Instruction manual

4–12
Adjustment Procedures
Platen Gap Adjustment (Figure 4–5)
IMPORTANT
Only do this procedure if the original equipment shuttle frame assembly
or platen has been replaced by a new or refurbished unit.
1. Prepare the printer for maintenance (page 4–2).
2. Open the printer cover.
3. Remove the shuttle cover assembly (page 5–16).
4. Remove the ribbon.
5. Loosen the platen open belt (page 4–6, steps 3 and 4).
6. Raise the forms thickness lever (1) to the fully open position.
CAUTION
Do not force the platen against the feeler gauge. Damage to the hammer
tips will result.
NOTE: The platen gap on the LG04 printer (0.011 inch) differs from the
platen gap on the LG06 printer (0.010 inch).
7. Insert a 0.011 inch (0.28 mm) flat feeler gauge (2) straight down between
the hammer bank cover plate (3) and ribbon mask (4), within four
hammer positions of the left end of the hammer bank.
CAUTION
Adjust the platen set screws less than 1/4 turn on one side, then check
the other side. Adjustment sensitivity is approximately 0.03 inch per
revolution of the set screw. Also, insert the feeler gauge no more than 2
inches down from the top of the ribbon mask.
8. Gently close the forms thickness lever (1). As the platen is closing,
gently slide the feeler gauge up and down, keeping it between the
hammer tip and ribbon mask. If the feel is too tight when the platen is
being closed, adjust the set screw (5) at the end of the platen
counterclockwise. If the feel is too loose, adjust the set screw clockwise.
With the forms thickness lever closed all the way, the feeler gauge should
contact both the tips and the ribbon mask and move with light friction.
Shift the gauge slightly to verify.