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OpenBuilds BlackBox includes a 0-10v Analog Signal Voltage output that can be used to control spindles/other toolheads that need a 0-10v signal to run.
NB Note this is a low level logic Signal voltage, it should not be used to drive anything directly. This signal should be connected to an external drive system, for example a VFD or a DC Spindle Controller.
Using our generic ferule cable, you will need to connect the black cable to the ground and the red cable to the 0-10v subport using the terminal connector provided by OpenBuilds.
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Change your grbl setting for max rpm ($30=24000)
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To Activate and test the signal, send a M3 S12000 via the mdi screen, and test with a multimeter, it should read 5v. Inputting that same command with the spindle and vfd hooked up should net you 12k rpm +/- ~150 rpm.
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You may need to hit the green run button to put the VFD in a run state.
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Calibrate output voltage
TIP: You may need to fine tune the output to be exactly 10v:
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Send an M3 S24000 to the controller.
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Measure the voltage between GND and the 0-10v Terminal
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Use a small flat head screwdriver to adjust the 0-10v Fine Tuning Adjustment until the output is exactly 10.0v
This will ensure that command Spindle RPM is as close to the actual as possible
Information derived from docs:blackbox-x32:connect-vfd [OpenBuilds Documentation] and customer feedback.
