Instructions

do the job. Overtightening may damage threads or warp parts, thereby reducing accuracy
and effectiveness.
20. Don’t use your lathe for grinding—The fine dust that results from the grinding
operation is extremely hard on bearings and other moving parts of your tool. For the same
reason, if the lathe or any other precision tool is kept near an operating grinder, it should
be kept covered when not in use.
21. Don’t let long, thin stock protrude from the back of the spindle—Long, thin stock
that is unsupported and turned at high RPM can suddenly bend and whip around.
22. Wear your safety glasses—Foresight is better than NO SIGHT! The operation of
any power tool can result in foreign objects being thrown into the eyes, which can result
in severe eye damage. Always wear safety glasses or eye shields before commencing
power tool operation. We recommend a Wide Vision Safety Mask for use over spectacles
or standard safety glasses.
23. Checking/changing computer power supply voltage settings—Sherline attempts to
ship each CNC computer set to the proper voltage for the customer’s country. Customers
outside the USA should check this setting to confirm it is correct before plugging in the
computer for the first time. If you need to change the voltage setting, there are two
switches. You must change both the 115V/230V power switch on the back of the
computer and the switch on the side of the driver board power supply inside the computer
case. For proper procedure, see Part I, System Components and Connections further on in
these instructions.
24. Static electricity can damage your computer—If the case must be opened, be sure
you are properly grounded before touching any components inside your computer. A
spark of static electricity can damage delicate circuits in some components in your
computer. Either wear an approved static electricity grounding strap around your wrist or
touch the case of the computer with one hand before touching any components with your
other hand.
25. Be sure you know what will happen BEFORE pushing the [START] button—
Run your program in [BACKPLOT] mode before running the actual part to make sure it
will run the path your are expecting. Make sure your machine is in the proper home
position before starting the operation.
Electrical Connections
The power cord supplied is equipped with a 3-prong grounding plug that should be
connected only to a properly grounded receptacle for your safety. Should an electrical
failure occur in the motor, the grounded plug and receptacle will protect the user from
electrical shock. If a properly grounded receptacle is not available, use a grounding
adapter to adapt the 3-prong plug to a properly grounded receptacle by attaching the
grounding lead from the adapter to the receptacle cover screw.
Current Requirments
The electrical circuit designed into the spindle motor speed control of your lathe or mill
reads incoming current from 100 to 240 volts AC and 50 or 60 Hz and automatically
adapts to supply the correct DC voltage to the motor. As long as you have a properly
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