I am looking for a high-speed router for 3d work. Ez-router (www.ez-router.com) claims 500ipm on 3d parts and 800ipm on rapids. It basically looks like a rack and pinion drive with steppers. I...

CNCRob, nice, very nice. I'm sure she'll love it.

Regarding Dust Collectors: I have made my share of soda bottle cum dust skirt dust collectors, and one thing I found out is that the hole for the...

Thanks, I found it at home last night. The amps are rated at 18khz and the rutex h9x1 series is rated at 1,000,000 pps. I am assuming that is 56 times more frequency than I need, so the parallel...

The Rutex servo stuff all says DC servos. Is there one for AC servos? thanks.

Rob