INSTALLATION & OPERATION MANUAL
19 | P a g e w w w . n t e n g i n e e r s . i n
140v and the dead band is set to 2 volts then the THC would not move the torch when the
actual voltage is between 139 to 141 volts. Only once the voltage cross this band the correction
would take place. This is used to avoid over corrections in the THC.
3. AVC Response time
This is the time in milliseconds that the THC averages the ARC voltages
and then takes action. If the cutting speed is high then this time should be
kept low for quick actions. If the cutting speed is slow this should be kept
higher. This setting can also be fine tuned by observing the THC during a
cut and then increasing or decreasing the THC response time accordingly.
4. Float Sw Offset
When the Initial height sensing is done by floating switch instead of ohmic,
most lifter designs over travel a bit after the torch touches and before the
floating switch triggers. This over travel can be compensated by raising the
torch by the
Float Sw Offset + Pierce height
when the IHS operation is done using the floating switch.
This ensures the same pierce height is maintained irrespective of the HIS
being done by Ohmic Sensing or the floating switch mechanism.
5. Float Input Logic
The floating input connection logic can be changed from Active High to Active Low using this
setting. This setting is available to accommodate different lifter designs and floating
mechanisms being used by difference manufactures.
6. Float as Collision
The floating switch can be used as a collision signals when this setting is enabled. The THC
would withdraw the Plasma Start and Ok to Move (Motion) Signal to stop the cutting if this
setting is enabled and the floating switch is triggered during the cutting operation.
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