Minerva Boskovice 4182i 100 Series, Instruction Manual

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Table 3b
Recommended speed at simultaneous work trimming
To observe: To obtain uniform stitch length, the sewing speed must be reduced. The recommended values apply to current leathers
used in the shoe industry. For extremely soft or extremely hard leathers, tests should be carried out and the sewing speed should
be adjusted accordingly.
The recommended speed has been chosen so as to correspond to the assortment of the available pulleys.
Stitch type Double thread lock-stitch 301
Hook R 816 - standard, vertical
Needle System 134; 134LR; 134 KKLR
Threads max. 500 dtex x 1 x 3
Stitch length max. 5 mm ± 10%
Sewing speed max. 3500 SPM (the maximum sewing speed with the
simultaneous trimming is limited by the stitch length
and by the hardness of the material being trimmed)
Top roller stroke 5,5 ± 0,5 mm - via hand lever
12.5 ± 1 mm via electromagnet
Length of trimmed thread ends 8....11 mm
Height of post bed 173 mm
Opening space of machine head 270 x 298 mm
Weight of the head max. 55 kg (61 kg head with minimotor)
Weitght of the stand max. 60 kg (38 kg for head with minimotor)
Driving unit Clutch motor (min. 0.35 kW)
Stopmotor (min. 0.4 kW)
Dimension of bed plate 178 x 518 mm
Input machine max. 600 W
Trimmed material max. thickness - 2,5 mm
Distance between the needle axis and the work trimmer line 0,8 - 1,5 mm (according to sewing category)
Power output of the work trimmer motor 25 W
Stroke frequency of the work trimmer knife 3500 strokes/min (constant)
Stroke range of the work trimmer knife adjustable to 2,4 mm
Layout dimensions of the machine (including the stand) 1060 x 550 mm
Height of the machine (including the stand) 1680 mm
Stitch length Sewing speed
mm SPM
1,5 2500
2,5 2000
4 1200
5 800
S080 870235 S425 870237 S080 870238 S080 870239
Thickness of
the material trimmed
1 - 4 1,5 - 4 1 - 2 0,2 - 0,8
Minimum radius for the
material being trimmed
~6 ~6 ~4 ~6
Knife stroke
2,4 2,4 1,2 2,4
steel hard meal steel steel