Limits And Homing Setup - MachMotion Apollo III Manual

4 LIMITS AND HOMING SETUP

The Apollo III motion controller has up to 16 inputs that can be used for the limit and home switches. To maximize
the number of inputs available for other functions, wire multiple switches in series as shown below.
X-D Y-D Z-D A-D B-D C-D
X-S Y-S Z-S A-S B-S C-S X0
GND GND GND 5V 5V 5V
Note: For the highest level of safety,
The standard limit input allocation is show below.
To set up and wire 24V limit/home switches, follow the steps outlined below.
1. Pick two limit switches closest to the end of the axis' maximum and minimum travel.
2. Wire the two switches normally closed in series as shown in Figure 24.
3. Wire the remaining side of the first switch to C0+ from the Apollo III motion controller.
4. Wire the remaining side of the limit/home switch into the correct input (see Table 5) depending on which
axis is being wired.
5. On the menu bar at the top of the screen select Config->Ports and Pins.
6. Click on the Input Signals tab (See Figure 25).
7. Enable the limit and home switches by clicking the red [X] by the signal to make it a green check.
Note: Each axis has three signals the max travel (X++), the min travel (X--), and the home (X Home). All
three must be enabled and set to the correct port and pin address for everything to work correctly using the
8. Set the Port Number and Pin Number to the desired input. All input signals use port 11 and the pin
number corresponds to the X number it is wired to (Ex. An input wired into X3 will have a port number of
11 and a pin number of 3).
9. Set up the active low checkbox to a green check.
Note: Under the active low column the active state can be changed by clicking on the [X] or check mark. If
the limit switches are normally open the red X mark should be used. However, this is not recommended as it is
10. When the limit and home switches are completely configured, press [Apply] and then [OK].
C0- C0- C0- C0- C0- C0- C0- C0+ C0+ C0+ C0+ C0+
X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11
X0L X1L X0L X3L X4L X5L X6L X7L X8L X9L X10L X11L X12L X13L X14L X15L C0- GND
FIGURE 24 LIMIT SWITCHES IN SERIES
Axis Input Number Axis Input Number
X
Y
Z
TABLE 5 INPUT PORT AND PIN NUMBERS
C0+ C0+ C0+
X12 X13 X14 X15 C0+ 24V
wire the limit switches Normally Closed.
X1 A
X2 B
X3 C
wiring description above.
not as safe.
Apollo III Using Mach3
LS1 LS2 & Home Sw
X4
X5
X6
P a g e | 25