Grizzly H7757 owner manual Service, Troubleshooting, Possible Cause Possible Solution

Page 19

SECTION 6: SERVICE

Troubleshooting

Symptom

 

 

Possible Cause

 

 

Possible Solution

 

 

 

 

 

 

 

 

 

Machine

slows

1.

Workpiece

pressure

is

too

1.

Reduce workpiece pressure on

when operating.

 

great.

 

 

 

 

wheel.

 

 

 

 

 

Machine vibrates

1.

Grinding wheel is unbal-

1.

Adjust or tighten wheel mounting

when operating.

 

anced.

 

 

 

 

nut as necessary.

 

 

 

 

 

2.

Grinding wheel is damaged.

2.

Replace the wheel.

 

 

 

 

 

3.

Arbor is bent.

 

 

3.

Inspect arbor and replace if nec-

 

 

 

 

 

 

 

 

 

 

 

essary.

 

 

 

 

 

4.

Bearings are worn or dam-

4.

Inspect bearings and replace if

 

 

 

 

 

 

aged.

 

 

 

 

necessary.

 

 

 

 

 

 

 

 

Wavy

condition

1.

Workpiece

not being

held

1.

Use a holding device to firmly

on

surface

of

 

firmly.

 

 

 

 

retain the workpiece.

workpiece.

 

 

2.

Wheel face uneven.

 

 

2.

Dress the grinding wheel.

 

 

 

 

 

3.

Wheel is too hard.

 

 

3.

Use softer wheel.

 

 

 

 

 

Lines on surface

1.

Impurity on wheel surface.

1.

Dress the grinding wheel.

of workpiece.

2.

Workpiece

not being

held

2.

Use a holding device to firmly

 

 

 

 

 

 

tightly.

 

 

 

 

retain the workpiece.

 

 

 

 

 

 

 

 

 

Burning

spots

1.

Workpiece

pressure

is

too

1.

Reduce workpiece pressure on

or

cracks

in

the

 

great.

 

 

 

 

wheel.

workpiece.

 

 

2.

Improper

grinding

wheel

2.

Try a wheel that is of a softer style

 

 

 

 

 

 

type.

 

 

 

 

or coarser grit.

 

 

 

 

 

3.

Coolant required.

 

 

3.

Cool the workpiece frequently.

 

 

 

 

 

 

 

 

 

 

Wheel

 

dulls

1.

Workpiece

pressure

is

too

1.

Reduce workpiece pressure on

quickly,

grit

falls

 

great.

 

 

 

 

wheel.

off.

 

 

 

 

2.

Wheel is too soft.

 

 

2.

Select a wheel with a harder

 

 

 

 

 

 

 

 

 

 

 

bond.

 

 

 

 

 

3.

Wheel diameter too small.

3.

Replace the wheel.

 

 

 

 

 

4.

Bad wheel dress.

 

 

4.

Dress the wheel.

 

 

 

 

 

5.

Defective wheel bonding.

5.

Consult manufacturer of grinding

 

 

 

 

 

 

 

 

 

 

 

wheel.

 

 

 

 

 

 

 

Wheel clogs and

1.

Wheel is too hard.

 

 

1.

Select a softer wheel bond.

workpiece shows

2.

Feed rate too slow.

 

 

2.

Increase rate of movement of

burn marks.

 

 

 

 

 

 

 

workpiece onto wheel.

 

 

 

 

 

3.

Bad wheel dress.

 

 

3.

Dress the wheel.

 

 

 

 

 

4.

Coolant required.

 

 

4.

Cool the workpiece frequently.

 

 

 

Poor buffing per-

1. Buffing wheel is loaded with

1. Clean wheel with a buffing rake as

formance.

 

 

 

compound residue.

 

 

 

on Page 11.

 

 

 

 

 

2.

Buffing wheel is worn down.

2. Replace buffing wheel.

 

 

 

 

 

 

 

 

 

 

 

 

Model H7757 3" Mini Wool Buffer

-17-

Image 19
Contents Mini Wool Buffer Page Table of Contents Mation about proper operation of the equipment SafetySafety Instructions for Machinery Before Operating This EquipmentAlways Lock Mobile Bases if Used Before Operating Machinery Safety Instructions for the 3 Mini Wool Buffer Foreword Contact Information IntroductionTools and Hardware SET UPUnpackingInventory Model H7757 Inventory FigureTool Rests Items Needed For Set UpEye Shields To secure the buffer to a benchtop or mounting board MountingTest Run OperationsTo test run the buffer To grind or buff Grinding and Buffing Wheel CareTo properly care for your wheel, follow these tips Buffing Wheel Care To clean the buffing wheelTo dress the grinding wheel Grit Grade Bond Wheel SelectionWheel Inspection PrefixTo perform a Ring Test Replacing WheelsTo remove/mount a wheel Page H5946 H5945 H5944 AccessoriesH4383-Buffing Rake H4384-Replacement Rake H1300 H1298 G7984 H2347 H0736Buffing Wheels MaintenanceGeneral Grinding Wheels LubricationTroubleshooting ServicePossible Cause Possible Solution Parts Breakdown Description Parts ListWarranty and Returns Warranty Card BOX BELLINGHAM, WA Name Street CityStateZip

H7757 specifications

The Grizzly H7757 is a versatile woodworking tool designed for both professional woodworkers and woodworking enthusiasts. This dual drum sander stands out due to its efficient design, robust features, and advanced technology, making it an excellent choice for those seeking precision and reliability in their sanding projects.

One of the key features of the Grizzly H7757 is its dual drum configuration. This design allows users to sand larger surfaces more evenly and effectively compared to traditional single drum sanders. The two drums work in tandem, offering a combined sanding width that enhances productivity, particularly when dealing with wide boards or large panels. The adjustable height feature ensures that users can easily accommodate various thicknesses of material, enhancing the versatility of the machine.

The H7757 is equipped with a powerful 1.5 HP motor, providing ample power to handle tough sanding tasks with ease. The motor is designed for efficiency, offering consistent performance without overheating, allowing woodworkers to tackle lengthy projects without interruption. Additionally, the variable speed control allows users to adjust the speed of the drums, which is crucial for achieving the desired finish on different types of wood.

In terms of technology, the H7757 features precision-machined components that ensure a smooth operation. The machine's construction includes heavy-duty steel, lending durability and stability during use. This robust build minimizes vibrations, contributing to a more controlled sanding process. Furthermore, the inclusion of built-in dust collection ports allows for clean operation, reducing the mess typically associated with sanding projects and improving air quality in the workshop.

The intuitive controls of the Grizzly H7757 make it user-friendly, even for those who may be new to sanding machines. The clear, easy-to-read gauges help monitor the sanding process, ensuring optimal performance. Safety features such as emergency stop buttons and proper guards provide peace of mind while operating the equipment.

Overall, the Grizzly H7757 stands out as a reliable and efficient dual drum sander that combines power, versatility, and user-friendly technology. Whether making precise adjustments, smoothing surfaces, or preparing materials for finishing, this sander is engineered to deliver high-quality results every time. With its durable construction and advanced features, it is an excellent investment for anyone serious about woodworking projects.