Amada CD-A Series, Руководство по эксплуатации

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CHAPTER 4: OPERATING INSTRUCTIONS
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
4-8 990-430
Section III: Operational Notes
Repetition Rate
The repetition rates are different for full monitoring and no monitoring. See Appendix A for repetition
rates.
Automatic Power Turn-Down
The user must limit the power dissipated in the automatic turn-down circuit to the 50W limit listed in
Appendix A, Technical Specifications . Rapid firing of different schedules with significantly different
energy level can exceed this limit. To calculate the total power dissipated in this circuit:
1. Determine how many times in one minute the schedule will change from a higher energy to a
lower energy.
2. Add up the total Watt-seconds of energy decrease in one minute.
3. Divide this number by 60 to determine the average Watts of power dissipated.
Example: If there are 12 schedule changes per minute where the programmed energy decreases
from 300Watt-seconds to 100Watt-seconds, the total change is 2400 Watt-seconds per minute.
Dividing by 60 gives a resultant value of 40 Watts (Watt-seconds per second equals Watts),
which is within the capability of the unit.
Extended Shut-down Procedure
If the CD-A unit has been turned off and non-operational for a period of 3 months or longer, an extended
warm-up sequence is recommended.
1. Turn the unit ON.
2. Set the energy to the maximum level. Example: set the CD-A1000A to 999 Watt Seconds.
3. Fire the unit once.
4. Leave the power ON and wait 15 minutes.
5. Program the desired schedule and resume normal operation.