Description
Fadal Part Number ENC-0004
Genuine Fadal OEM encoder / resolver part. Genuine Fadal OEM electronic replacement part: ENCODER, 1000-LINE; ACCUCODER (SPINDLE MOTOR)
Part Description:
ENCODER, 1000-LINE; ACCUCODER (SPN MOTOR)
Testing Your Spindle Motor Encoder:
One of the most common problems with a Fadal Spindle Drive running in the Vector mode is caused by the spindle motor encoder. Missing encoder pulses will basically confuse the drive and cause vector miscalculations which result in too much current output to the motor. One sign is that the load meter will usually "peg" or pulsate. Another sign is the RPM will not be stable. Too often the drive is misdiagnose as being "bad" when it's actually the encoder causing the problem.
The best method of testing a Fadal Spindle Motor Encoder is to use a oscilloscope to view the A/B channels. Pulse errors can easily be detected. With the older Baldor drives, as you rotate the spindle, the drive keypad will display the calculated rpm.
One simple way to manually test an encoder is by using a FLUKE meter, set it to AC input. When checking from the encoder supply power common to one of the A+,A-,B+,B- encoder signals on the spindle drive encoder input terminal, you should see approximately 2.8 VAC when turning the spindle at the orientation speed. The digital pluses look like an AC voltage to a FLUKE meter.
Another important way to test the encoder is by checking the state of each channel. With a voltmeter in the DC setting, from encoder supply power ground to the A+ encoder input, you should measure either 0 or 3.5 VDC. The measured state is either high or low. If A+ is high (3.5 volts) then the A- channel must be low; A+ and A- can never be the same. The same logic goes for the B+ and B- channels. If you rotate the spindle and let it stop, you'll should see the states changing.
More Information:
Fadal Tech Manuals - A Complete Documentation Resource
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Here are four key examples of the Total Support our customers receive:
1) Diagnose - Direct help in determining if you really do need to replace the part. Based on experience having worked as part of the engineering team that originally designed the Fadal machine, our knowledge helps us determine if there's other elements in the system that need to be addressed before replacing the part.
2) Documentation - We provide very simple and concise information on this site on how to install and get your replacement in and running. With our documentation, we also include Preventative Maintenance tips to help avoid future failures.
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4) Support - With the combination of our Fadal Engineering background and direct interaction with suppliers engineers, you are getting the absolute best product support possible at installation and beyond.
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