× Forum Header

Where do I get the pwm rate from?

More
25 Nov 2021 02:50 - 25 Nov 2021 03:04 #227552 by PhilipME
The actual spindle speed does not mach the m3sxx command in the MDI terminal

Where do I get the pwm rate from?
I have the bob in the picture  (If it is needed for determining the pwm rate entry in the stepconf spindle page ! )


question 2 for calibration:
do I need to measure the 0-10 volt and if it is for example 1 volt, then for calibration I enter pwm signal as 0.1 and take the reading from the spindle vfd of the speed say 40 herts = 2400 rpm

and the second point for example 9.8 volt means pwm(The maximum the bob gives)  = 1 and the rpm is 24000 rpm for the second point.

Is my understanding correct?


 
Attachments:
Last edit: 25 Nov 2021 03:04 by PhilipME.

Please Log in or Create an account to join the conversation.

More
30 Nov 2021 13:53 #228003 by andypugh
You shouldn't need to measure anything to calibrate it. 100% pwm should run the VFD at the programmed max speed.
So, set the pwmgen scale to the max speed, and connect it to the correct rpm HAL pin and the motor speed should match the commanded speed,

Note that the BoB will not generate 0-10V without 12 to 24V on the 12-24V power supply pins.

Please Log in or Create an account to join the conversation.

Time to create page: 0.173 seconds
Powered by Kunena Forum