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General Information Continued
Minimum/Maximum Revolutions.
Remember that the Minimum and Maximum
revolutions are the motor revolutions, not the number of revolutions of the bit, or
fastener. You may notice a difference in the Maximum revolution numbers when driving
fasteners of the same length. This is due to the fact that the clutch has some “slack”
caused by its construction. This is the reason you need to drive several fasteners
before learning a joint. This may also be the reason for an error on a fastener driven
after running the tool in reverse when loosening or removing a fastener.
Because the number of motor revolutions will be greater than the actual rotation of the
fastener it is possible to “fine tune” the fastener to be able to detect the presence or
absence of a washer or an improper length fastener in the joint
If you are using a screw presenter to pick up the fasteners you should set the Minimum
Revolutions high enough so that when the trigger is pulled to rotate the bit into the
head of the fastener to pick it out of the presenter, you don’t generate an error.
Work Reset Timer and Reverse Count Timer
When the last fastener in the batch has
been driven properly, the green (Pass) LED is lit, the Buzzer beeps (if enabled), the
Maximum Revolutions show on the display briefly, then a 0 is seen before the count is
reset to the starting count. The Work Reset Timer controls how long the green LED
stays lit, the buzzer beeps, and 0 remains on the display before the counter resets to
the starting count.
The Reverse Count Timer sets a time period where removing a fastener will increase
the count shown on the display by one. After this time period, removing a fastener will
not affect the count.
It is not necessary to set the Reverse Count Timer to use the Work Reset Timer but it
is necessary to set the Work Reset Timer to use the Reverse Count Timer. In order
properly identify the removal of any screw in the batch, the Work Reset Timer must be
set Higher than the Reverse Count Timer. Otherwise removing the final screw in the
assembly will not be recognized and the count will not be increased, but will be reset.
Example;
There are 5 screws in the batch, when the two timers are set properly and 4
fasteners are driven correctly with the count showing 1, driving and removing the final
fastener will reset the count to 1. When the two timers are set improperly and 4
fasteners are driven correctly with the count showing 1, driving and removing the final
fastener resets the count to 5
Re-Hit Timer.
In some applications it may be desirable to pull the trigger a second or
third time after the initial clutch shut off to properly clamp a gasket or lock washer.
Setting the Re-Hit timer will allow this practice without registering an error, lighting the
Red (Fail) LED or sounding the buzzer.
