Using
Woodworking Machinery
5th in a series of articles by Barb Siddiqui
Few
things are more exciting than taking delivery of a new machine.
After saving the money, doing the research and all the comparative
shopping, finally receiving the box and calling it yours is a great feeling.
Machines:
they will cut, they will drill, they will flatten or chop almost
anything. But you have to take care of them.
Read and understand the owner’s manual, then keep it for later
reference. Once a machine is set up, it still needs to be checked periodically
for alignment, for bolts needing tightening, for lubrication and cleaning.
Learn to
‘tune’ each machine within its tolerances: bandsaw wheels need to run
in the same plane, a drill press needs to raise and lower vertically square
to its table, and a tablesaw blade must be ninety degrees square to its
tabletop, with the front and rear of the blade running parallel to its
miter slots. Books are a good
source of information of this sort.
Before
you load a motor with heavy use, allow it to build up to full force so
it can do its job efficiently. New machines, especially, need to be allowed to run several minutes
before heavy use a first time, to allow the brushes in the motor to ‘seat.’
Learn the sound of the motor on each machine, and pay attention
to how it sounds under the load of an operation.
If something’s wrong, you’ll often be able to hear or feel it from
the machine before things go further a wry.
Don’t
try to work any machine too fast. If a procedure takes excessive force, something
is probably amiss: case hardened wood, or not enough chip clearance for
a blade, or misalignment of essential parts. If you feel the work is overtaxing the machine, find a different
way to do it, or approach the job in smaller steps.
Know
ahead of time where your ‘panic button’ is. Practice holding the work- piece clear of the
blade, then turning the machine on and off. Before you begin, know where that off-switch is, and know how you
are going to get to it. There
are after-market aids to make off-buttons accessible by your knee rather
than fumbling for it by hand.
Always
unplug a machine when handling or changing blades.
That word was ‘Always.’ Not only can bumping a switch give you a nasty
surprise, but faulty switches (even the ‘safer’ magnetic switches) have
been known to connect and come on with a sudden blow to a tabletop, such
as a dropped tool or piece of wood. If
there is a power outage, unplug each machine individually and leave the
lights on to tell you when the power has been restored.
Keep
your machines clean. Vacuum the
dust out of motor vents, off belts, switches, pulleys and inside router
collets. Keep bandsaw tires clean
with a toothbrush and isopropyl alcohol, turning the wheels by hand.
If you have a rack and pinion height adjustment, be sure its teeth
and gear are kept free of sawdust buildup.
When
changing tablesaw blades, be sure the power is disconnected, then clean
any grime off the arbor before replacing its washers and nut. (Quick tip:
if you drop the arbor washer or nut in a pile of sawdust beneath your
tablesaw, a magnet taped to the end of a long dowel will save you a lot
of work in finding it!)
If
you use thin-kerf blades, buy inexpensive blade stabilizers to prevent
blade wander or distortion under a heavy load. They
will limit the depth of cut you can make, but improve the performance
of the blade. There is no need
to overtighten the nut on the arbor, they
are designed to tighten as the blade turns, and overtightening can damage
the arbor. Some tablesaw arbors
are too short for a full stacked dado set and regardless of
the size of the arbor it is not
a good idea to load so many cutters that you have to leave off the arbor
washers. These large washers broaden the applied force of the nut, reducing
the chance of blades slipping.
Check your manual to see how the manufacturer rates your saw for
dado use.
As
a rule, see that your workpiece is securely clamped in place or guided
as it passes a blade. Never cut
freehand on a tablesaw; stabilize the workpiece against a fence or miter
gauge, but don’t use the two together
because that may bind the workpiece against the blade and cause a nasty
kickback or jamming of the blade. A panel-cutting sled riding in the miter
slot, is the safest way to do cross-cuts.
When
using a drill press, clamp the work to the table.
A lot of torque is developed at low speeds, and when backing out
of an operation, the machine tends to lift the work and bind in the hole,
throwing or twisting the wood. It is best to have an auxiliary table with
a fence to place the workpiece against.
With hand held
power tools, before you begin, plan how the electrical cord will pass freely
as you complete the operation, and if your cord is of adequate length (this
is one great advantage of battery-operated tools.)
Be certain a cord isn’t going to snag on something unnecessarily
or coil around your feet.
The
best advice on new machinery is, educate yourself, and practice before
you begin the work. Woodworking is wonderful
hobby, but you are responsible for your own safety.
My
thanks to forum member John Parrish for his editing assitance.
Click
on the links below to see the previous articles by Barb Siddiqui.
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