Specifications

Southwestern Industries, Inc.
ProtoTRAK SMX K2, K3, K4 & Retrofit Safety, Installation, Maintenance, Service & Parts List Manual
115
Once the head has been trammed tighten the three bolts. Be careful not to move the head
while tightening. Tighten the bolts a little at a time. (Note: the head must droop down
rather than up because tool pressure will take care of the extra 0.0005”.)
5.2.4 Limit Switch Option
See figures 64 and 65 in section 7.
The limit switch option design was changed from when we first released the SX control.
Early limit switch kits came with a single input limit switch as shown in the figure.
Figure 45 – 1 Input Limit Switch
# Part Number Description
1
16117
Limit Switch Assembly with cable
The latest design consists of a limit switch with 2 inputs as shown in the figure. This means
1 input for each direction. On machines with electronic handwheels, when you hit a limit
the EHW will only allow you to move the machine in the direction away from the limit
switch. This will prevent the user from damaging the machine by hitting a hard stop.
Figure 45-1– 2 Input Limit Switch
Part number – 22408
# Part Number Description
1 22408 Limit Switch (no cable)
2
22551-1
Limit Switch Assembly with cable – right
3 22551-2 Limit Switch Assembly with cable – left