Symptom

Possible Cause

Possible Solution

Tool slips in spindle.

1.

Tool is not fully drawn up into

1.

Tighten drawbar (Do not overtighten).

 

 

spindle taper.

 

 

 

2.

Debris on tool or in spindle taper.

2.

Clean collet and spindle taper.

 

3.

Taking too big of cut.

3.

Lessen depth of cut and allow chips to clear.

 

 

 

 

 

Breaking tools or cutters.

1.

Spindle speed/feed rate is too fast.

1.

Set spindle speed correctly (Page 26) or use slower

 

 

 

 

feed rate.

 

2.

Cutting tool too small.

2.

Use larger cutting tool and slower feed rate.

 

3.

Cutting tool getting too hot.

3.

Use coolant fluid or oil for appropriate application if

 

 

 

 

possible.

 

4.

Taking too big of a cut.

4.

Lessen depth of cut and allow chips to clear.

 

5.

Spindle extended too far down.

5.

Fully retract spindle and lower headstock. This

 

 

 

 

increases rigidity.

 

 

 

 

 

Workpiece vibrates or

1.

Table locks not tight.

1.

Tighten down table locks.

chatters during operation.

2.

Workpiece not secure.

2.

Properly clamp workpiece on table or in vise.

 

3.

Spindle speed/feed rate is too fast.

3.

Set spindle speed correctly (Page 26) or use slower

 

 

 

 

feed rate.

 

4.

Spindle extended too far down.

4.

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 need lubrication.

3.

Lubricate ways (Page 29).

 

4.

Table limit stops are interfering.

4.

Check to make sure that all table limit stops are not

 

 

 

 

in the way.

 

5.

Gibs are too tight.

5.

Adjust gibs (see Page 34).

 

 

 

 

 

Bad surface finish.

1.

Spindle speed/feed rate is too fast.

1.

Set spindle speed correctly (Page 26) or use a

 

 

 

 

slower feed rate.

 

2.

Using dull or incorrect cutting tool.

2.

Sharpen cutting tool or select one that better suits

 

 

 

 

operation.

 

3.

Wrong rotation of cutting tool.

3.

Check for proper cutting rotation for cutting tool.

 

4.

Workpiece not secure.

4.

Properly clamp workpiece on table or in vise.

 

5.

Spindle extended too far down.

5.

Fully retract spindle and lower headstock. This

 

 

 

 

increases rigidity.

 

 

 

 

 

Model G0758 (Mfd. Since 2/14)

-33-

Page 35
Image 35
Grizzly G0758 owner manual Symptom Possible Cause Possible Solution