RE: [CAD_CAM_EDM_DRO] Re: [CAD_CAM_EDM_DRO) 555 Timer circuit Request

Bill:

I worked with some Superior steppers with Unipolar drives twenty some years
ago. We used a simple multivibrator gated into the CW and CCW inputs of the
controller board to drive them. No acceleration or deceleration. No problems
either. The issue is wether or not the motor can supply the required torque
"instantaneously." If it can, the motor will turn reliably. If it cannot,
the motor will either lose steps or stall.

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, so little time



-----Original Message-----
From: wanliker@... [mailto:wanliker@...]
Sent: Tuesday, May 22, 2001 3:15 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re: [CAD_CAM_EDM_DRO) 555 Timer circuit
Request


In a message dated 5/21/01 10:36:10 PM Mountain Daylight Time,
KM6VV@...
writes:

<< There must be ramping for steppers. Even changing the speed abruptly
will
stall

> a motor.
> Rich D. >>

If used for testing a stepper for movement or using it for a manual drive,
is
this going to be a factor? I was thinking that this is one thing that is
missing for someone that wants to test or drive a stepper but is not set up
with a computer program to feed the signals.
bill

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