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I'm installing a 20w laser on my CNC and I control the power of laser using the spindle pwm. The software LightBurn use M67 to control the laser power. I modify the HAL file to connect  analog-out-00 to the spindle PWM and set the scale. The laser is ok and the power change. Can i use the slide of spindle override to increse and reduce  the new laser signal ????  I'm not expert to configure linuxcnc. 

I’m about to start virtually the same conversion on my Shizuoka ST-N, has the same Bandit and motors. Do you still have that documentation available? The above link doesn’t seem to work.

I really appreciate the insight. I initially thought it might be a brake resistor but the 'dynamic braking package' on page 88 is only listed as an option for the larger 7.5-20HP inverters whereas this is a 5HP model. I've put in a request with TB Woods and Vacon but this is a 12 yr old, discontinued and obsolete product...