wolke m600 basic - Fig. 14_244: External Circuitry for Shaft Encoder of Other Manufacturers with

Technical data
170 Manual m600 basic 2.6_01
14
Slippage on the pulse generator wheel on the pulse generator
If the pulse generator is not pressed onto the conveyor belt with enough
pressure or is in contact with a very smooth surface (e. g. belt driving roll-
er), the pulse generator may occasionally slip and the m600 basic will then
receive incorrect speed information. In the print image this is apparent in
stretching in the print direction and an offset at the print head transition
points. Another problem occurs whenever heavy products are on the belt,
causing the pulse generator to jump off. In the print image this is appar-
ent in drop-outs and offsetting. If the pressing pressure on the belt is ex-
cessive, however, this may destroy the pulse generator bearing.
Pulse generator
socket
Insufficient number of pulses per revolution (less than 500)
If you print with a low belt speed or the belt is accelerated or slowed down
during printing, it is possible that the automatic adjustment of the printing
speed may not be fast enough. This will result in an imprecise print image
(stretching, compression, offsetting at the transition points between the
print heads if several print heads are used). If the speed of the belt is too
slow the m600 basic interprets this as a stop. For very slow belt speeds it
is therefore advisable to use a pulse generator with a large pulse/revolu-
tion ratio.
Fig. 14_244: External circuitry for shaft encoder of other manufacturers with
deviating voltage ratings