Application Note
How-To Document
Problem Description
Replacing the Depth Limiter.
Requirements
ProtoMat Machine, BoardMaster Software, a 3 mm Allen wrench, a 2.5 mm Allen wrench (for earlier
model machines).
Problem Solution
1) The first thing we will need to do is to remove the tool from the collet. In BoardMaster, select
Goto/Exchange.
2) Remove the tool from your collet.
3) Now we must raise the entire motor so we can remove the Depth Limiter.
pictures below to determine what to loosen to raise the motor.
91S/HS
92S (after 1997)
92S/HS
C30
C30/S
M30
&
M30/S
Please use the
You must loosen all 5 of
these screws to move the
motor up and down.
This is the quick change tool bar.
You might have to remove this to
raise the motor enough to allow
the removal of the depth limiter.
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Application Note
95SII
101 Hi-P
&
Automill
This collar is set at the factory, however,
if you need to lower the motor, you must
loosen the set screw on this collar.
Loosen these two screws to
raise the motor.
91S/VS
C60
93S
M60
&
C100/HF
Loosen these two
screws to raise and
lower the motor.
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Application Note
4) Loosen the appropriate Allen screws based on the pictures above and raise the motor so the
motor won’t inhibit the removal of the depth limiter. Lightly tighten the Allen screws so the
motor will stay at this position. (If you were able to identify your motor holding device based on
the above pictures please proceed to Step 6)
5) Machines with the following style motor holding device must be raised in a different fashion.
Remove this 7 mm
Remove these two 3 mm
Allen Screws.
Remove this 3 mm allen screw
and you will be able to
remove the piece below.
Remove this
side of the
vacuum hose.
Look into the Depth Limiter and you
will be able to see 4 2.5 mm allen
screws. Remove these 4 screws. In
order get the allen wrench to each of
these screws, you must spin the Depth
Limiter around taking out one screw at
a time. Once the all the screws are
loose, gently pull up on the motor and
slide the Depth Limiter out. (Please
proceed to Step 8)
2.5 mm allen screws (4)
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Application Note
6) Loosen the following screws to remove the Depth Limiter.
Do not adjust
these screws
Remove the 3mm allen
screw located here.
Remove the vacuum hose.
Remove the second 3 mm
allen screw located here.
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Application Note
7) Slide the Depth Limiter away from the head. Look for the flat washer shown in the picture
below. If you don’t see it, it could be stuck to the opening the motor slides through.
Metal Washer (not
present on all
machines.)
8) Ensure the metal washer is put back on top of the Knurled Wheel. (Not present on all
machine)
9) Slide the new Depth Limiter back under the head of the machine and replace all the Allen
screws that were removed. Replace the vacuum house.
10) Try turning the Knurled Wheel to ensure it was reinstalled properly. It should turn smoothly.
11) Now you must reset your motor height. Please refer to the How To Set The Motor Height
document to perform this procedure. It may be necessary to lower your motor to place a drill
bit in the collet.
References
All ProtoMat manuals
How To Set The Motor Height
LPKF Technical Support
Author
Jeffrey R Bengtson
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