Grizzly G0668 owner manual Cutting Operations, Pages 36

Motor & Electrical (continued)

Symptom	Possible Cause		Possible Solution
Machine has vibra-	1.	V-belt(s) worn or loose.	1.	Inspect/replace V-belts with a new matched set
tion or noisy opera-				(Pages 36 & 37).
tion.	2.	Pulley is loose.	2.	Realign/replace shaft, pulley, set screw, and key as
				required.
	3.	Motor mount loose/broken.	3.	Tighten/replace.
	4.	Machine is incorrectly mounted or sits	4.	Tighten/replace anchor studs in floor; relocate/shim
		unevenly.		machine.
	5.	Workpiece is loose.	5.	Use the correct holding fixture and reclamp
				workpiece.
	6.	Motor fan is rubbing on fan cover.	6.	Replace dented fan cover; replace loose/damaged
				fan.
	7.	Motor bearings are at fault.	7.	Test by rotating shaft; rotational grinding/loose shaft
				requires bearing replacement.
	8.	Blade is at fault.	8.	Re-tension/replace blade (Pages 24 & 25).
	9.	Blade wheels out of alignment.	9.	Re-align blade wheels (Page 38).
Cutting Operations

Symptom		Possible Cause		Possible Solution
Machine slows when		1.	Feeding workpiece too fast.	1.	Reduce feed rate/increase blade speed.
operating.		2.	Blade is dull.	2.	Replace blade (Page 24).
Ticking sound when		1.	Blade weld contacting blade guide/support	1.	Inspect/re-grind blade weld (Page 28); re-adjust
the saw is running.			(a light ticking is normal).		blade guides/support (Page 26).
		2.	Blade weld may be failing.	2.	Inspect weld and re-weld blade if necessary (Page
					28), or replace blade (Page 24).
Blade	contacting	1.	Table improperly mounted or aligned.	1.	Properly align table (Page 40).
table.
Vibration when cut-		1.	Workpiece is loose.	1.	Use the correct holding fixture and reclamp
ting.					workpiece.
		2.	Loose or damaged blade.	2.	Re-tension/replace blade (Pages 24 & 25).
		3.	Metal chip buildup on wheels.	3.	Clean metal chips from wheels.
Rough or poor qual-		1.	Feeding workpiece too fast.	1.	Reduce feed rate/increase blade speed.
ity cuts.		2.	Incorrect blade for operation; worn or dam-	2.	Use the correct blade for the operation (Page 19);
			aged blade.		replace worn or damaged blade (Page 24).
		3.	Blade guides/support adjusted incorrectly.	3.	Correctly adjust blade guides/support (Page 26);
					set the blade guides approximately 1/8" above
					workpiece.
Blade	wanders or	1.	Blade lead.	1.	Re-tension/replace blade (Pages 24 & 25).
doesn't cut straight.		2.	Metal chip buildup on wheels.	2.	Clean metal chips from wheels.
Cuts are not square		1.	Table tilt is not adjusted to "0".	1.	Adjust table to "0" tilt.
(vertically).		2.	Table is not square to the blade.	2.	Adjust table square with blade (Page 40).
Wheel is noisy.		1.	Wheel bearing is worn out.	1.	Replace wheel bearing.
		2.	V-belt is too tight (lower wheel).	2.	Check/re-tension the V-belt (Page 36).
Blade does not track		1.	Wheels are not coplanar or aligned with	1.	Adjust wheels to be coplanar/aligned with one
consistently, cor-			each other.		another (Page 38).
rectly, or at all.		2.	Rubber tires on wheels are worn out.	2.	Redress the rubber tires on the wheels (Page 33).

G0668 20" Vertical Metal-Cutting Bandsaw -35-