Re: [CAD_CAM_EDM_DRO] anyone using jr-kerr servos

I tested one of them . They work well but that step and direction adapter
slows it way down. Using a 486-66 the best I could get was about 400RPM with
a 500 count encoder. It was much faster using the direct link.
Dan
-----Original Message-----
From: Carlos Guillermo <carlos@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Thursday, June 01, 2000 4:48 PM
Subject: RE: [CAD_CAM_EDM_DRO] anyone using jr-kerr servos

>Andrew -
>
>I've thought about using the JRKerr setup. How's the smoothness and
>following error with the step/dir input version? Also, what kind of speeds
>can you get, and what's the limiting factor?
>
>Thanks in advance,
>Carlos Guillermo
>VERVE Engineering & Design
>
>
>
>> -----Original Message-----
>> From: andrew abken [mailto:kn6za@...]
>> Sent: Thursday, June 01, 2000 9:34 AM
>> To: CAD_CAM_EDM_DRO@egroups.com
>> Subject: [CAD_CAM_EDM_DRO] anyone using jr-kerr servos
>>
>>
>>
>>
>>
>> I have set up a three axis minimill with the jr-kerr stuff and
>> drive them
>> with the step/dir output on emc. Just looking for others who have worked
>> with them and who wish to make a comment on their experience.
>>
>> My system went together well, and works nicely for my small machine. I
>> don't think I would use them on anything larger than a minimill.
>>
>> Have you seen the machine controller program up on their web site? It
>> works, but without backlash compensation its a bit useless. If I ever get
>> more time I would like to work on that program and make it more usable,
>> being that its open source.
>>
>>
>> thanks,
>> andrew
>
>
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