M21-M25 Optional User M Function with M-Fin

Next Generation Control Mill Operator's Manual

The Online Interactive Operator's Manual is currently available in English only.

A PDF version of the Operator's Manual is available for download in multiple languages. Click the link below to view the Operator's Manual in your language. Click "Continue" to view the online version in English.

Get a translated PDF Download Continue

M21 through M25 are for user-defined relays. Each M-code closes one of the optional relays and waits for an external M-Fin signal. RESET stops any operation waiting for a relay-activated accessory to finish. Also, refer to M51 - M55 and M61 - M65.

Only one relay is switched at a time. A typical operation is to command a rotary product. The sequence is:

  1. Run the machining portion of a CNC part program.
  2. Stop CNC motion and command a relay.
  3. Wait for a finish (M-Fin) signal from the equipment.
  4. Continue the CNC part program.

The M-Fin connector is at P8 on the I/O PCB. Refer to the description below for a diagram and pinouts.

M-code Relays

The M-code relays are in the lower-left corner of the I/O PCB.

These relays can activate probes, auxiliary pumps, clamping devices, etc. Connect these auxiliary devices to the terminal strip for the individual relay. The terminal strip has positions for, Normally Open (NO), Normally Closed (NC), and Common (COM).

Main I/O PCB M-code Relays.

M-Fin Circuit at P8 on the Main I/O PCB. Pin 3 is the M-Fin input and interacts with input number 18 in the control. Pin 1 is the M-Fin output and interacts with output number 4 on the control.

Optional 8M-code Relays

You can purchase additional M-code relays in banks of 8.

Only the outputs on the I/O PCB are addressable with M21-M25, M51-M55, and M61-M65. If you use an 8M relay bank, you must use M29, M59, and M69 with P codes to activate the relays on the bank. The P codes for the first 8M bank are P90-P97.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.