Walter ICECUT300 Manual De Instrucciones página 14

15) SOLUTIONS TO HOLE MAKING PROBLEMS
Problem
1) Magnetic base Material being cut may be too thin for efficient
won't hold holding.
effectively
Swarf or dirt under magnet.
Irregularity on magnet contact or work-piece.
Insufficient current going to magnet during drilling
cycles.
2) Cutter skips Magnetic base is not holding effectively.
out of centre-
punch mark at Worn arbor bushing and/or ejector collar.
start of cut
Too much feed pressure at start of cut.
Cutter is dull, worn, chipped or incorrectly
sharpened.
Poor centre-punch mark; weak pilot spring; pilot
not centred in centre-punch mark.
Worn or bent pilot, worn pilot hole.
Loose bolts on motor bushing support bracket,
main casting or loose gib adjusting set screws.
3) Excessive Incorrectly re-sharpened, worn or chipped cutter.
drilling pressure
required Coming down on swarf lying on surface of work-
piece.
Gibstrips out of adjustment or lack of lubrication.
Swarf accumulated (packed) inside cutter.
4) Excessive Steel swarf or dirt under cutter.
cutter breakage
Incorrectly re-sharpened or worn cutter.
Cutter skipping.
Slide needs adjustment.
Cutter not attached tightly to arbor.
Insufficient use of cutting oil or unsuitable type of
oil.
Incorrect speed
5) Excessive See cause and remedy above
cutter wear
Incorrectly re-sharpened cutter.
Insufficient or spasmodic cutting pressure.
Cause
14
Remedy
Attach an additional piece of metal under the magnet,
or mechanically clamp magnetic base to work-piece.
Clean magnet.
Use extreme care; file any imperfections flush to
surface.
Confirm power supply and output from control unit,
check supply cable.
See causes and remedies above.
New arbor bushing is needed.
Light pressure only is needed until a groove is cut. The
groove then serves as a stabilizer.
Replace part or parts.
Improve centre-punch and/or replace worn parts
Replace part or parts.
Adjust where necessary.
Re-sharpen or replace.
Take care not to start a cut on swarf.
Adjust setscrews and lubricate.
Clear cutter.
Remove cutter, clean part thoroughly and replace.
Always have a new cutter on hand to refer to for
correct tooth geometry, together with instruction
sheet.
See causes and remedies (2).
Tighten grub screws supporting the slide.
Retighten.
Inject oil of light viscosity into the coolant-inducing ring
and check that oil is being metered into cutter when
pilot is depressed. If not, check pilot groove and arbor
internally for dirt or apply oil externally. (Even a small
amount of oil is very effective).
Ensure correct gear is used for the cutter.
Refer to instructions and a new cutter for proper tooth
geometry.
Use sufficient steady pressure to slow the drill down.
This will result in optimum cutting speed and chip load.