Hypertherm HyPrecision 100D Instruction Manual Download Page 21

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This flushing procedure should be followed after any replacement or service to the high-pressure lines
and fittings have been performed on the pump.

Make sure the pierce pressure control knob is backed out all the way, and the pump pressure is set

10ksi

or less. See

Adjusting the Pump Pressure

in the

Operation

section for more

information.

Remove the cutting head and orifice leaving just the on/off valve body and adapter.

Set the pump pressure to

20ksi

(approximately 1000 psi hydraulic) using the pump compensator.

See

Adjusting the Pump Pressure

in the

Operation

section for more information.

If possible, use your CNC control to make a program that will turn on and off the valve in one-

second increments and run the program in a loop for 15 minutes. This will shock the HP tubing
and free any debris present in the lines.

Any debris that breaks can cause damage to your on/off valve needle and seat. If
this happens, try to complete this procedure by removing all debris from the
components rather than replacing the parts right away.

Replace the sapphire orifice in the cutting head with one that is appropriately sized for your

pump.

Set the pump pressure to

40ksi

(approximately 2000 psi hydraulic) and repeat the program

(above) for another 15 minutes.

Turn the pressure up to

60ksi

(3000 hydraulic) and repeat the program again for 15 minutes.

If necessary, replace the on/off valve needle, seat, and seals as well as any damaged orifices.

Normal Startup Procedure

Verify all safety circuits are connected and operational.

Check the sight gauge to make sure the hydraulic reservoir is full. Add oil as necessary to bring

the oil to an acceptable level. Refer to

Hydraulic Oil

in the

Hydraulic

section of this manual

for instructions on adding oil.

Verify all utilities are connected to the pump and turned on at the plant.

Check for loose hoses and fittings and make sure there are no leaks present.

Press

(PUMP ON)

and verify that the boost pump pressure is

50-115 psi

. The pump will

start generating pressure at the Pressure Set Point 2 (Pierce) for

five seconds

before switching to

Pressure Set Point 1 (Cut).

Refer to the

Pump Operation

section for instructions on setting the pressure set points.

4.4

Pump Operation

After startup inspections have been completed and the machine is running, no further direct action from
the operator is required. Periodically check warning indicators and gauges and inspect everything
visually to ensure developing problems are detected before the equipment is damaged.

Normal Operation

During normal operation, the pump will continue to stroke to meet the cutting water demand. When the
cutting nozzle is closed, the pump will operate on standby; hydraulic pressure remains at the set
pressure and the intensifier is idle. It is normal to see an increase in the pressure of the output water.
This is called the "Dead Head Rise." When the cutting nozzle is turned on the intensifier will begin to
stroke again at a rate to meet the demand.