Thermal Comfort 3000 manual Troubleshooting Guide, Standoff Control, Gas Control

nector and an internal terminal strip are provided for CNC connections. The remote includes internal con- nections to interface to the SC10 standoff control so the single remote cable works for both.

A Merlin 3000 system may include the following:

•No Remote Control (RC6010)

•Remote Control Only (RC6010)

•Remote Control Only (RC6010) With Standoff Control (SC10)

When an RC6010 is included the CNC signals are con- nected to the RC6010 through the rear panel CNC connector, J29, or may be wired directly to J6, a termi- nal strip inside the RC6010. All CNC inputs are opti- cally isolated to reduce noise interference. The RC6010 allows remotely controlling the cutting current, set- ting reduced current for corner slowdown and select- ing gas PURGE and SET functions. A digital AMPS display allows accurate setting and monitoring of the output current. An ENABLE switch shuts down the power supply and coolant pump for changing torch consumables.

H. Standoff Control

1. Model SC10 Standoff Control

The Standoff Control (SC10) includes an ARC VOLTS display, a control to set the desired arc voltage as well as PIERCE HEIGHT, PIERCE DE- LAY and END OF CUT RETRACT (%). There are also manual UP and DOWN switches. The Stand- off Control operates a lifter motor assembly mov- ing the torch vertically to control torch tip to work distance.

When used with the Remote Control (RC6010) all inputs and outputs to the Standoff Control (ex- cept lifter motor drive) is via an internal ribbon cable between Remote Control (RC6010) J5 and Standoff Control (SC10) J7. No additional con- nections are required between Standoff Control and Power Supply.

2. Model SC11 Standoff Control

Standoff Control (SC11) is used without a Remote Control (RC6010). The Standoff Control has ad- ditional connectors on the rear panel, J40 for CNC, J41 for EXT PWR and J42 for plasma (labeled PL). A remote cable connects from the Power Supply J15 to both J41 and J42 carrying power and sig- nals to the Standoff Control. Connector J40 ac- cepts the same CNC cable as the Remote Control (RC6010) and like the Remote Control it has an internal terminal strip, J11. Connections J40 and J11 have only START/STOP, CSD, and OK-To-

Move signals which are optically isolated. A re- mote cable connects from the Power Supply to connector J41 supplying the Standoff Control power. The cable connected to J42 supplies con- trol signals between Power Supply and the Stand- off Control. Refer to the individual Instruction Manuals supplied with the equipment for more detailed information.

The Power Supply must have an enable switch connected to the terminal strip, TB2, inside the Power Supply when the Standoff Control (SC11) is used.

NOTE

Refer to Appendix VIII for a Signal Flow Block Diagram of the main functions.

I. Gas Control

The Gas Control (GC3000) consists of additional gas solenoids mounted on the Power Supply rear panel. A remote switch box is used to select the desired Plasma and Secondary gases. Up to four plasma and three secondary gases can be connected to the mani- folds and selected by the Gas Control. The secondary water input to the Power Supply may also be selected from the Gas Control.

4.04 Troubleshooting Guide

A. Troubleshooting and Repair

Troubleshooting and repairing the this unit is a process which should be undertaken only by those familiar with high voltage high power electronic equipment.

WARNING

There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to diagnose or repair unless you have had training in power electronics measurement and troubleshoot- ing techniques.

B. Advanced Troubleshooting

NOTE

For basic troubleshooting and parts replacement procedures refer to Merlin 3000 Power Supply Op- erating Manual 0-2532.

SERVICE TROUBLESHOOTING 18 Manual 0-2533