Milling, Drilling – Smithy GN1300 User Manual
Page 90
6. Too much backlash in the compound
Cause
Solution
• Loose spanner nuts
• Tighten spanner nuts
• Worn Nut
• Replace nut
7. Machine slings oil from behind the chuck or in belt box
Cause
Solution
• Oil reservior overfilled
• Check oil lever
• Worn oil seal
• Replace felt in seal
Milling
1. Tool chatter
Cause
Solution
• Gibs too loose on cross slide,
• Readjust gibs
compound, or carriage
• Unused feeds not locked
• Lock all axes but the one moving
• Millhead not locked
• Lock millhead
• Quill too loose
• Tighten quill lock
• Tool not on center
• Center tool
• Improper tool shape, tool dull
• Reshape, sharpen, or replace tool
• Feed too light or slow
• Adjust feed rate
2. Depth of cut is not consistent
Cause
Solution
• Quill moving
• Lock quill
• Setup wrong
• Make sure setup is parallel to
table
Drilling
1. Hole is off center or bit wanders
Cause
Solution
• Bit dull
• Use sharp bits
• Bit not mounted correctly in chuck
• Remount tool
• Bit bent
• Replace bit
• Chuck loose in spindle
• Remount chuck on arbor
• Drawbar not secured
• Tighten drawbar
• Debris on spindle
• Clean debris and arbor and
remount tool
• Bearing loose or worn
• Tighten or replace bearings
12: Troubleshooting
12-4
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