Porter-Cable 7538 instruction manual Overload Protection, Soft Start

Fig. 10

To avoid injury or damage to finished work, allow the motor to come to a COMPLETE STOP before putting it down.

OVERLOAD PROTECTION
MODEL 7538 is equipped with a
thermal-type circuit breaker (G) MODEL 7538
	G
Fig. 10, located in the top of the
motor. This circuit breaker will shut
the motor “OFF” if the overload is
prolonged.

If the circuit breaker “trips”, switch the motor “OFF” and:

1.release the trigger switch (A)

Fig. 9.

2.determine cause of the

overload (i.e. dull bit, low voltage, excessive feed rate, etc.) and correct.

3.allow the router to cool for three minutes.

Confirm that the trigger switch is “OFF” before resetting the circuit breaker to avoid accidental start-up.

4.reset the circuit breaker by pressing the “ON” end of circuit breaker.

5.restart the router, using the instructions found in the section “TO START

AND STOP ROUTER”.

MODEL 7539 is equipped with an internal overload protector that will shut motor “OFF” if the overload is prolonged.

If the motor stops during use:

1.release the trigger switch (A) Fig. 9.

2.determine the cause of the overload (i.e. dull bit, low voltage, excessive feed rate, etc.) and correct.

3.allow the router to cool for three minutes.

4.restart the router, using the instructions found in the section “TO START

AND STOP ROUTER”.

SOFT START

MODELS 7538 and 7539 have a “Soft Start” feature designed to minimize startup reaction torque.

SPEED CONTROL (Model 7539 only)

Five operating speeds from 10,000 RPM to 21,000 RPM are available by moving the speed selector knob

(F)Fig. 11. Set the speed prior to engaging the router bit into work. To change the speed after work has begun, stop the router, remove the router from the workpiece, and adjust the speed setting.

F

MODEL 7539

Fig. 11

13