From: Jim Thompson
Subject: Re: Closed loop stepper driver circuit
References: <02pS9.20379$9N5.firstname.lastname@example.org> <3E1B3267.811F7E6F@SpamMeSenseless.us.ibm.com> <3E1CDB90.B26AC092@rica.net>
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Date: Wed, 08 Jan 2003 02:25:21 GMT
NNTP-Posting-Date: Tue, 07 Jan 2003 21:25:21 EST
Organization: Cox Communications
On Wed, 08 Jan 2003 02:14:54 GMT,
John Popelish ,
In Newsgroup: sci.electronics.design,
Entitled: "Re: Closed loop stepper driver circuit",
Wrote the following:
|Phil Hobbs wrote:
|> Kevin Doney wrote:
|> > Anyone know where I can get a stepper driver with encoder feedback or a
|> > circuit drawing of one?
|> Hmm--If you're using an encoder, why bother with steppers? What with
|> resonances, missed steps, acceleration limits, losing lock, and so
|> forth, they're much more difficult to get right than servomotors. Their
|> sole advantage is that you can do open-loop control at some level.
|> Phil Hobbs
|Phil, are you posting open or closed loop? ;-)
ROTFLMAO! Looks like he missed a step (or five ;-)
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
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