Operation
MAB 480
21
Selecting the speed range
CAUTION
► Switch over the gear stages only with the machine at stand-
still.
The machine has a gearbox with two mechanical gear stages:
Gear stage 1: Load speed - 250 rpm
Gear stage 2: Load speed - 450 rpm
To select the desired gear stage, set selector lever (5) to
stage 1 or 2 with the machine switched o.
NOTE
► Select the speed range according to the material and drilling
diameter.
Setting the speed
In addition to the mechanical gearbox, the machine also has
full-wave control electronics with which the speed can be innitely
varied.
First set the appropriate gear stage, then adapt the speed
using the electronic speed control (7).
Gear stage 1: 50 - 250 rpm
Gear stage 2: 100 - 450 rpm
NOTE
► If possible, always select a setting with low gear stage and
high motor speed. The motor is thus set to high torque and
protected against overheating under heavy load.
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