© Siemens, 2008 SPR2-230.840.01.01.02 SIREMOBIL Iso-C
08.08 CS PS SP
Replacing boards and components 129
Page 129 of 148
For internal use only
x Unscrew the two lateral brackets from the coupling unit (3 Allen screws each,
((2/Fig. 43 / p. 128)).
x Remove the two setscrews of the coupling unit. ((1/Fig. 44 / p. 128)) shows the length
of the left setscrew. Also remove the right setscrew (not shown).
x Remove the coupling unit from the centering disk.
x Take the toothed belt off the pulley.
x Place the new belt on the pulley.
x Place the coupling unit back on the centering disk, ensuring that the shaft engages with
the intermediate piece.
x Press the coupling unit against the centering disk and screw it back on with the two set-
screws ((1/Fig. 44 / p. 128)).
x Reinstall the mounting plate including the motor. In doing so, place the toothed belt on
the pulley again, ensuring that the actual value potentiometer and its pulley are not
damaged or bent. Reconnect the motor and incremental encoder.
x Reattach the two lateral brackets ((2/Fig. 43 / p. 128)). For guidance, first insert the top
two screws ((1/Fig. 43 / p. 128)), but do not tighten them completely yet. Tighten the lat-
eral screws first, then tighten the top two screws ((2/Fig. 43 / p. 128)).
x Tension the toothed belt of the orbital drive again ((1/Fig. 45 / p. 128)). When
depressed by thumb pressure on the opposite side, the belt should give approx. 2 to 3
mm.
x Perform the mechanical settings according to the Startup Instructions, Chapter 6.
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