RLL233 | Issue 4 Aug 2007 |
[7]REMEDIES FOR HOLE MAKING PROBLEMS
Problem | Cause | Remedy |
1) Magnetic base | Material being cut may be too | Attach an additional piece of metal |
won't hold effectively | thin for efficient holding of | under |
| magnet | be located, or mechanically clamp |
|
| magnetic base to |
| Swarf or dirt under magnet | Clean magnet |
| Irregularity on magnet face or | Use extreme care, file only |
| imperfections flush to surface | |
| Insufficient current going to | Confirm power supply and output |
| magnet during drilling cycle | from control unit. |
|
|
|
2) Cutter skips out of | Magnetic base is not holding | See causes and remedies above |
effectively |
| |
initiation of cut |
|
|
| Worn arbor bearing and/or | Replace! Only a few thousandths |
| ejector sleeve | wear permissible. |
| Too much feed pressure at | Light pressure until a groove is cut. |
| start of cut | The groove then serves as a |
|
| stabilizer. |
| Cutter is worn, chipped or | Replace or |
| incorrectly sharpened | service is available. |
| Poor | Improve |
| weak pilot spring; pilot not | worn parts |
| centred in |
|
| Worn or bent pilot, worn pilot | Replace part or parts |
| hole |
|
| Loose bolts on arbor bearing | Adjust where necessary |
| support bracket or loose gib |
|
| adjusting set screws |
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