Figure 19
CARRIAGE
OVERTRAVEL DEPTH ADJUSTMENT
Your key machine is equipped with a depth overtravel device. Its adjustment is important. The overtravel
device prevents the cutter wheel from cutting into the vise jaws when there are no keys clamped in the machine.
Setting the depth overtravel device too high will prevent deep cuts from being made—they will not get cut all
the way down into the key blank. To adjust the depth overtravel you will need:
• Slot head screwdriver
•
7/16"
Wrench
• Three pieces of writing paper—cut to approximately 1" x 4" each.
Close both vise jaws without keys in them. Position the carriage so the stylus and cutter wheel are in about
the middle of the vise jaws—hold the carriage up against the machine during the following procedure.
Loosen the 7/16" Hex Jam Nut located at the back of the machine's main housing. See figure 20.
Turn back the 1/4"-20 slotted screw stud with your screwdriver. About 1 turn to the right as viewed
from the front of the machine. Observe that the stylus is touching the face of the closed vise jaw.
Gently turn the slotted screw stud with your screwdriver to the left as viewed from the front of the
machine and stop when you feel the stud contact the key machine's carriage—remember to be holding the
carriage up during this procedure. With the carriage overtravel just touching the carriage—and with the
carriage's vise jaws contacting the stylus continue turning the slotted screw stud an additional %turn.
The thread pitch is 20 which is approximately 12 thousandths of an inch per % turn. Tighten the 7/16"
Hex Jam Nut on the slotted screw stud—use moderate tightness.
After tightening the 7/16" nut-check the gap between the stylus and the face of the closed vise jaws.
Use three pieces of the 1" x 4" writing paper you made earlier. They equal a combined thickness of
about 9 thousandths of an inch. Readjust if necessary.
IMPORTANT: Carriage overtravel works only when adjusted properly. The following things can
happen if the adjustment is not done properly:
•
If adjusted to low your cutter wheel may cut into the right-hand vise jaw.
•
If adjusted to high your cutter wheel may not cut deep enough when cutting deep cuts in keys.
See figure 20.
16
16.
