Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 111)

Home Parameters
Chapter 5
5-9
Manual Homing Sequence in Home Mode
The following outlines a manual homing operation for systems with DCMs
when you set the Jog Select Switch to “Home”.
1. Assuming you are using the standard MTB Panel, set the Mode Select
switch to “Manual”. Once the switch is set, set the Jog Select switch
to “Home”.
2. Press the appropriate Axis/Direction button to move the DCM axis
across three consecutive markers. Initial speed for this move can be
selected through the use of the jog speed and feedrate override
switches.
Once the homing sequence is initiated, the jog speed switch has no
effect on the axis speed. However, the feedrate override switch still
effects speed.
After the axis passes three consecutive markers, the axis stops. Here,
the control waits until the following error is within the range
specified in the Inposition Band parameter (refer to page 7-35).
Once the axis is within inposition, the control recalculates the
absolute axis position, based on the position after the axis crosses the
three consecutive markers added to the value in Machine Pos. at
DCM Scale 0.
New Abs. Pos. = DCM Physical Abs. Pos. + Machine Pos. at DCM Scale 0
Important: Use Machine Pos. at DCM Scale 0 to determine the
coordinate value at the actual zero marker on your linear scale. This
parameter shifts the scale’s machine coordinate system so the value entered
becomes the actual value of the zero marker. For more information about
this parameter, refer to page 5-23.
Manual Homing Sequence in Continuous or Incremental Mode
The following outlines a manual homing operation for systems with DCMs
when you set the Jog Select Switch to “Continuous” or “Incremental”.
1. Assuming you are using the standard MTB Panel, set the Mode Select
switch to “Manual”. Once the switch is set, set the Jog Select switch
to “Incremental” or “Continuous”. Speed for this move can be
selected through the use of the jog speed and feedrate override
switches.
2. Press the appropriate Axis/Direction button to move the DCM axis
across three consecutive markers.