Sirs,
New question and update to this older post. I have purchased a new ALLN1DC board for a Lathe and finally got to installing it this week . Upgraded to CNC12 also this week. I am re-using a M400 Cabinet that was originally on a 3 axis Cleaveland Mill with an Automatic Tool Changer. I am using the Mitsubisi Frequal A-500 VFD that was originally factory installed in the M400 cabinet. The original Mill Spindle Motor had a motor encoder in it. The Lagun CNC Lathe that I am setting this system up on has the original Kurdoa Model #Pulcen A86L-0027-0001 spindle encoder (see pictures from previous post).
The previous mill set up in this cabinet has a parallel set of wires running from the spindle motor encoder to the VFD as well as to the original ALLN1DC Board. See Attached Picture, Upper LH side of VFW.
Picture of original M400 Schematic showing encoder wires going to the VFD
None of the current You Tube set up videos or the new ALLN1DC schematic drawings show this type of connection on the VFD. They only show the spindle encoder going to the 9 pin connector on the ALLN1DC board. Have the electronics improved so these dual connections are not required? Can we eliminate this extra connection to the VFD?
Thank you,
Tim
Sirs, I forgot to add that I have a new system serial number for this system Model T39 Serial #A900899. This will be replacing the serial #6942 that is on the original M400 ATC cabinet.
Thank you,
Tim
The reason the spindle encoder on the ATC mill control went to the Mitsubishi A500 drive, is that the Mitsubishi drive used it to orient the spindle during tool changes.
If you do not require spindle orientation capability, then you can wire your encoder directly to the Allin1DC instead.
Assuming your lathe spindle motor does not have its own encoder, you may need to change some parameters in the Mitsubishi drive so it does not attempt to use "PLG feedback" for speed or position control. You will have to review the Mitsubishi A500 and A5AP manuals to sort that out.
CNCSNW,
Thank you for the information. Once I read your response the dual spindle encoder makes more sense. I will pass this on to my electrical friend that is helping me. We have downloaded the Mitsubishi manual.
Thank you!
Sirs,
New Question;
Off topic from the previous question, but same machine. We are running the spindle motor with a VFD. This lathe also has a small 1/8 hp, 3 phase headstock lube pump that runs the oil pump to provide oil flow to the headstock while in opperation. We need a signal from the ALLN1DC to run a relay for this small motor every time the main spindle motor is running. Would #7 the spindle enable output be a source for this relay with out causing the VFD problems?
Thank you,
Tim Lovely
I would not recommend powering a relay coil with the VFD sequence supply (e.g. OUT7).
If you were critically short of outputs, you could wire OUT7 to control only a double-pole relay, and use one pole of the relay for the VFD sequence command, and the other pole for your lube pump starter coil.
It would be better, though, to just assign an unused output for the spindle lube pump.
E.g.:
Guy's,
Getting close to getting the lathe up and running, hopefully toight. Quick question. On the new ALLN1DC in ther limit switch inputs, we have a X Home. Where does the input go? Do we need that input?
Thank you,
Tim Lovely
You need a separate minus limit switch and plus limit switch.
You do not need a home switch in addition to those two. Centroid will home using the limit switch, in the selected direction.
On machines where there was previously a single limit switch that tripped at both ends, plus a home switch that tripped only at one end, you generally want to turn the home switch into your second limit (and perhaps move the trip dogs around to retain full travel, and ensure the former limit can no longer trip at the former home end).
When turning a home switch into a limit switch, if the home switch was normally-open in the original configuration, you will need to re-wire it to use normally-closed contacts instead.