Version 4.0.2 dated 2019-4-3Page 28 Translation of the original instructions
BF20V | BF20L | BF20LDGB
BF20V_BF20L_BF20LD_GB_4.fm
OPTIMUM
MASCHINEN - GERMANY
®
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 35% less than at the right-handed rotation. First select the turning direction
before switching on the machine
with the push button.
Speed
Potentiometer to set the required speed. Adjust the speed with the potentiometer. The speed
and thus the cutting speed depends on the material of the workpiece, the milling cutter diameter
and the cutter type.
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.
Gear stage
Selection rotary-type switch to select the reduction stage.
ATTENTION!
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. 150 - 3000min
-1
.
Turn the gear switch to the position "L" for a speed range
90 - 1480 min
-1
4.3 Switching on the drilling-milling machine
Switch on the main switch.
Select the gear level.
Choose rotational direction.
Set the potentiometer to the lowest speed.
Close spindle protection system.
Actuate push button "Start".
Set the required speed on 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.
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