M1109 Combo Lathe/Mill
Troubleshooting
This section covers the most common lathe problems. DO NOT make any adjustments until the lathe is disconnected from power and all moving parts have come to a complete stop.
Motor & Electrical
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Motor will not | 1. | Incorrect lathe operation. | 1. | Use the spindle direction ON/OFF lever. |
start. | 2. | Main power switch is OFF. | 2. | Turn the main power switch ON at the back of the |
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| lathe. |
| 3. | Emergency switch is pushed in. | 3. | Rotate emergency switch so it pops out. |
| 4. | Circuit breaker or fuse is at fault. | 4. | Seek an electrician to troubleshoot and repair the |
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| shop power supply. |
| 5. | No voltage or open connection. | 5. | Test circuit, replace wires and connections as |
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| 6. | Motor is at fault. | 6. | Replace motor. |
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Fuses or circuit | 1. | Short circuit in line cord or plug. | 1. | Inspect cord or plug for damaged insulation and |
breakers trip |
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| shorted wires. |
open. | 2. | Short circuit in motor or loose connections. | 2. | Inspect all connections on motor for loose or |
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| shorted terminals or worn insulation. |
| 3. | Incorrect fuses or circuit breakers in power | 3. | Install correct fuses or circuit breakers. |
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Carriage hard to | 1. | Chips have loaded up on bedways. | 1. | Frequently clean away chips that load up during |
move. |
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| turning operations. |
| 2. | Bedways are dry and in need of lubrication. | 2. | Lubricate bedways and handles. |
| 3. | Longitudinal stops are interfering. | 3. | Check to make sure that stops are floating and not |
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| hitting the center stop. |
| 4. | Gibs are too tight. | 4. | Loosen gib screw(s) slightly. |
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Machine is loud | 1. | Excessive depth of cut. | 1. | Decrease depth of cut. |
when cutting. | 2. | RPM or Feed Rate wrong for operation. | 2. | Refer to RPM Feed rate chart for appropriate rates. |
Overheats or | 3. | Dull cutters. | 3. | Sharpen or replace cutters. |
bogs down in the |
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cut. |
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Bad surface fin- | 1. | Wrong RPM or feed rate. | 1. | Adjust for appropriate RPM and feed rate. |
ish. | 2. | Dull tooling or tool not centered correctly. | 2. | Sharpen tooling and/or center tool correctly. |
| 3. | Too much play in gibs. | 3. | Tighten gibs. |
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Gear change | 1. | Gears not aligned in headstock. | 1. | Rotate spindle by hand until gear falls into place. |
levers will not |
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shift into posi- |
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tion. |
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Can't remove | 1. | Quill had not retracted all the way back into | 1. | Turn the quill handwheel until it forces taper out |
tapered tool |
| the tailstock. |
| of quill. |
from quill. |
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SERVICE
