Re: temperamental G's

Peter,

"All 3 silent" This means something in common to all 3 drives is not
correct. That means the PC, the power supply and whatever is in
common with the DISABLE input.

(1) Are the LEDs lit? If not, check to see if they have power.
(2) If lit, check to see if the motors have holding torque.
(3) If there is torque, then they are not getting step pulses.
(4) Check if the PC +5VDC goes to terminal 10.
(5) Check to see if the PC is outputing step pulses (change PCs).
(6) If there is no torque, remove wire from DISABLE input and test it.
(7) If there is no torque, check motor connections.

I hope that helps.

Mariss

--- In CAD_CAM_EDM_DRO@y..., "cadcamcenter" <cadcamcenter@y...> wrote:
> Hi,
>
> I had 2 of the 3 G201A's working in a driver box when I tested them
a
> short while ago. Without changing anything to these 2 G201A, I
> rewired the third one. When I tested them again, all 3 were silent,
> including the 2 that were working earlier. I had similar problems
> earlier, with the Geckos deciding to go on holiday for no reason
> that I know of. A list member (thanks) helpfully suggested that the
> 3us for the step pulse width was too low, so I reconfigured the
step
> pulse width to 5us. Still no luck. Since I'm hoping Mariss will
soon
> conjure up a new toy for all of us to play with, I do not wish to
> distract him and hope that someone can provide some insight as to
why
> the 2 G201A which were working fine earlier can suddenly fall dumb.
>
> The Geckos are fine products as I have another 3 Geckos in another
> box which are working fine. It is probably something other than the
> Geckos. Is it that the Geckos need a rapidly rising edge for the
step
> pulse and less rapidly rising step pulse can cause the Geckos to
> become temperamental, or Gecko's of different vintage have
different
> requirements, as the other 3 Geckos are working fine with the same
> pulse train?
>
> Many thanks
>
> Peter