Jet 50000915M, Руководство по эксплуатации

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We recommend you to use an FI protected switch sensitive to AC/DC. FI protected switches sensitive to
AC/DC (RCCB, type B are adequate for 1 phase and 3phase fed frequency con- verters (driving regulator).
An FI protected switch type AC (only for alternating current (AC) is not appropriate for fre- quency converters. FI
protected switches type AC are no longer used.
3.5.5 Functional test
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Clamp a workpiece into the lathe chuck of the machine or close the jaws of the lathe chuck fully before turning
on the machine.
WARNING!
Ь
Mind the maximum chuck opening.
Ь
Do not stand in front of the lathe chuck when turning on the machine for the first time.
3.6 Change gears
3.6.1 Assembly of gears changing
INFORMATION
The assembly of the change wheels may be performed in the sequence that the standard too- thed wheel (1st drive
unit) first cams into toothed wheel A, then toothed wheel A to toothed wheel C and toothed wheel D to toothed
wheel F.
For the lathes D210 and D250, an additional toothed wheel is mounted behind the 1st toothed wheel (drive unit) so
that by removing this toothed wheel the turning direction of the leading screw is being changed and that you may
machine a left-handed thread. By removing the too- thed wheel, the gear transmission ratio is not being changed,
the thread pitch remains the same. Therefore, the leading screw of the lathes D210 and D250 have a right-handed
thread. As you may see in the following example for a calculation, the size of the toothed wheel B is not important
as in the calculation they cancel each other out (reducing a fraction). Therefore you may use a toothed wheel of
any size in the position B if you want to machine a left-handed thread in order to bridge the gap to the 1st drive unit
for D210 and D250 which results from the removed toothed wheel.
3.6.2 Table of the gear wheels
The tables are built up in a way that you may later on assemble the required combination to cut a thread without
having to look up the details. Ligatures from one figure to the following one represent the caming of one toothed
wheel to the following one. The identifier "H" stands for bushing or a small toothed wheel as an auxiliary distance.
This smaller toothed wheel as an auxiliary distance must of course not be camed in with any other toothed wheel.
For the follo- wing example the table of D210 and D250 had been selected.
Change gear(drive unit)
with 40 teeth, standard
A
(not mounted) A
B
C
D
E
F (not mounted)
Leadscrew 2mm pitch