WABECO D2000, Operating Instructions Manual

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6. Thread cutting and automatic feed
6.2 Use of change gears
Working with the automatic longitudinal feed
1. Turn the control lever upon the longitudinal turning symbol. Turn the lead screw by use of the ball
crank, in order to ensure the lock of the clutch disc.
2. Switch on the directional control switch on the right side of the foundation.
Centre position = Off
Left pressed = Feed to the spindle
Right pressed = Feed to tailstock
Adjust the feed speed by using the potentiometer.
3. Turn the directional control switch to the centre position after finishing the process of automatic
longitudinal turning.
Working with the thread cutting device
Mount the respective change gears in order to attain the preferred thread pitch.
To achieve a thread pitch of 1.5mm the gear wheels are mounted ex-factory.
During the process of cutting metric threads the toothed wheel Z48 remains most of the time fixed on
the change gear bracket.
In the process of cutting inch thread the toothed wheel Z48 is replaced by the toothed wheel Z34.
The toothed wheels A2 (beside Z48) and C (on top of the leadstock) are interchanged in case of the
selective lead of thread (v. thread table).
Preselect slowest spindle speed.
Turn the gear lever to the symbol thread cutting. The gear lever needs remain in this position as long
as the thread cutting is in process.
In order to be able to full fill more than one cut for the creation of the thread the thread end is stopped
through a reversing switch as well as the threading tool is removed from the cutting area at the same
time.
Switch the reversing switch to the left in order to have the support moving directional to the tailstock. If
the threading tool is positioned almost 5 mm in front of the beginning of the thread, the machine needs
to be stopped.
In case the threading tool is positioned about 5 mm in front of the beginning of the thread the machine
needs to be stopped again and the transverse skid is to be lathed to the front to the same extend as
during the former cut as well as the desired removal of goods.
After, turn the reversing switch to the right and proceed with thread cutting. The gear lever is only to be
switched off after the thread cutting process is finished.