Re: [CAD_CAM_EDM_DRO] PWM input Servo Amp / Universal Stepper Controller

Then again, if you allready have the mounts, it might be simpler to couple a
small servo, (dead or alive, but unpowered), to the far end of the lead/ball
screw, and just power the encoder. This would be a good use of old dead servos,
and might be a good intermediate step, in converting from steppers to servos, in
that you could test the system as you go, without losing functionality during
the conversion.

Bill

On Fri Apr 30 11:25:44 2004 Nick Ibbitson wrote:

>I like the idea of this, does anyone know how this could be done?
>Nick
>
>----- Original Message -----
>From: <jess@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Friday, April 30, 2004 8:36 AM
>Subject: Re: [CAD_CAM_EDM_DRO] PWM input Servo Amp / Universal Stepper
>Controller
>
>
>> Ok I have a question.
>>
>> Someone posted a link to US Digital on another topic so I surfed over and
>> found heaps of stuff about Encoders ie that can be fitted to various
>shafts
>> for motion data.
>>
>> Here is my question.
>>
>> Considering the cost of servo motors with encoders is quite astronomical,
>> what about a stepper motor say in the hi torque 34 42 NEMA size with
>encoder
>> from US Digital to over come the problem when a stepper loses steps.
>>
>> But which controllers and drivers are compatible to accept encoder
>> feedbackloop while driving a stepper?
>>
>> Regards Jess


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