Using Mach 3, Version R3.042.020
Using xylotex XS-3525/8S-4
Using cnc4pc C11 board
Using Harbor Freight Mini-Mill (44991) with stock DC motor
I'm attempting to calibrate the spindle speed after discovering the speed was way off following the purchase of a hand-held tachometer.
Checked the "Spindle Pulleys" from the Configuration Drop down.
Set to Pulley Number 1, min 500, max 1800, ratio 1
Select Okay
Went to the settings tab and verified on Pulley 1.
Went to Function Cfg's, Calibrate Spindle
Set the control to 500
Pressed Spindle on/off and checked speed with tachometer
Getting a reading of 2000 rpm!
Went back to "Spindle Pulleys" from the Configuration Drop down.
Changed the ratio to 0.25
Select Okay
Went to Function Cfg's..> Calibrate Spindle
Set the control to 500
Pressed Spindle on/off and checked speed with tachometer
Still getting a reading of 2000 rpm!
I've restarted Mach3, I've saved settings, etc., but I can't seem to get the changes to take place.
Not sure how the AutoCal works since I don't have any feedback to system regarding RPM. I did note that when selecting AutoCal the software does in fact cause the speed to increase gradually, but I always stop before it ends due to the latter reason.
On the motor tuning of the spindle, I have:
Steps per: 1000
Velocity: 1500
Accel: 161.25
Step Pulse: 4
Dir Pulse: 4
Odd thing is, I can't change the Velocity. I can type in new numbers but when I click somewhere else on the dialog, the number reverts to 1500.
On the Ports and Pins, Spindle Tab:
Motor Control is set to Use Spindle Motor Output and Step/Dir. If I disable it, I can't get the spindle to turn at all.
"ModBus Spindle - Use Step/Dir as well" is disabled
"Special Functions - Use Spindle Feedback in Sync Mode" is disabled
Any help would be appreciated!
Happy New Year 2011,
Vogavt