Grizzly G0755 owner manual Service, Troubleshooting

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SECTION 7: SERVICE

Review the troubleshooting and procedures in this section if a problem develops with your machine. If you need replacement parts or additional help with a procedure, call our Technical Support at (570) 546-9663. Note: Please gather the serial number and manufacture date of your machine before calling.

Troubleshooting

Symptom	Possible Cause		Possible Solution

Machine does not	1.	Emergency stop button depressed.	1.	twist emergency stop button clockwise until it pops
start.				out to reset it.
	2.	plug at fault or wired incorrectly.	2.	Ensure plug is not damaged and is wired correctly.
	3.	incorrect power supply voltage.	3.	Ensure power supply voltage matches circuit
				requirements (Page 11).
	4.	Wall fuse/circuit breaker is blown/tripped.	4.	Ensure circuit size is correct and a short does not
				exist. Reset breaker or replace fuse.
	5.	Wiring is open/has high resistance.	5.	Check for broken wires or disconnected/corroded
				connections; repair/replace as necessary.
	6.	Motor wired incorrectly.	6.	Ensure motor wiring is correct (Page 43).
	7.	Control panel buttons at fault.	7.	Ensure each button is wired correctly; replace if at
				fault (Page 42).
	8.	Motor or motor components are at fault.	8.	test/repair/replace.

Machine stalls or is	1.	Feed rate/cutting speed too fast.	1.	decrease feed rate/cutting speed.
overloaded.	2.	Wrong cutter type.	2.	use the correct cutter for the task.
	3.	Machine is undersized for the task or	3.	use smaller or sharper tooling; reduce feed rate or
		tooling is incorrect for the task.		spindle speed; use cutting fluid if possible.
	4.	Motor has overheated.	4.	Clean off motor, let cool, and reduce workload.
	5.	Motor wired incorrectly.	5.	Ensure motor wiring is correct (Page 43).
	6.	Motor bearings are at fault.	6.	test by rotating shaft; rotational grinding/loose shaft
				requires bearing replacement.
	7.	Motor or motor components are at fault.	7.	test/repair/replace motor.

Machine has	1.	Motor or machine component is loose.	1.	inspect/replace stripped or damaged bolts/nuts, and
vibration or noisy				re-tighten with thread locking fluid.
operation.	2.	Workpiece not secure.	2.	properly clamp workpiece on table or in vise.
	3.	Excessive depth of cut.	3.	decrease depth of cut.
	4.	Cutter/tooling is loose.	4.	Make sure tooling is properly secured.
	5.	Cutter is dull or at fault.	5.	replace/resharpen cutter.
	6.	Bit is chattering.	6.	replace/sharpen bit; index bit to workpiece; use
				appropriate feed rate and cutting RPM.
	7.	Machine is incorrectly anchored to floor or	7.	tighten/replace anchor bolts; relocate/shim
		sits unevenly.		machine.
	8.	Motor fan is rubbing on fan cover.	8.	replace dented fan cover or damaged fan.
	9.	Motor bearings are at fault.	9.	test by rotating shaft; rotational grinding/loose shaft
				requires bearing replacement.

Model G0755 (Mfg. Since 1/13)

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Contents Model G0755 Page Table of Contents Machine Description Manual Accuracy IntroductionContact Info Identification Machine Data Sheet Table Info Safety Instructions for Machinery SafetyPage Additional Safety for Mill/Drills Availability Power SupplyFull-Load Current Rating Circuit Requirements forExtension Cords Grounding InstructionsMinimum Gauge Size 14 AWG 50 ftNeeded for Setup SetupUnpackingInventory Before cleaning, gather the following CleanupBasic steps for removing rust preventative Site Considerations To move your machine into position Lifting & PlacingAnchoring to Concrete Floors Anchoring to Floor AssemblyMachine Base Concrete Lubricating Mill/Drill Joining Drill Chuck ArborTo join the drill chuck and arbor To test run the machine Test RunSpindle Break-In Inspections AdjustmentsOperation Overview OperationsUsing Fine Downfeed Using Coarse DownfeedControl Panel Downfeed Controls IdentificationHeadstock Movement Depth StopRaising/Lowering Headstock Tilting Headstock Table TravelGraduated Dials ON/OFF Switch Axis Power FeedAxis Handwheels Installing Tool Holder Installing/Removing ToolingTo install tool holder Tool Needed QtyRemoving Tool Holder Spindle SpeedDetermining Spindle Speed Tools Needed QtySpindle Speed Range Lever Speed Lever Setting Spindle SpeedISO 68 and ISO 32 machine oil AccessoriesH7527 6 Rotary Table Set H7527-6 Rotary Table SetG5774-R-8 End Mill Holder Set G9612-Test IndicatorG5641-1-2-3 Blocks G9815-Parallel Set H5930-4-Pc Center Drill Set H5931-4-Pc Center Drill SetCleaning Protecting MaintenanceSchedule LubricationTo change the headstock oil Headstock ReservoirTable/Column Ways & Quill Ball OilersQuill Rack & Pinion Table LeadscrewsAxis Leadscrew Troubleshooting ServiceSymptom Possible Cause Possible Solution Adjusting Leadscrew Backlash Adjusting GibsTo tram the spindle with the table Tramming SpindleReplacing Power Feed Carbon Brushes Tightening Return Spring Tension To adjust the return spring tensionWiring Safety Instructions WiringControl Panel Electrical Box WiringMotors & Other Electrical Wiring Electrical Photos Axis Motor Axis Limit SwitchElectrical Box Spindle Motor Control Panel Rear ViewHead PartsDescription Head Parts ListDescription Table & Column Table & Column Parts List 401 406 402 403 405 404 415 411 408 407 409 412 410 413 414 Electrical ComponentsPower Feed Accessories Machine Labels & Cosmetics Comments Warranty CardBOX BELLINGHAM, WA Grizzly INDUSTRIAL, INCWarranty & Returns