Field Service Manual December 2003
Page 49 of 276
• When the stepper is activated with the 4 sfdrel command then the stepper is
against the v-belt and when you hold the ERTA gear wheel, the V-belt may not
slip.
Motor and pulley are dynamically balanced : Please do not change pulley between
motors because this can cause severe vibration problems
The motor can be lowered or raised to get more or less tension in the belt. Too much
tension causes vibrations, insufficient tension causes slip when accelerating or
braking, causing heat dissipation and noise. The motor must be positioned so that the
belt can easily be pushed in by 1 cm.
Adjust the reed switch of the stepper motor when the stepper is in his home position.
Again this should give a short circuit checking it with a ohm meter or displaying a
zero as result by typing the command “1 FEEDET .” in LTL. Adjust it in such a way
the detection is positioned in the middle of the detection area.
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