Separate posting so Tom doesn't have to dig through the above post to notice:
My nominally 65V 12.5A servo power supply is putting out about 76-77V as reported by the SnapAmp on the Analog screen in KMOTION.EXE. On deceleration of an axis, especially the heavy spindle, the voltage climbs and I'm concerned it will go above 80V.
Is there anything I should/can do to increase the safety margin for the SnapAmp? For instance, enabling the voltage clamp at 80V?
i.e. in my init.c, add:
Code:
WriteSnapAmp( SNAP0+SNAP_SUPPLY_CLAMP0, SNAP_CONVERT_VOLTS_TO_ADC(80.0) );
WriteSnapAmp( SNAP0+SNAP_SUPPLY_CLAMP_ENA0,1);
WriteSnapAmp( SNAP0+SNAP_SUPPLY_CLAMP1, SNAP_CONVERT_VOLTS_TO_ADC(80.0) );
WriteSnapAmp( SNAP0+SNAP_SUPPLY_CLAMP_ENA1, 1);
Edit: I found your example at the bottom of:
Using SnapAmp
That example uses 90V as the clamp, so I presume that the SnapAmp can handle momentary excursions above 80V. Unless you have a different recommendation I'll apply the 90V clamp like shown on the above link.
Thanks!
Dave