Re: [CAD_CAM_EDM_DRO] GeckoDrive: seeking practical advice aboutthe Big Capacitor !

Thanks for all the replies.

Here's what I did since posting the question:-

I wanted to confirm my thoughts that a higher Voltage would cure the problem (see original post), so I rigged a 24 Volt 8 Amp Supply in series with the 36 Volt (8 Amps) (thanks Jon)

Both supplies are Switchers and regulated they only drop a few millivolts at 8 Amps (High $$$ supplies)
I was surprized even with 60 Volts the problem did NOT go away and then turned my attention to the PIC Pulse generator Software and added a Ramp with three steps (each step has it's own slope adjustment
and has each slope has 6 Steps).
By bringing the motor up slowly (1 Second) and then at about 80% I increased drive frequency more slowly (final 1 second) the motor
now runs fine on 36 Volts under full load.

Conclusion:
With Regulated Power Supply the 15,000uF is a waste and will only stay in place because it's part of a refurbish/upgrade and the cap. lived there before !
Upgrading to 56KuF is a waste of time....

Thanks again.
Best Regards
Hans W
PS Correction to original post,, the 15,000uF is a 63Volt working cap not 50 Volt.....!