Replacing boards / replacing components 6 - 43
Siemens AG SPR2-230.061.01 Page 43 of 48 SIREMOBIL Iso-C
Medical Solutions Rev. 13 12.04 CS PS 24 System Manual
• Remove the two setscrews of the coupling unit (1/Fig. 20) shows the length of the left
setscrew. Also remove the right setscrew (not shown).
• Remove the coupling unit from the centering disk.
• Take the toothed belt off the pulley.
• Place the new belt on the pulley.
• Place the coupling unit back on the centering disk, ensuring that the shaft engages in the
intermediate piece.
• Press the coupling unit against the centering disk and screw it back on with the two set-
screws (1/Fig. 20).
• Reinstall the mounting plate incl. 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.
• Reattch the two lateral brackets (2/Fig. 19). For guidance first insert the top two screws
(1/Fig. 19), but do not yet tighten them completely. Tighten the lateral screws first, then
tighten the top two screws (2/Fig. 19).
• Tension the toothed belt of the orbital drive again (1/Fig. 17). When depressed by thumb
pressure on the opposite side, the belt should give approx. 2 to 3 mm.
• Perform the mechanical settings according to the Startup Instructions, Chapter 6.
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