Y-E Data YD-380 - Page 31

c) Compensation (for humidity only)
Humidity Compensation
Ph = B x (h - 50)
Where h
is ambient humidity (%RH)
B • +0.25 um / %RH =Compensation Coefficient
Compensated Positioning Error
PO • P + Ph • P + 0.25 (h - 50)
Example:
If h • 70% RH, PO = P + 0.25 (70 - 50)
• p + 5 um.
4.14.2 Removal and Replacement
1. Remove the PWB. (See 4.1)
2. Disconnect the J4 connector from the PWB. Remove the
head cable from the groove in the carrier base.
3. Take out the Ready/Off plate screws and remove the Ready/
Off plate. (See figure 4.10.1)
4. Remove the stepper. (See 4.13.2)
5. Remove the long guide bar clamps (two locations) and
lift out the head/carriage assembly and guide bar
together.
6. When reassembling, reverse the above procedure.
CAUTION
When reinstalling, be careful not to push on the
,
head arm hanger of the head/carriage assembly.
4.14.3 Position Check
1. Make sure the gap between the unloaded read/write heads
is within 0.3 to 0.7 mm. (See 4.10.3)