MLS MMLS3, Operator'S Manual

Page: 27 / 48

MLS Test Systems Pty Ltd
Revised: April 2013
25
Should the gaps need adjustment, proceed as follows:
Note: The following procedure assumes that the upper guide
rail ends have not been disturbed and can serve as
reference for the position of the drum. If this is not
true, the drum has to be re-aligned as described under
4.3 below.
4.3.1 On the pulley side, remove the safety cover and release the three
M8 nuts (13mm spanner) on the upper Vesconite slide. (Nuts
G, E & H on fig 6.). Push down the slide to take up any
clearance and retighten the nuts. Repeat on the other side of
the machine.
4.3.2 Release the four M10 nuts on the bearing plate (A, B, C & D), .
Release the lock nuts on the set crews (P & Q) at the bottom of
the bearing plate. With a feeler gauge measure the gap between
the drum and the upper guide rail end. Adjust it to between 0.2
and 0.5mm at the narrowest position by turning the set crews.
It may be necessary to slack off the setscrews and push the
bearing plate downward to increase the gap. Tighten all the
nuts. Lock the setscrews
Repeat on the other side.
4.4 Aligning the drive drum
Note: This procedure should only become necessary under exceptional
conditions. It is suggested that the manufactures be contacted
before it is undertaken
Refer to fig. 6.
The chain of bogies and link sections are driven around by the drive
drum which drives the guide wheels. This is done by pinching some of
the guide wheels between the rotating drum and the outer rail and driving
them forward like in a planar gear system. It is important that the two
wheels on the same axle are gripped simultaneously and released
simultaneously.