Tweco PakMaster 50XL Plus - Manual (Page 22)

SECTION 3: INSTALLATION PROCEDURES 16 Manual 0-2744
Access
Panel
Screw
Latch
A-02467
Figure 3-9 Front Access Panel
2. Lift up on the access panel to gain access to the torch
bulkhead panel.
CAUTION
This system is designed for use with the PCH/M-
40 torch only. Do not connect any other torch to
this power supply.
3. Remove the Strain Relief Nut from the Strain Relief
supplied on the end of the Torch Leads.
Strain Relief
Nut
Strain Relief
Torch Leads
Assembly
A-02514
Figure 3-11 Torch Strain Relief Nut
4. Feed the end of the torch leads through the hole in the
front panel in the following order:
• Control Cable
• Gas lead
• Pilot Lead
5. Place the Strain Relief Nut over the torch leads and
position it in the hole in the front panel.
6. Hold the Strain Relief Nut in position and tighten the
Strain Relief on the outside of the unit.
7. Connect the torch gas/power lead fitting onto the Gas/
Power Lead Connection.
3.10 Work Cable And Ground
Connections
A. Electromagnetic Interference (EMI)
Pilot arc initiation generates a certain amount of electro-
magnetic interference (EMI), commonly called RF noise.
This RF may interfere with other electronic equipment
such as CNC controllers, etc. To minimize RF interfer-
ence, follow these grounding procedures when install-
ing mechanized systems:
B. Creating an Earth Ground
1. Install a ground wire (not included) between the sys-
tem and a solid earth ground (also called star ground).
To create a solid earth ground, drive a 1/2 in (12 mm)
diameter copper rod at least 6 - 8 ft (1.8 - 2.4 m) into
the earth so that the rod contacts moist soil over most
of its length. The required depth will vary depend-
ing on location (see NOTE). Locate the rod as close as
possible to the power supply. The work table should
be connected to the same earth ground as the power
supply.
NOTE
A properly installed ground rod will have a resis-
tance of one ohm or less.
2. Connect the control device (CNC) to a separate earth
ground similar to the ground rod described above.
The ground cable should be at least 12 gauge (4 mm
2 )
wire.
3. To minimize RF interference, position torch leads as
far as possible (at least 1 ft or 0.3 m) from any CNC
components, drive motors, control cables, or primary
power lines.
4. Keep torch leads clean. Dirt and metal particles bleed