Proxxon MBS 240/E, Operating Instructions Manual, Page: 8 / 14

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8. Check if the band runs correctly in the lower guide 1
(Fig. 15). The guide slot must be exactly perpendicu-
lar. Adjust the band guide by releasing the clamping
screw (as described in the section "Checking and ad-
justing the lower saw band guide").
9. Mount the housing cover 1, tighten the Allen screws 2.
10. Readjust the saw band tension as necessary.
Adjusting the upper saw band guide
Caution:
Only work on the saw band guide when the machine is
switched off and the mains plug is pulled.
Adjusting the position of the upper
saw band guide
Before work, please adjust the saw band guide so that it
is as close to the work piece as possible. Adjustments are
made as follows:
1. Release the screw 1 (Fig. 6)
2. Push the saw band guide 2 to the desired position
3. Re-tighten the screw 1
Adjusting the upper saw band guide
to the respective saw band width:
The factory has adjusted the saw band guide to the stan-
dard saw band. When using accessory bands with differ-
ent dimensions, it may be necessary to adjust the
bearings of the saw band guide.
1. Slightly release the Allen screw 3 (fig. 14).
2. Push the adjusting piece 2 so that the rear edge of the
saw band runs off along the rear bearing. Use the num-
ber markings as orientation. Edge A should be at the
position of the number that represents the saw band
width.
3. Tighten the Allen head screw 3!
Adjusting the upper saw band guide
to the respective saw band thickness:
1. The saw band thickness is corrected with the setting
screw 4 (Fig. 14). Make sure that the band is guided
properly, but that it never jams!
Checking and adjusting the lower saw
band guide
The band runs in a slot in the lower band guide. The fac-
tory has adjusted the band guide so that the slot is exactly
perpendicular.
This is the correct setting. If exceptional cases make it
necessary to readjust the band guide 1 (Fig. 15), then
please proceed as follows:
1. Unscrew the four Allen screws 2 (Fig. 12) and remove
the housing cover 1.
2. Release the screw 2 (Fig. 15) with an Allen key and
turn the band guide to the correct position.
3. Re-tighten the screw 2.
4. Screw the housing cover back on.
Replacing the plastic rings
of the running wheels
The running wheels are covered by a plastic ring to pro-
tect the saw bands. The plastic rings are wearing parts
and must be replaced as needed. Therefore, regularly
check the plastic rings. If "hollow abrasion" is determined,
replace the corresponding ring (Fig. 16).
1. Disassemble the front housing part and remove the
saw band as described in the section "Replacing the
saw band"
2. Cut through the worn plastic ring (Fig. 17) with a sharp,
heated blade.
3. Heat the new plastic ring in hot water (not boiling) for
approx. 10 minutes and fit on.
4. Replace and tension the band, and reassemble the
front housing part.
Operation with the diamond saw band
Things to know about working
with diamond saw bands
Only proper cooling of the diamond band will ensure opti-
mally cut glass or ceramics and enable a long service life
of the band.
Appropriately, this can be done with a brush: This enables
you to dose the coolant economically and precisely, thus
preventing an inappropriate amount from getting into the
machine. When working, simply set a glass of water next
to the machine and cool the band with economic brush
strokes at regular intervals.
It is not possible to cut radii less than 15 mm! (see Fig.
19).
Important:
Do not use diamond saw bands for metal, plastic or wood.
Caution:
The adjustment of the saw blade width (see also the
chapter "Adjusting the upper saw band guide to the re-
spective saw band width or thickness") must be done dif-
ferently for the diamond band: In any case make sure that
the actual diamond coating is not touched by one of the
bearings. Therefore, adjust the thickness rather gener-
ously.