Configure Motor Homing

Motor homing establishes a known machine-coordinate reference so soft limits and work offsets are meaningful. Set your Machine Profile (bottom-right) to a Mach4 release to see the version-correct procedure.

Shared: Disable machine motion

Danger

Before changing motor configuration, disable machine motion and confirm the E-stop is engaged. Unexpected motion can cause injury or damage.

Identify the pendant controls

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123

1. 1Axis select rotary switch
2. 2MPG hand wheel
3. 3Feed-rate / enable buttons

Wireless MPG pendant, homing-relevant controls

Homing procedure

Galileo and older

For Galileo and earlier, home each axis individually from the Diagnostics tab, then confirm the machine-coordinate readout resets to zero at the home switch.

Since Unimate

Unimate and newer add a one-touch Home All sequence that orders the axes automatically using the configured homing priorities.

Set the homing speed

275 Homing Speed (%) percent · default 20

Percentage of maximum axis velocity used while seeking the home switch.

Machine types: mill, router, lathe, grinder

Machine-type specifics

For grinder

On grinders, home the wheel-dress axis before the work axes so the dresser cannot collide during the reference move.

For router

On routers with a floating Z reference, verify the tool-length touch-off plate is clear before homing Z.

If the controller does not respond

Shared: Restart the controller

1. Save any open configuration.
2. Close Mach4.
3. Power-cycle the motion controller and wait for the status LED to turn solid green.
4. Reopen Mach4 and confirm the controller reconnects.