Makita BTD042 Technical Information page 5

(3) How to Check the Pre-set Number of Blows
Release the switch trigger, install the battery on the machine, and then check how many times the green or the red
light of the LED blinks.
As mentioned in page I-3, the green light blinking indicates the second digit of the pre-set number of blows,
and the red light blinking indicates the first digit.
Therefore, when the pre-set number of blows is 12, you can see the following states on the LED:
First, the green light blinks once.
Second, the red light blinks twice.
Third, the lights turn off.
(4) Relation Between Pre-set Number of Blows and its function
Forward or
Reverse
Pre-set number
of blows
Automatic Blow-Stop System does not
00
work.
When you keep on pulling the trigger until
the blow action finish the pre-set number of
blows, the green light turns on to notify you
01 to 99
that the bolt has been completely tightened.
When you release the trigger before
the blow action finish the pre-set number of
blows, the red light turns on to notify you
that the bolt has been poorly tightened.
(5) Relation Between Preset Number of Blows and Time Required to Finish the Blows
The equation for this relation is:
Time required = ( Preset number of hammer blows X *2 ) X **20ms
Note* : "X2" means two blows per spindle rotation.
Consequently, when the preset number of hammer-blows is 10, the hammer actually blows 20 times.
Note**: ms = micro second
The following graph shows this relation.
4
3.5
3
2.5
2
1.5
1
0.5
0
0 10 20
On Forward Rotation
30 40 50
Preset number of hammer-blows
On Reverse Rotation
Automatic Blow-Stop System does not
work.
Automatic Blow-Stop System does not
work.
60 70 80
P 5 / 10
90 100