207
9.5 F
EED
UNIT
ALS
20X
256
Unscrew setscrews [272B] from the belt
pulley [272A]. Clean threads and screw setscrews
back in with Loctite 243 Threadlock.
Place the toothed belt [272D] over the motor
pinion [272C].
Slide belt pulley into place and pull belt onto belt pul-
ley.
Turn the belt pulley in order to align one of the two
setscrews [272B] with the bevel in the
shaft [272arrow].
Aligning belt pulley and toothed belt with motor pini-
on: The toothed belt must run in the centre of the
belt pulley and motor pinion.
– (ALS 256) The belt pulley is positioned further out-
side on the shaft (approx. 1.5 mm behind the shaft
end).
Tighten setscrew [272B] to bevel, then tighten se-
cond setscrew.
Slide the motor [274A] until the toothed belt is taut.
Tighten 3 screws on the motor mount.
Connect and install the motor driver board [274D].
Fasten motor lead to housing with cable
fastening [274E].
Install casing rear wall.
9.5.2
Drive
Adjusting toothed belt tension
Open the casing - see Ch.
Loosen 3 fastening screws for the motor [274A].
Slide the motor until the belt [274B] is taut, then re-
tighten 3 screws on motor mount.
[272] Screw in one of the setscrews so that it engages with the bevel
at the end of the shaft (position of the belt pulley in ALSs 20x)
[273] Position of the belt pulley in ALS 256
[274] Adjust belt tension; connect and fit PCBs
A
B
D
C
A
approx. 1.5 mm
D
A
C
B
Summary of Contents for ALS 204
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