7
Fig 9
Contact grinding:
Lock the grinding arm in horizontal
position.
Loosen the clamping screw (O, Fig
10) and open the guard.
Lock the guard in place.
Fig 10
Warning:
The condition of the abrasive wheel
should be checked before each
machining process.
Work only with flawless abrasive
wheel.
Do not allow anyone to stand behind
the unit or close to the workpiece
where debris can be thrown.
Flying sparks will occur when
grinding. They can cause injury and
ignite flammable materials.
Use safety goggles at all times.
Use ear protection at all times.
Wear a face and dust mask when
working in a dusty environment.
Ensure that the wheel and belt
guards are in the correct position
before you start machining.
Keep the tool rest and spark guard to
within 2mm of the grinding wheel.
Allow the abrasive wheels to reach
full speed before machining.
Do not use the side of the grinding
wheel; this puts dangerous stress on
the wheel.
Do not stop the wheel by side
pressure.
Do not touch the machined workpiece
until it cools or you may be burned!
Never place your hand near the
grinding area while machine is in
operation.
Never machine pieces that are too
small to hold safely.
Support long work pieces with helping
roller stands.
7. Setup and adjustments
7.1 Changing the abrasive wheel
The abrasive wheel may
only be changed when
the mains plug is pulled!
The abrasive wheel has to meet the
technical specification.
Use only abrasive wheels rated at
3000 RPM or higher.
Check abrasive wheel for flaws
(cracks) before installation.
Make the ring test.
Ring test:
An internal defect may not be
apparent by visual inspection alone.
The ring test may uncover an internal
crack or void.
Loop a piece of string through the ing
wheel hole and suspend the wheel.
Tap the wheel with a piece of scrap
wood.
A good wheel will "ring"; a defective
wheel will "thud".
Do not use a wheel that does not
“ring”.
To change the wheel:
Disconnect grinder from the power
source.
Remove the tool rest (F, Fig 2) and
move the spark guard (Z) away from
the wheel.
Remove the wheel cover (E, Fig 11).
Fig 11
Remove the nut (X), clamping flange
(W) and abrasive wheel (V).
Clean the clamping flange.
To install the new abrasive wheel
reverse the process.
Do not over tighten the nut; this may
cause the wheel to crack.
Replace the wheel cover.
Adjust the spark guard and tool rest
to a clearance within 2mm from the
wheel.
Plug in.
Before starting the grinder, turn the
wheels by hand making sure they
turn freely.
Run the unit and check to make sure
the abrasive wheel is in good
condition.
When testing a new abrasive wheel,
run the unit for 3 minutes.
Note:
Always stand on one side when
turning on the unit.
7.2 Adjusting the spark guard
As the wheel wears down, the spark
guard must be re-adjusted to
maintain a maximum 2mm clearance
(Fig 3).
7.3 Adjusting the tool rest
As the wheel wears down, the tool
rest must be re-adjusted to maintain a
maximum 2mm clearance (Fig 8).
7.4 Changing the abrasive belt:
Remove the belt guard (Q, Fig 12).
Loosen the belt tension, swing belt
tension lever (C, Fig 5) upwards.
