CAD CAM EDM DRO - Yahoo Group Archive

Re: Electronics gurus please help

Posted by mariss92705
on 2002-09-10 13:11:56 UTC
vajk,

The most important PCB layout consideration for power circuits is
ground and power supply distribution. If you like, send me your
circuit diagram and board layout and I will critique it for you. Best
would be a .dxf or .dwg format. Use the mariss92705@... e-mail
address.

Mariss


--- In CAD_CAM_EDM_DRO@y..., Vajk Fekete <vajk.fekete@o...> wrote:
> hi,
>
> i am building a stepper driver for my homemade mill, that i am
going to use with EMC.
>
> i have salvaged some steppers (60ozin, 6 wire), and also the driver
chip from old printers.
> the driver is a sla7026, 3A max chopper, unipolar.
>
> question1: is a chopper unipolar driver much worse than a chopper
bipolar drive?
>
> question2: a bit longer, and i badly need advice here:
>
> i have built an axis drive on veroboard, with rather long wires,
etc, and it worked ok.
> then i made a rather simple pcb, built a sigle axis on that, and
after correcting some errors, it works ok.
> then i made a final design for the pcb, built one axis, and it does
not work. built another, and the with same symptoms it is not working.
>
> so experts: at a chopping frequency a couple 10Khz, could the pcb
layout have this much influence? i checked all the components, all
the connections, spent about 2 days on it, so i am 98% that the
> working and not working circuit only differs in the shape of the
traces.
>
> i am no EE, but have some electronics building experience, more
from the digital world. and i do not have a scope, so cannot check if
the timer is working ok or not.
>
> any ideas are welcome,
>
> thanks,
>
> vajk

Discussion Thread

Vajk Fekete 2002-09-10 08:14:40 UTC Electronics gurus please help Peter 2002-09-10 09:15:36 UTC Re: [CAD_CAM_EDM_DRO] Electronics gurus please help bsptrades 2002-09-10 10:33:49 UTC Re: Electronics gurus please help caudlet 2002-09-10 11:25:32 UTC Re: Electronics gurus please help mariss92705 2002-09-10 13:11:56 UTC Re: Electronics gurus please help Vajk Fekete 2002-09-10 13:44:29 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Peter 2002-09-10 14:14:57 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help JanRwl@A... 2002-09-10 15:05:29 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Erik Reikes 2002-09-10 16:00:58 UTC Re: Electronics gurus please help caudlet 2002-09-10 16:25:56 UTC Re: Electronics gurus please help Raymond Heckert 2002-09-10 17:39:25 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Jon Elson 2002-09-10 22:20:59 UTC Re: [CAD_CAM_EDM_DRO] Electronics gurus please help Jon Elson 2002-09-10 22:28:48 UTC Re: [CAD_CAM_EDM_DRO] Electronics gurus please help Les Newell 2002-09-10 23:41:42 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Peter 2002-09-11 06:21:42 UTC Re: [CAD_CAM_EDM_DRO] Electronics gurus please help Carl Mikkelsen, Oasis 2002-09-11 06:52:00 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help mariss92705 2002-09-11 09:58:57 UTC Re: Electronics gurus please help Jon Elson 2002-09-11 10:25:40 UTC Re: [CAD_CAM_EDM_DRO] Electronics gurus please help Scott M. Thomas 2002-09-11 11:30:57 UTC RE: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help mariss92705 2002-09-11 12:38:48 UTC Re: Electronics gurus please help mayfieldtm 2002-09-11 12:46:01 UTC Re: Electronics gurus please help Scott M. Thomas 2002-09-11 12:54:25 UTC RE: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Ian W. Wright 2002-09-11 14:38:35 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help mariss92705 2002-09-11 19:01:20 UTC Re: Electronics gurus please help scottdbtnet 2002-09-11 19:08:58 UTC Re: Electronics gurus please help scottdbtnet 2002-09-11 19:30:01 UTC Re: Electronics gurus please help mariss92705 2002-09-11 21:45:52 UTC Re: Electronics gurus please help Scott M. Thomas 2002-09-12 05:52:34 UTC RE: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Jon Elson 2002-09-12 10:17:57 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Scott M. Thomas 2002-09-12 11:42:16 UTC RE: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Steven Ciciora 2002-09-12 14:48:02 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help mariss92705 2002-09-12 15:29:56 UTC Re: Electronics gurus please help Raymond Heckert 2002-09-12 16:49:05 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Keith Bowers 2002-09-12 17:02:44 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help Jon Elson 2002-09-12 22:16:51 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help yildirimalper 2002-09-12 23:11:01 UTC Re: Electronics gurus please help MIKEC@W... 2002-09-13 00:10:42 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help MIKEC@W... 2002-09-15 13:01:35 UTC Re: [CAD_CAM_EDM_DRO] Re: Electronics gurus please help mariss92705 2002-09-15 13:25:50 UTC Re: Electronics gurus please help