Operation and Work Results

Symptom

Possible Cause

Possible Solution

Tool slips in collet.

1.

Collet is not fully drawn up into

1.

Snug up draw bar.

 

 

spindle taper.

 

 

 

2.

Wrong size collet.

2.

Measure tool shank diameter and match with

 

 

 

 

appropriate diameter collet.

 

3.

Debris in collet or in spindle taper.

3.

Remove all oil and debris from collet and spindle

 

 

 

 

taper.

 

4.

Taking too big of a cut.

4.

Lessen depth of cut and allow chips to clear.

 

 

 

 

 

Breaking tools or cutters.

1.

RPM and or feed rate is too fast.

1.

Set correct RPM and feed rates.

 

2.

Cutting tool getting too hot.

2.

Use coolant fluid or oil for appropriate application.

 

3.

Taking too big of a cut.

3.

Lessen depth of cut and allow chips to clear.

 

4.

Spindle extended too far down.

4.

Fully retract spindle and lower headstock. This

 

 

 

 

increases rigidity.

 

 

 

 

 

Machine is loud when

1.

Excessive depth of cut.

1.

Decrease depth of cut.

cutting. Overheats or bogs

2.

Dull cutting tools.

2.

Use sharp cutting tools.

down in the cut.

 

 

 

 

 

 

 

 

 

Workpiece vibrates or

1.

Table locks not tight.

1.

Tighten down table locks.

chatters during operation.

2.

Quill lock not tight.

2.

Tighten quill lock.

 

3.

Workpiece not securely clamped to

3.

Check that clamping is tight and sufficient for the

 

 

table or into mill vice.

 

job. Make sure mill vice is tight to the table.

 

4.

RPM and feed rate too high.

4.

Use appropriate RPM and feed for the job.

 

5.

Spindle extended too far down.

5.

Fully retract spindle and lower headstock. This

 

 

 

 

increases rigidity.

 

 

 

 

 

Table is hard to move.

1.

Table locks are tightened down.

1.

Make sure table locks are fully released.

 

2.

Chips have loaded up on ways.

2.

Frequently clean away chips that load up during

 

 

 

 

milling operations.

 

3.

Ways are dry and in need of lubri-

3.

Lubricate ways and handles.

 

 

cation.

 

 

 

4.

Limit stops are interfering.

4.

Check to make sure that all limit stops are floating.

 

5.

Gibs are too tight.

5.

Adjust gibs (see Page 33).

 

 

 

 

 

Bad surface finish.

1.

Wrong RPM or feed rate.

1.

Adjust for appropriate RPM and feed rate.

 

2.

Dull cutting tool or poor cutting tool

2.

Sharpen cutting tool or select a better cutting tool for

 

 

selection.

 

the intended operation.

 

3.

Wrong rotation of cutting tool.

3.

Check for proper cutting rotation for cutting tool.

 

4.

Workpiece not securely clamped.

4.

Secure properly.

 

5.

Spindle extended too far down.

5.

Fully retract spindle and lower headstock. This

 

 

 

 

increases rigidity.

 

 

 

 

 

-32-

G3358 Milling/Drilling Machine

Page 34
Image 34
Grizzly G3358 owner manual Operation and Work Results