Electric Screwdrivers and more!

Tamper proof RPM lockout adjustment tabs for the EDU1FR

Posted By: Jim Chase on Jun 2, 2009

RPM control is a key component to managing the moment of inertia in the screw tightening process.  Too high a speed can cause the screw to strip even when the screwdriver is set at the correct torque setting.  Starting at a slow speed and increasing speed over time helps to avoid cross threading.  RPM adjustments can be critical to the success of a screw tightening strategy.

The Kolver EDU1FR Controller's RPM and Ramp adjustment provide unique RPM profile adjustment capability in a low cost Clutch Controlled Screwdrivers.  The adjustments are made with two manual knobs on the front of the Controller.

	One for maximum speed which allows for an adjustment down to 40% of the maximum rate of your chosen screwdriver.
	The second knob adjusts the ramp of the speed.  The adjustment is from 0 - 10.  10 being the maximum ramp of 2 seconds

Question: How do you lock the operator out from changing these adjustments on a low cost controller with manual adjusting knobs on the front?

Answer: Remove the manual adjusting knobs and replace them with tamper proof lock-out tabs P/N 100001

Recommended Procedure:

1. Remove the six mounting screws that hold the front cover plat of the EDU1FR controller in place.
2. Pull the cover plate forward about one inch.  This action will pull the adjusting knobs out of the trim pots
3. Remove the adjusting knobs from the front cover plate
4. Put the cover plate back in place and replace the six mounting screws
5. Make the appropriate RPM adjustments by using a hand screwdriver to adjust the Ramp and RPM Adjustments
6. Once the RPM profile is adjusted correctly snap tamper proof RPM lockout adjustment tabs in the holes in the controller cover.

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