Walker Magnetics IMI 100D, Руководство по эксплуатации

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800-WMAGNET
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4.6 Control Protection
If the control is switched into sudden high power operation with too large a load, the AC fuse may blow before the electronic
protective circuits can function.
If the chuck control is overloaded by a short circuit or a chuck too large for this control’s rating, the control will sense this
condition and will attempt to protect itself by flashing all the system indicator lights, and the control will not respond to any
function selection. This will continue until AC power is removed from the control and the problem is corrected.
The logic section of the Main PC Board is protected by a .125A fuse in location F1. This fuse will blow if a problem occurs in
the logic section.
If AC power is interrupted while the control is running, the control returns to the mode of operation selected just prior to loss
of power. This allows easy resumption of machining after an AC line dropout.
4.7 Release Cycle Steps
The Release Cycle removes residual magnetism in the chuck and workpiece by sending decreasing, alternating pulses of DC
voltage through the chuck coils. The amount of demagnetization (DEMAG) depends upon the number of pulses, the length
of time that the pulses are applied (T = Pulse width) and the time between pulses (t = Off Time). The first pulse is always
negative. The pulse voltages are determined automatically by the chuck control software. The number of demagnetization
pulses are adjustable from one to sixteen (1-16). The pulse width and off time are automatically adjusted by the on-board
microprocessor. See Figure 4 1.
Figure 4-1 Release Cycle Voltage VS. Release Cycle Time