30
2
6
5
1
3
4
8
9
B
A
1
4
3
2
5.5.5 Setting of the trimming mechanism
engagement
When engaging the trimming mechanism still before fitting
the pawl (1) into the slot in the lever (2) there is to be the
clearance A = 0,01 up to 0,05 mm and the clearance B =
0,5 up to 0,6 mm.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
-
Loosen 2 screws (3) and 2 screws (4).
-
In shifting vertically the microswitch (5), shift the cam (6)
until obtaining the clearance B and tighten then the screws
(4).
-
Shift the lever together with the pawl (1) under the push
button (7) in such a way, so that the pawl does not still fits
into the slot.
-
Set vertically the push button (7) on the clearance A and
tighten the screws (3).
-
Loosen the screws (8) and, in shifting horizontally the holder
(9), set the microswitch (5) in such a way, so that the motor
of the trimming mechanism is switched off in the bottom
position of the push button (7) and switched on in its top
position.
5.5.6 Setting of the torsional moment
of the return spring
The return spring (3) should have the least moment, but ¨this
moment should be sufficient for returning the trimming knife
in its starting position after having switched off the trimming.
This means the spring should individually be set up in
accordance with the thickness and the stiffness of the trimmed
material.
Caution! Danger of injury!
Switch off the main switch! Before starting the
setting operation, wait until the motor stops!
-
Loosen 2 screws (1) on the adjusting ring (2).
-
In turning the ring (2) set at random the twisting moment of
the spring (3) and tighten both screws (1).
-
Start sewing together with the edge trimming. Stop the
machine in the middle of the seam without removing the
sewn material. Using the push button (4), stop the trimming
function and follow up, if the spring (3) fulfils its required
function. Correct eventually the setting.
5.6 Sharpening of the knives
For various types of trimmed material, the Company MAIER
manufactures knives with respective profiles in various
qualities of materials and dimensions.
(The usable knives are given in the Directions for Use together
with the respective supply numbers of the Maier and Minerva
companies).
To obtain due quality of trimming, the knife should be ground
in wet condition on special grinding machines at short inter-
vals (of about 2 to 5 hours) corresponding to the durability of
the knife trimmer edge. The special grinding machines are
produced by the following companies:
FORTUNA WIEN GmBH, A-1151 WIEN-Pelzgasse 13,
Postfach 91
MAIER UNITAS GmBH NÜRTINGER Strasse 19, D-7316,
KÖNGEN, Postfach 1130
