OPTIMUM
M A S C H I N E N - G E R M A N Y
20
12
Operation
Version 1.0.1 dated 30 / 08 / 2012
Page 26
Original operating instructions
MH28V
GB
Main switch
Switches the voltage supply on.
The main switch is at the back of the control panel.
Hand-actuated auxiliary switch Start / Stop
Switches the machine on or off.
Turning direction
Selection left-handed, right-handed rotating or switch-off position. At the left-handed rotation
the speed is about 50% less than at the right-handed rotation. First select the turning direc-
tion before switching on the machine with the push button.
Speed
Potentiometer to set the required speed. Set the speed at the potentiometer. The speed and
thus the cutting speed are depending of the material of the workpiece, of the cutter diameter
and of the type of cutter.
The electronics controls the speed slowly to the target value with a ramp. Therefore, please
wait a while before you continue milling or drilling with the feed.
Reduction stage
Selection rotary-type switch to select the reduction stage.
CAUTION!
Wait until the drilling-milling machine has come to a complete halt, before performing
any changes on the gear switch.
Turn the gear switch to the position "H" for a speed range
from
approx.
100-830 min
-1
.
Turn the gear switch to the position "L" for a speed range
from
approx.
300-2500 min
-1
.
4.3
Switching on the drilling-milling machine
Switch the main switch on.
Select the reduction stage.
Select the turning direction.
Set the potentiometer to the lowest speed.
Close the spindle protection.
Actuate the hand-actuated auxiliary switch Start.
Set the required speed at the potentiometer.
4.4
Switching off the drilling-milling machine
Press the hand-actuated auxiliary switch Stop. During long-term standstill switch the turn-
ing direction switch to the zero position.
