Tweco SC-3000 - Manual (Page 59)

SC-3000
Manual 0-5100 4-19 OPERATION
4.12 Parameter Setting
Pierce Height
• Initial height to which torch is positioned above the work piece during height finding process. Set
in increments of 0.004” (0-1.000”) or tenths of mm (0-25.0mm).
• Enter a height low enough for reliable transfer. Use Elevation Height to raise torch higher to com-
plete pierce while minimizing blow back to the torch.
Note
Standard cut charts list Pierce Height as high as possible for height controls that don’t have Elevation Height. Find-
ing height in a piece of slag can result in being too high to transfer. A lower Pierce Height can increase transfer
reliability when used with Elevation Height to raise torch above the piercing blowback immediately after transfer.
Feature is especially useful for piercing thicker material.
Pierce Delay (Height Control Setting, not to be confused with CNC controller setting to delay
motion)
• Sets Pierce Delay in tenths of seconds (0-9.9 sec)
• Pierce delay in the Height Control is time torch remains at Pierce Height or Elevation Height be-
fore moving to Cut Height.
• See "Correct use of THC Pierce Delay and CNC Motion Delay" later in this section for detailed
explanation of how to set Height Control Pierce Delay and CNC controller pierce or motion delay.
Cutting Height
• Selects desired cutting height in increments of 0.004” (0-0.800”) or tenths of mm. (0-20.0 mm.)
• Following pierce delay, THC moves torch to cut height, samples arc V. and at end of Control Delay
regulates to sampled arc V. (See Control Delay).
Elevation Height
• Distance to raise torch above Pierce Height. Set in increments of 0.004” (0-1.020”) or tenths of
mm. (0-25.5 mm)
• Immediately after arc transfer, torch is raised above the initial Pierce Height to Elevation Height.
Use Elevation Height to raise torch higher to complete the pierce while minimizing blow back to
the torch.
• Using Elevation Height allows setting a somewhat lower Pierce Height increasing the transfer reli-
ability while further protecting the torch from blowback because it can immediately rise beyond
Pierce Height.