Re: [CAD_CAM_EDM_DRO] Dirty Little Secrets

dakota8833 wrote:

>deanc500 wrote:
>
>Hi Frank, I saw your post on the err/reset problem as I was scouring
>the archives for more info. I am still having major problems on one of
>my controllers and I am looking for possible solutions. The drives
>fault really really easily when the err/res pins are tied together.
>Any Ideas on a fix yet?
>
>Thanks
>Dean
>
>
>
>
>After replacing two of the drives I got my system to work with the
>err/reset pins tied together.
>I talked to Marriss in the past and he said to add a cap. between the
>err/reset and the encoder ground. He also said to try a resistor in
>line. Since my system is working I feared tampering with it.
>I had scoped the err/reset pin and found a lot of noise. It is my
>belief that the noise from one drive adds to the noise already present
>in a drive thus causing the fault. As current demand from the motor
>increases so does the noise current. So far Marriss is no help. I am
>thinking about posting the subject called " Dirty little secrets ".
>It is about product reliability and what manufactures don't want the
>consumer to know. I know this because I'm a former auto electronics
>tech. I can tell you this , many electronic components failed just
>outside the warranty period. If the failure rate was high and we got
>a service bulletin telling us, we replaced the components for free.
>We were told not to tell anyone that there was a mass problem.
>Unfortunately the only person that can fix this problem is Marriss.
>
>

Well, the G201's only have a disable input, not an error/reset terminal.
But, since
there is such a problem on some other models, I did my enable/disable with a
multipole relay. I used one normally closed contact to disable each
drive unless the
relay was energized. I don't know which Gecko drive you are using, but
you may
be able to come up with a similar solution, using separate relay
contacts to reset
the drives, and one opto-isolator on each drive to sense the fault
condition and
or them together to inform the CNC control software of that situation.

Jon