OPTALIGN smart RS5 BT handbook
86
5 .13 .1 Shim first
It is recommended to perform vertical corrections first, since the horizontal
condition is easily affected by the process of loosening anchor bolts and inserting/
removing shims, whereas the vertical condition is less prone to being affected
when performing horizontal moves. You may need to recheck soft foot before
proceeding.
5 .13 .2 Preparation and shimming
1. Prepare the machines for shimming by ensuring the following:
The foot bolts are clean, intact and removable.
Soft foot has been eliminated (refer to section 5.17).
The feet have enough shims under them should lowering the machine be
necessary.
Good quality shims such as PERMABLOC, MYLAR or LAMIBLOC are available
from PRÜFTECHNIK Condition Monitoring. (Visit www.pruftechnik.com for
details.)
2. Loosen foot bolts while trying to avoid moving the machine horizontally. If any
foot comes off the ground when loosened, suspect soft foot.
3. Use the vertical foot position values to shim BOTH front and back feet pairs as
required. Positive feet values indicate that the feet are high and therefore shims
should be removed, while negative feet values indicate that the feet are low and
suggest addition of shim thickness.
4. Retighten and remeasure to verify vertical results and determine the exact
alignment condition.
Note that vertical shimming can also be carried out with the Live vertical Move.
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