Re: [CAD_CAM_EDM_DRO] INCONSISTENT STEPPING - WIERD SITUATION

ja_erickson wrote:

> hey all,
>
> ive just wired up one drive on a bridgeport series 1 with
> size 42 steppers using gecko 210 drives. the system is being driven
> by master5 software and is exibiting some strange behavior.
> when im jogging the motor in one direction it functions smooth as silk
> but when i attempt to jog the motorin the opposite direction,the
> motor misses steps, stall and growls.any suggestions

Note that the Gecko drives have funny requirements for the direction
signal not changing for up to 500 uS after a step pulse. Apparently,
for Gecko drives to work correctly, the direction signal should only change
at the beginning of a step pulse. Most software does not generate
the signals like this. Most other drives sample the direction signal
during the step pulse and then don't mind if it changes later. Many
software CNC programs let the direction signal return to '0'
between step pulses, which will drive Geckos crazy in one direction.
That is why I'm guessing this might be the problem. Se if master5
has any info on setting up for Gecko drives.


Jon