Spindle speed scaling
13 Mar 2019 11:16 - 13 Mar 2019 11:16 #128501
by andypugh
Replied by andypugh on topic Spindle speed scaling
There does seem to be some invalid assuming going on in the gs2 driver:
I think that check for haldata->motor_RPM > 5000 is spurious and is what you would need to change.
Then you should be able to set the nameplate-RPM to the correct number.
It doesn't seem to be enforcing a max limit on Motor Hz.
if (haldata->motor_hz<10)
haldata->motor_hz = 60;
if ((haldata->motor_RPM < 600) || (haldata->motor_RPM > 5000))
haldata->motor_RPM = 1800;
hzcalc = haldata->motor_hz/haldata->motor_RPM;
retval = modbus_write_register(
mb_ctx,
slavedata->write_reg_start,
abs((int)(*(haldata->speed_command)*hzcalc*10))
);I think that check for haldata->motor_RPM > 5000 is spurious and is what you would need to change.
Then you should be able to set the nameplate-RPM to the correct number.
It doesn't seem to be enforcing a max limit on Motor Hz.
Last edit: 13 Mar 2019 11:16 by andypugh.
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13 Mar 2019 12:54 #128511
by thadwald
Correct; It doesn’t limit the speed at all. All this seems to do is set up the number of poles on the motor
Replied by thadwald on topic Spindle speed scaling
I think that check for haldata->motor_RPM > 5000 is spurious and is what you would need to change.
Then you should be able to set the nameplate-RPM to the correct number.
It doesn't seem to be enforcing a max limit on Motor Hz.
Correct; It doesn’t limit the speed at all. All this seems to do is set up the number of poles on the motor
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