OKIDATA ML320 Turbo Service Manual page 93

Adjustment method
(1) Gap between the platen and the printhead at the left end and the right end shall be adjusted by rotating
the adjust cam.
(2) Set the adjust lever at the Range: 1. Press the adjust gear downward (indirection A) to push the adjust
gear and the adjust gear out of mesh.
(3) Adjust the gap by rotating the adjust screw in direction B or C while the adjust lever and the adjust gear
are disengaged.
(4) After adjustment, mark the adjust cam position with a red pen. 0.41±0.03 mm
2) Initial adjustment
Note 1) The head gap shall be measured with the change lever set to rear position.
Note 2) The head gap shall be measured positioning the platen gear (R) craw on the top.