ELNA E9020 - Belt Tension Adjustment; Origin Adjustment for Drives

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2 Adjusting the belt
When the STM or the like has been replaced, it is necessary to adjust the belt tension. Perform the adjustment as shown in the figure below.
1 Remove the belt holder. (One screw)
2 For the proper belt tension, adjust the respective pulleys (asm.) so as to obtain the deflection described in the table below when a load of 0.98 N (100 g) is applied to the
midway of the belt, and tighten screws (two screws).
3 Adjusting the origin
[X origin]
Insert a gauge of 1 mm between the X drive felt B and the X drive shaft holder
presser, and adjust so that the X detecting switch (asm.) is turned ON when the X
drive plate (asm.) is shifted in the direction of the origin.
Clearance gauge of 1mm
X drive shaft
felt B
X detecting switch (asm.)
X drive drive shaft
holder presser
X drive plate (asm.)
Main frame (asm.)
A m/m
0.98 N
(100g)
Belt
Pulley (asm.)
Y belt
presser
Clearance gauge
of 1 mm
• If the belt is excessively tensed, the STM will step out.
• If the belt is insufficiently tensed, the belt will move lightly but skipping will occur.
• Before starting to adjust the belt, check the frame holder (asm.) and Y drive shaft, and X drive plate(asm.)
and X drive shaft. (Standard :The drive shafts need no lubrication. They automatically drop (slide)
when they are inclined by 45fl.)
Y detecting switch (asm.)
[Y origin]
Insert a gauge of 1 mm between the frame holder (asm.) and the Y drive shaft felt A,
and adjust so that the Y detecting switch is turned ON when the frame holder (asm.)
is shifted in the direction of the origin.
Components to be adjusted
X pulley (asm.)
Y pulley (asm.)
Y intermediate pulley (asm.)
X drive belt
Y drive belt
Y drive belt
A (deflection) mm
3.5 to 4.5
3.5 to 4.5
2.5 to 3.5