User manual

TMCM-1180 and PD86-1180 Hardware Manual (V1.03 / 2011-DEC-02) 15
Copyright © 2011, TRINAMIC Motion Control GmbH & Co. KG
4.3.5.1 Left and right limit switches
The TMCM-1180 can be configured so that a motor has a left and a right limit switch (Figure 4.9).
The motor stops when the traveler has reached one of the limit switches.
left stop
switch
right stop
switch
REF _ L _x
REF _ R _x
motor
traveler
Figure 4.9: Left and right limit switches
4.3.5.2 Triple switch configuration
It is possible to program a tolerance range around the reference switch position. This is useful for a triple
switch configuration, as outlined in Figure 4.10. In that configuration two switches are used as automatic
stop switches, and one additional switch is used as the reference switch between the left stop switch and
the right stop switch. The left stop switch and the reference switch are wired together. The center switch
(travel switch) allows for a monitoring of the axis in order to detect a step loss.
left stop
switch
motor
traveler
REF _ L _x
right stop
switch
REF _ R _x
reference
switch
Figure 4.10: Limit switch and reference switch
4.3.5.3 One limit switch for circular systems
If a circular system is used (Figure 4.11), only one reference switch is necessary, because there are no end-
points in such a system.
motor
ref switch
REF _ L _ x
eccentric
Figure 4.11: One reference switch