Centroid Community CNC Support Forum

Assuming you only want to use it for speed control, then that should work (output a value from 2048 to 4095 for 0V to +10V). My standard code is like this (having previously set "SpindleAnalogBipolar_M" per a parameter selection). ;Convert RPM to 12 bit value IF True THEN TwelveBitSpeed_FW...

No, but you don't get power for the coolant pump "out of the Allin1DC" in any circumstance. You need to find and install a suitable DC power supply, and a relay to switch it with. Then you use the Allin1DC output relay to switch the coil of the relay that in turn switches power to the pump...

Wiring the analog signal to two or three VFDs in parallel is generally not a problem.

The maximum load on the analog output for most Centroid boards is 10mA.

Typical VFD analog input impedance is 10K or higher, so the draw at 10V would usually be ca. 1mA per VFD.

If you disconnect the Acorn's analog signal from the VFD, and give a full-speed command, do you again get +10V? If not, then the Acorn's analog output section has probably been damaged in some way. If you do get +10V when disconnected from the VFD, then something about the VFD analog input is puttin...

Does your VFD really call the analog input terminal "AO1"?

That is a more common naming pattern for an analog output (e.g. speed or load monitor signal).

Helical arcs in G17, using W instead of Z, should work just fine.

Arcs in G18 or G19 will not work with the W axis. You would have to get your CAM software to post them as a series of short G1 moves instead.

You might also want to configure the machine to home using the monitoring switch as a home switch, so that machine zero on the Z axis is just below the carousel. In your tool-change macro you can set the Z+ software travel limit to a non-zero value (e.g. +2.10") to allow movement above machine ...

In that case you probably want your PLC program to trigger an immediate Fault if the monitoring switch is tripped and the spindle zero-speed signal is not closed.

You will have to look at what value you have in Machine Parameter 18.

Is there a way to see an index pulse? On the PID Configuration screen, and on the F3/Encoder screen below it, you will see an asterisk next to the axis label in the left-most column whenever the index pulse is present for that axis. The index pulse, or lack thereof, will not cause servo instability...