Depth Indicator; Operation Cycle - Promac JDT-2512V Mode D'emploi

6.2 Depth Indicator

A drilling depth indicator is provided on
the side of the drill head. The lock knob
is provided at the side, on the top of
quill lever.
Before starting the motor:
I. Set the depth to zero by lowering
and holding the cutting tools to
the surface of the work piece.
Use quill lever to lower the
spindle.
II. Unlock the depth scale by
turning the lock knob.
III. Set the depth stop by rotating the
depth stop stud to the desired
depth.
IV. Lock the depth scale by turning
the lock knob.

6.3 Operation Cycle

Safety chuck guard must be in position,
electric box must be closed and locked,
and unlock emergency stop switch (C)
by turning the red cap of the switch
clockwise to start machine. In a critical
condition, stop machine by hitting
emergency stop switch or Spindle OFF
switch (B) to stop machine.
1. Check if the head is secured.
Failure to secure the head can result
in damage of the machine and
personal injury.
2. Secure the work piece to the table.
3. Use crankshaft to adjust the table
to the desired height.
4. Use lock-lever to secure the table.
5. Use the spindle/quill feed lever to
bring the drill or tapping tip down to
the surface of the work piece and
hold.
6. Set the depth indicator/stop to
required depth.
7. Back the drill or tapping tip off the
work piece a bit.
8. Select drilling or tapping mode.
9. Press Spindle ON switch to begin
spindle rotation.
In Drilling Mode
10. Use the depth handle to bring the
tip of the drill bit to the surface of
the work piece hold.
11. The required depth is set by
previous steps 5 and 6.
12. Select proper speed.
13. Begin drilling by using the quill feed
lever.
In Tapping Mode
In general, speeds for tapping require
low speed which is lower than 200 rpm.
14. Use the depth handle to bring the
tip of the tapping bit to the surface
of the work piece and hold.
15. The required depth is set by
previous steps 5 and 6.
16. Select the spindle speed.
17. Begin tapping by using the quill
feed levers.
18. At the end of a tapping or drilling
operation, press the stop button
switch to turn off the machine.
Note: While tapping, pause spindle
down feed at the bottom of operation to
allow the breaking and reversal of
rotation of the spindle.
In general, use low speeds for tapping.
Tapping at high speed will tap more
quickly, but there is a danger of
damage to work piece and tool.
Tapping requires an accurate setting
for the depth stop to allow the
machine to switch tapping direction
and the removal of the tapping bit.
6.4 Choosing the spindle speed
The correct spindle speed depends on
the type of machining, the workpiece
material as well as the tool diameter
and material.
The speed recommendations apply to a
tool diameter of 10mm and a machining
with a high-speed steel (HSS) tool (e.g.
spiral drill).
Aluminum, brass 1500 rpm
Grey cast iron: 1000 rpm
Steel (C15): 800 rpm
Steel (C45): 600 rpm
Stainless steel: 300 rpm