WerkMaster Cobra - Safe Operating Conditions; Modifications Warning; Power and Connectivity

OPERATOR’S)MANUAL))
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the cord is the grounding wire. NEVER connect this wire to other than the
grounding pin of the attachment plug.
• Be sure all safety decals on the machine can be clearly read and
understood. Replace damaged or missing decals immediately.
• Maintain WerkMaster machines in safe operating condition with all guards
in place and secure, all mechanical fasteners tight, all controls in working
order, and the grinder configured for the job application whether concrete,
stone, terrazzo, wood or other surfaces.
• To prevent damage to your machine or severe personal injury, avoid
protruding slab inserts, nails, screws, Hilti anchors, rebar, embedded bolts
or any other debris, pipe extensions, machinery bases, or any objects that
transmit sudden shock to the grinding assembly.
• Inspect the tooling carefully before installing. DO NOT use any tooling that
exhibits signs of damage, as severe personal injury or damage to the
equipment could result.
• NEVER leave WerkMaster machines running unattended.
• Risk of Explosion: Grinding/polishing concrete surfaces and sanding/finishing
wood floors can result in an explosive mixture of fine dust and air. Use this
machine only in a well-ventilated area free from any flame, match or
combustibles materials.
Dust generated from sanding wood floors can spontaneously ignite or
explode. Promptly dispose of any sanding dust in a metal container clear of
any combustibles. Do not dispose of in a fire.
• DO NOT modify WerkMaster machines. Modifications will void the
warranty and may result in injury to persons and damage to the machine.
POWER AND CONNECTIVITY
WerkMaster machines are outfitted with a variable-frequency drive (VFD) that
allows the desired grinding speed to be selected. Along with controlling the
speed of the machine, the VFD features include the following:
• Undervoltage protection (damages most single-phase motors)
• +/- 10% voltage protection
• 60 Hz and 50 Hz capability (international)
• Wide voltage range (200–230V)
• Soft start (smaller generator requirements)
• Monitor pad speed display
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NEVER open the VFD panel while plugged in or immediately after
unplugging the power cord. Severe injury or death may result.
Safe Operating Conditions
Modifications
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