Dynamatic CES, Instruction Manual, Page: 9 / 38

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Clutch excitation provides up to 180 Amps peak at 70%
duty cycle. Brake excitation provides up to 90 Amps
peak at 30% duty cycle.
KEYPAD PROGRAMMING
The keypad is mounted integrally with the DMR. It is
connected to the main DMR through a ribbon cable and
is used for viewing and modifying various parameters
within the system. The module consists of the following:
a sealed 20-button, dome-contact type keypad; two
independent sets of 8-digit, 7-segment LED displays;
and a row of 8 individual status LED’s. The keypad can
accept the following entries: numbers 0 through 9. Top,
Bot, up arrow, down arrow, *, #, Ent, F1 & F2. Dat is a
non-functional key. All of the operating modes that are
included on the keypad programmer are shown in Figure
2-1. Each mode includes an LED to indicate when it is
in operation. For information on how to use the keypad,
refer to Operation, Section 3.
FIELD ADJUSTMENTS
Some operator control adjustments can be made in the
field. Potentiometer R116 on the power supply can be
adjusted for +5 volts. Six adjustments can be made on
the main logic PCB (15-822-*) as follows: Clutch Velocity
Damping, Clutch Current Damping, Clutch Current Limit,
Brake Velocity Damping, Brake Current Damping and
Brake Current Limit. These adjustments are explained
in Section 4.
LIGHT EMITTING DIODE (LED) INDICATORS
In addition to the LED noted for the keypad programmer,
LED indicator lights are also located on the printed
circuit boards where operating circuit conditions need to
be known. The printed circuit boards that have LED’s
are described below.
LOGIC INTERFACE INDICATOR PCB (15-242-57):
Refer to Figure 2-2 for the identification of the LEDs
found on this printed circuit board.
CLUTCH GATE DRIVER (15-565-27) AND BRAKE
GATE DRIVER (15-565-28) PCBs: Each LED represents
a phase that is firing when it is on. Refer to Figure 2-3,
for the identification of the LEDs found on these printed
circuit boards.
I/O PCB (15-6502-3001): Refer to Figure 2-4 for the
identification of the LEDs found on this printed circuit
board.
PRESS SPEED CONTROL
The press control provides a closed loop speed control
operation with inner current loops on both the clutch and
brake. It provides adjustable acceleration and
deceleration. The reference data is modified by a press
angle measuring and control circuit that changes the
reference profile at adjustable angles, as shown in
Figure 2-5.
ANGLE MEASUREMENT
The press control provides a means of measuring press
angles by utilizing a position resolver mounted on the
output gearing of the press drive. The position
information is then used to set a reference profile based
on stored data of up to 6 angles and 6 predetermined
speeds. Details are further described under "CES
Digital Master Regulator (DMR)" and "Press Operating
Modes."