OpenServo.com

[ginge]

Hi all,

I have finished my preliminary convertion to Eagle PCB format.
It includes both a schematic, and the board.

It passes both ERC and DRC without too many warnings, though a lot of the remaining issues are related to the design of the original Openservo design.

It's a little rough around the edges in places, but functional.

This would be considered an alpha release.

http://headfuzz.co.uk/openservopcb

There is a readme.txt file in the archive that outlines the issues.

Barry

[ginge]

I have done a little tidying up of the PCB design. The filename remains as above.

I am considering setting up a CVS at my page for the revisions I will no doubt have to make.

Barry

[andylippitt]

Like Mike, I'm off on a ski week, but when return, Tuesday, we can add it here and set you up with CVS write access.

[ginge]

Thanks, enjoy the holiday!

[mpthompson]

Barry,

I downloaded and installed Eagle 4.16 for Windows and I'm looking at the OpenServo schematic and PCB you put together. I can tell this program will take me a little while to get accustomed to.

I'm sure I'll have plenty of questions as I start digging into Eagle as a PCB layout application .

-Mike

[ginge]

I have no doubt made a few revisions since you downloaded it. When I get cvs access I will put up my current version.

Note that the version you are in possesion of has serious flaws. I have corrected these problems, but I wouldn't expect it to work :/

I have also drafted a version with most of the PCB updates so far. This I will also place into CVS.

Barry

[mpthompson]

No problem with the revisions. I'm just kinda poking around with it for now and gearing up to start on software revisions for the ATmeg8/168. I'll probably start looking at Eagle in earnest after I have ported the software over the next week or so.

-Mike

[RifRaf]

Hi guys, first post, just found this project yesterday and jumped in and made an eagle design because i didn't think to read here first

Anyway, check it out and let me know what you think http://rifraf.rememberit.com.au/AVR/openservo.htm
wish i had seen the parts library and work done by yourself first ginge, will maybe update some stuff but enjoy. Still have no components so cannot make it up but gonna drill it and solder in vias shortly

[mpthompson]

I'm impressed with your hand made PCBs. I was too chicken to try that out myself .

What kind of servo hardware will you be controlling?

One comment I have is large pads to the motor on the underside of the PCB. You will want to make sure these pads don't get shorted together by the metal motor case. If it looks to be a concern, you may want to cover that portion of the PCB with some electrical tape.

-Mike

[ginge]

Good work!

I hand made my version of the eagle design, and didn't get as good a finish as you. What method of transfer are you using?


Barry

[RifRaf]

For making pcbs I use basic photo paper and iron it onto copper like a transfer, then carefully soak it off, rubbing off the paper rather than peeling the whole thing off. All efforts with Toner transfer paper and stuff don't give me as good results. the method is very similar to the 'gootee pcb' .http://www.fullnet.com/u/tomg/gooteepc.htm but have worked on the technique to perfect it. Planning to use the openservo with standard servo hardware and robots, have made the motor pads smaller and also increased the via drill size to allow easy drilling with drill press, arranged the parts a bit closer but still not as close looking as the other designs you guys have but will see how it fits into a motor. gonna try etch a few more in a bit and will update the same page

[ginge]

Ahh the good old transfer method. I have also used this in the past, I think I will give it a go again, as your results are good.

Barry