Castle TSM-21 Serial 61064 and lower (Mead) Operator Manual User Manual
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The pocket is being cut and the drill comes up but
doesn’t finish the pilot hole
There are two possible causes of this issue. Either a switch has failed or the air pressure driving
the carriage has been compromised. To determine the cause of the problem, cycle the machine
until it stalls out during the drill phase.
Push the carriage by hand (you can access the carriage through the back door.)
If the cycle finishes when pushed manually then you have an air pressure issue.
If the drill stays out and you can’t get it to finish when pushed by hand then you need to
replace the end of drill switch.
Drill Stop Switch
Solution Steps:
Figure 18
The drill stop switch is a magnetic switch that consists of a magnetic actuator on one side (no
wires) and a magnetic reed switch on the other (with wires). (Figure 18) When the carriage
reaches the end of the drilling phase the switch signals the air to stop flowing into the drive
cylinder. If the switch is bad or the magnet has lost some of its potency then the machine will not
sense the end of the drill cycle properly and the drill will stay out. The drill stop switch holds a
closed circuit until the carriage comes forward and interrupts the magnetic field.
Disconnect power and air.
Test for continuity at the switch by connecting the ohmmeter leads to the reed (wired)
switch side of the assembly. When the magnet (no wires) is placed against the reed
switch then continuity should be registered.
If no continuity is registered then the reed switch needs to be replaced.
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