About Spindle Acceleration Deceleration Ramp

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01 May 2019 14:28 #132439 by marq_torque
Hello Everyone,

I am configuring C axis in lathe with Servo Spindle, i have used high power 3KW servo motor for main drive which will run Speed and Position mode

By default it will stay in position mode, as soon as it receives M3/M4 output it switches to Speed mode and works as normal lathe spindle and when M5 is issued that output will be off, so servo will locking immediately without any smooth deceleration, so that is the problem it will obviously jerk and trigger over load error.

I am looking for smooth ramp for spindle start up and slow down, i have setup similar in Mach3 it was having those spindle on off delay so it was working normal.


Any workout on this available ?? i looked into but found no parameters for Spindle acceleration/deceleration.


Thanks,
Ankit

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01 May 2019 14:33 #132440 by marq_torque
I am currently using 0-10V PWM to analog output via on board par port.

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01 May 2019 16:27 - 01 May 2019 18:19 #132448 by PCW
This is often done by using the limit3 component to bound the acceleration of the commanded spindle speed

loadrt limit3
addf limit3.0 servo-thread

setp limit3.0.maxv 250 # 250 RPM/second
setp limit3.0.enable true
net your_commanded_spindle_speed_signal => limit3.0.in
net your_analog_spindle_command <= limit3.0.out
Last edit: 01 May 2019 18:19 by PCW. Reason: fix pin name
The following user(s) said Thank You: marq_torque

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03 May 2019 04:53 #132599 by marq_torque
Much Thanks for input,

Does this works for deceleration also ??

Regards,
Ankit

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03 May 2019 06:26 #132603 by pl7i92
if you are not in safty concern or tool Change need just let it run out the 10seconds it needs
it will give you a very long live

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