G201A - round of applause for Mariss..

mariss92705@... wrote:

> I've made some improvements to the G201
> that were were requested. The improvements are:
>
> 1) Automatic current standby of 33% of set current after 1 second after
> last issued step pulse,(disableable internally).
>
> 3) The opto-isolator now operates at 8mA instead of 16mA. The greater
> sensitivity better matches the drive capability of a LPT port.

These are BIG wins!

> All these improvements are at no increase in price.

That never hurts either....

> Minor stuff includes a common servoamp design (+/- 10 vot input
> transconductance amplifier) and a 3-phase brushless DC servoamplifier.

Whooa, this is not minor .. a bunch of us have been waiting for this!
Does this use the quadrature encoder for feedback, and if so, how do
you compensate for differing counts/rev from different models. Does
it need the index pulse?

> Mariss
> Geckodrive Inc.

Good work!

Doug Fortune