Controls; Spindle Speed Selection; Setup And Adjustments; Changing Spindle Speeds - Promac JMDT-763016 Mode D'emploi

6.1 Controls

Fig 3
A....X-axis handwheel
B....Y-axis handwheel
C....X-axis adjustable stop
D....X-axis slide lock
E....Y-axis slide lock
H
F
Fig 4
F....Depth stop
G....Downfeed handles
H.....Fine feed hand wheel
I.....Fine feed engagement knob
J....Fine feed dial
Fig 5
A....Motor mount lock lever
B....Head pivot lock
A
C
B
A....Power ON button / Power Light
B....Emergency stop button
C....Power OFF button
D....Quill lock handle
E
F
I
G
J
G
E....Drilling / Tapping Switch
F....Foward button
G....Reverse button
6.2 Spindle speeds selection
The correct spindle speed depends on
the type of machining, the cutting
diameter, the material to be machined
and the cutting tool.
These are recommended max. speeds
for a 10mm high speed steel (HSS) tool
(e.g. drill bit).
Aluminium, brass
Cast iron
Mild steel
High carbon steel
Stainless steel
D
Fig 6
Fig 7
1500 RPM
1000 RPM
800 RPM
600 RPM
300 RPM
If a carbide (HM) tool is used about 5
times higher speeds can be chosen.
Generally speaking, the larger in
relation the cutting diameter, the
smaller the possible RPM.
For example:
Milling mild steel with an end mill of
20mm allows a speed of
400 RPM max.
2000 RPM max. with carbide tool

7. Setup and adjustments

Warning:
Setup and adjustment work may only
be carried out after the machine is
protected against accidental starting.
Press emergency stop button!

7.1 Changing spindle speeds

Release two latches (G, Fig 8) and pull
the pulley guard (I) open.
Open the pulley cover.
Loosen the motor lock lever (F) and pull
the motor toward the head casting to
release tension on the V-belts.
Fig 8
Refer to the speed chart whenever
changing speeds.
Close and lock the pulley cover.

7.2 Arbor replacement

Release two latches (G, Fig 8) and pull
the pulley guard (I) open.
Open the pulley cover.
Hold the spindle pulley (B, Fig 9) to
keep the pulley from moving while
loosening the drawbar (C) with a
wrench.
with HSS tool