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From: Paul Burke
Subject: Re: Closed loop stepper driver circuit
Date: Thu, 09 Jan 2003 08:59:11 +0000
Organization: Scazon Systems
References: <02pS9.20379$9N5.firstname.lastname@example.org> <email@example.com>
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> "Kevin Doney"
> Anyone know where I can get a stepper driver with encoder feedback or
> > circuit drawing of one?
It's no great problem to design a stepper/ encoder feedback control
system - anything that will output phased pulses, any encoder input
device (HCTL20xx). The big problem is what to do wih the feedback. You
can't just put in a voltage (very roughly speed) gain as in a servo
system - if you throw thousands of steps suddenly at a stepper, it just
I suspect what the OP wants is something to check that the drive is
still going, so he can implement a recovery strategy in case of error.
And what you do then depends entirely on the system you are
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