Grizzly Power Feeder G7873 - Manual (Page 23)

Model g4181/g7873 1-hp power Feeder
-21-
review the troubleshooting and procedures in this section to fix or adjust your machine if a problem devel-
ops. if you need replacement parts or you are unsure of your repair skills, then feel free to call our technical
support at (570) 546-9663.
SEctiON 6: SERvicE
troubleshooting
Motor & Electrical
symptom possible Cause possible solution
Motor will not start. 1. Low voltage.
2. open circuit in motor or loose connections.
3. Blown fuse tripped circuit breaker.
4. start capacitor isat fault.
5. Motor switch or motor is at fault.
1. Check power supply for proper voltage.
2. inspect all lead connections on motor and circuit
board for loose or open connections.
3. repair for cause of overload and replace fuse or
reset circuit breaker.
4. replace start capacitor.
5. replace switch, or motor.
Fuses or circuit
breakers trip. 1. short circuit in line cord or plug.
2. short circuit in motor or loose connections.
3. power feeder rollers are jammed.
1. inspect cord or plug for damaged insulation and
shorted wires and replace extension cord.
2. inspect all connections on motor for loose or
shorted terminals or worn insulation.
3. disconnect all machinery from power and correct
for cause of jamming.
Motor overheats. 1. Motor overloaded.
2. air circulation through the motor restricted. 1. reduce power feeder feed rate.
2. Clean out motor fan cover to provide normal air
circulation.
Workpiece jams
when feeding under
rollers. 1. rollers set too low.
2. Feeder at wrong angle. 1. raise feeder.
2. adjust angle.
Workpiece slips
while passing
beneath rollers. 1. rollers positioned too high, no traction.
2. Feeding too fast.
3. rollers are dirty or oily.
4. Worn roller(s). 1. Lower feeder.
2. slow feed speed.
3. Clean roller surface with a mild solvent.
4. replace roller(s) (
Page 22).
Workpiece cut is
burnt. 1. Wrong feed speed.
2. Cutter is at fault. 1. adjust feed speed.
2. sharpen or replace dull blade or cutter.
rough finish or
chipped grain on
workpiece. 1. Feed speed too fast.
2. dull cutter or blade.
3. power feeder angle is not toed in to keep
workpiece against the fence.
1. slow speed.
2. replace with sharp cutter or blade.
3. adjust power feeder so it is toed-in 1° to 1.5°
toward the fence.
Fuzzy grain occurs
when planing or
moulding. 1. Lumber has high moisture content.
2. dull knives/cutter.
1. if moisture content is higher than 20%, sticker and
allow to dry.
2. sharpen or replace knives.
Workpiece hangs
and does not enter
the machine. 1. power feeder roller height is set incorrectly. 1. Lower the power feeder roller 1 ⁄
8
" lower than the
height of the workpiece.