Table of Contents

1 MPG Pendant

This example is to explain how to hook up the common MPG pendants found on the market place today. This example uses a MPG3 pendant and a C22 pendant interface card from CNC4PC connected to a second parallel port plugged into the PCI slot. This example gives you 3 axis with 3 step increments of 0.1, 0.01, 0.001

In your custom.hal file or other .hal file add the following making sure you don't have mux4 or an encoder already in use. If you do just increase the counts and change the reference number. More information about mux4 and encoder can be found here [->] and here [->].

# Jog Pendant
loadrt encoder num_chan=1
loadrt mux4 count=1
addf encoder.capture-position servo-thread
addf encoder.update-counters base-thread
addf mux4.0 servo-thread

# If your MPG outputs a quadture signal per click set x4 to 1
# If your MPG puts out 1 pulse per click set x4 to 0
setp encoder.0.x4-mode 0

# For velocity mode, set n to 1
# In velocity mode the axis stops when dial is stopped even if that means
# the commanded motion is not completed,
# For position mode (the default), set n to 0
# In position mode the axis will move exactly jog-scale
# units for each count, regardless of how long that might take,
# This must be set for each axis you want to behave other than default
setp axis.N.jog-vel-mode n

setp mux4.0.in0 0.1
setp mux4.0.in1 0.01
setp mux4.0.in2 0.001
net scale1 mux4.0.sel0 <=
net scale2 mux4.0.sel1 <=
net pend-scale axis.0.jog-scale <= mux4.0.out
net pend-scale axis.1.jog-scale
net pend-scale axis.2.jog-scale
net mpg-a encoder.0.phase-A <=
net mpg-b encoder.0.phase-B <=
net mpg-x axis.0.jog-enable <=
net mpg-y axis.1.jog-enable <=
net mpg-z axis.2.jog-enable <=
net pend-counts axis.0.jog-counts <= encoder.0.counts
net pend-counts axis.1.jog-counts
net pend-counts axis.2.jog-counts