Rotabroach SMARTPANTHER1, Manual

Page: 8 / 20

Issue 3 Original version March 2012
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ALWAYS DISCONNECT THE MACHINE FROM THE POWER SOURCE BEFORE CHANGING CUTTERS.
6) MOUNTING OF CUTTERS

The machine has been made to accept cutters having 19.05mm (3/4”) dia. shanks.

The following procedure is to be used when mounting cutters.

Lay the machine on its side with feed handles uppermost, ensuring arbor is wound down to its lowest point to enable
access to socket screws RD4066.

Take appropriate pilot and place through the hole in cutter shank. Insert shank of cutter into bore of arbor, ensuring
alignment of two drive flats with socket screws.

Tighten both screws using hexagon key.
6) REMEDIES FOR HOLE MAKING PROBLEMS
Problem Cause Remedy
1) Magnetic base
won’t hold
effectively Material being cut may be too thin for efficient
holding.
Swarf or dirt under magnet.
Irregularity on magnet contact or work-piece.
Insufficient current going to magnet during drilling
cycles. Attach an additional piece of metal under work-piece where
magnet will be located, 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.
2) Cutter skips
out of centre-
punch mark at
initiation of cut Magnetic base is not holding effectively.
Worn arbor bushing and/or ejector collar.
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. See causes and remedies above.
Replace! Only a few thousandths wear permissible. New arbor
bushing is needed.
Light pressure only is needed until a groove is cut. The groove
then serves as a stabilizer.
Replace or re-sharpen. Sharpening service is available.
Improve centre-punch and/or replace worn parts
Replace part or parts
Adjust where necessary
3) Excessive
drilling pressure
required Incorrectly re-sharpened, worn or chipped cutter.
Coming down on swarf lying on surface of work-
piece.
Gibs out of adjustment or lack of lubrication.
Swarf accumulated (packed) inside cutter. Re-sharpen or replace.
Take care not to start a cut on swarf.
Adjust setscrews, and lubricate.
Clear cutter.
4) Excessive
cutter breakage Steel swarf or dirt under cutter.
Incorrectly re-sharpened or worn cutter.
Cutter skipping.
Slide-ways need adjustment.
Cutter not attached tightly to arbor.
Insufficient use of cutting oil or unsuitable type of
oil. 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 sideway.
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).
5) Excessive
cutter wear See cause and remedy above
Incorrectly re-sharpened cutter.
Insufficient or spasmodic cutting pressure.
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.