[timewarp]

Hi Phil, didn't see the updates, I am looking at http://webpages.charter.net/pminmo/cncelectronics.htm
Are they at another site??

[tekno]

alot of info here.. but Im confused at this point.

is there a
bipolor controler board, chopper board and a 1/4 or 1/8 stepper board?

Tek

[slp_prlzys]

tekno, I think the 297/298 combo is a chopper full - 1/2 step board, the a3977 board from Phil's site is also a chopper board that do microstepping.

[tekno]

Phil's site is also a chopper board that do microstepping.

link to Phil's site please

And thanks

Tek :cheers:

[Ferenczyg]

Phil's site is at post #361


/Fer

[pminmo]

Actually they Benny made an active page out of post #1 of this thread.

Phil

[pminmo]

Timewarp,
Try forcing a refresh on your browser, they are there.

Phil

[pminmo]

To those interested/affected
I pulled the 3 axis interface board off my website and just left the 4 axis (of course it can be used with 3 axis or 2 axis or 1). Reason, just easier to support one board. If your headed down the old 3 axis board path, I still have the data and will be glad to answer questions, email files, etc. There is some documentation started now for the 4 axis board. If a person wants to leave off the 4th IDC pin header (less than a buck) there is little cost difference to build, so to me it just makes sense. Plus look at all the posts where people are building 4 axis to use on their 3 axis machines! (GROWTH POTENTIAL!) Unless otherwise talked out of it, I'm probably going to reduce the number of files on my website. Basically for each board going to one pdf documentation file, which will have a schematic and layout in it, one pdf file for copper, and possibly leaving a pdf schematic also. Trying to organize, unclutter the webpage and free up some webspace. Thoughts?

Thanks,
Phil

[MrBean]

Sounds like a good idea. It will make it easier to see what's what at a glance.

Do you have any plans for a PIC microstepping driver in the works. I know there are one or two mentioned on the "zone". You seem very active, supportive & regular updates. Would be nice to see a microstep driver.

Great job so far. Look forward to more of the same please.


Regards Terry...

[pminmo]

MrBean
Actually there is one microstepping driver on the site. The A3977 (although I wouldn't recommend it to anybody that is not highly knowledgable of electronics), and the L297-298 board.

Also, Pigifly has finished a one sided layout for the L297-8 board and has started a new thread on the ZONE here:
http://www.cnczone.com/forums/showthread.php?t=6339

The L297 will do half steps. What is your primary reason for wanting microsteps, resolution, quietness? Because there are some downsides of microstepping also. I can't say that I have found a good reason for a cnc size machine to do microsteps for the tradeoff.

Phil

[MrBean]

My motors resonate/vibrate quite badly at certain speeds as my boards are full step. Extra resolution of microstepping would not be required, but it's there anyway.

What I require that my current boards do not give me is:

Current limiting (Chopper)
Quieter/smoother running

Maybe 1/2 steps would reduce the vibration a bit?? The 297-8 would also give me current limiting.

Would you say that half stepping would be enough to reduce the vibration. If so, I'll maybe have a bash at building the 297-8.


Regards Terry...

[pminmo]

Terry,
A chopper alone may solve your problem.

Phil

[slp_prlzys]

half step does make a difference, I built the discrete board full step, and the UCN5804
version full/halfstep capable, and I like the smoother motion with the 1/2 step of UCN5804, less noise.

[pminmo]

slp,
long time no hear from, how's it going?

Phil

[pminmo]

ITO,
What about this FET STP30NE06.

Phil

[slp_prlzys]

Phil, yes hi,
I got hook with the picmicro thingies,
I'm trying to build a plotter/vinyl cutter, like on Luberth.com site, as
it is considerably quiet in operation, compare to cnc router.
I built the prototype for pstep board, based on the pictures on the site,
I can now blink a led using serial port I'm now attaching the discrete board
to it and see if I could step it.

[pminmo]

slp,
Great, sure you don't want to change your studies to electronics? No help here on the PicMicro's, but AVR I can.

Phil

[slp_prlzys]

OT: I'm actually trying to learn more of electronics now,
I'm eyeing to buy a books authored by Horowits & Hill,
'seems highly recommended, I'm just trying to build
something useful for extra income, it's "earn while you learn thing".

[Ito-Brazil]

Hi guys i need some help on my DISCRETE project:

is that right? i send a picture from the pcb lay-out an i saw something diferent...
please help me, because i will mount my first discrete driver this week end!
thanks a lot!
Other thing: may i use the "green areas" to personalize my pcb, like put a name, a number etc...????

[pminmo]

Ito, that is correct. I downloaded my website eagle .brd file and its the same as my local file. Pins 6, 7, and 8 are all grounded. Yes you may use the green area for anthing you please.

Phil