Cobra Electronics CM/200/3, CM/200/1 manual Remedies for Hole Making Problems

Page 8

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 work-piece where magnet will

 

magnet

be located, or mechanically clamp

 

 

magnetic base to work-piece

 

Swarf or dirt under magnet

Clean magnet

 

Irregularity on magnet face or

Use extreme care, file only

 

work-piece

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

centre-punch mark at

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 re-sharpen. Sharpening

 

incorrectly sharpened

service is available.

 

Poor centre-punch mark;

Improve centre-punch and/or replace

 

weak pilot spring; pilot not

worn parts

 

centred in centre-punch mark

 

 

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

 

 

 

 

7

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Contents Cobra Contents of the Manual Do not USE on D.C. Supply Read Before Using the Machine Safety ProceduresOperating Instructions Speed Selection Extension Cable SelectionCutters and Pilots RCL, RcvlCrwc SRC, Srcv SRA25Remedies for Hole Making Problems Clear cutter Wiring Diagram Exploded View of Complete Machine Parts list for CM/200/1 & CM/200/3 Component Exploded View of Gearbox and Motor Units Part list of motor & gearboxCobra Component Part No. Item Pipe Adaptor KIT RD2311 Wiring of Mains Plug BrownliveYellow REDCutting Speeds Typical cutting speeds RPM for various materialsCutter diameter and speed relationship High gear Low gear To Refit NEW Cable To Remove OLD Cable from Machine