Centroid Acorn Plasma Users Manual Beta CNC12 v4.65 rev6
Overview: Centroid Acorn Plasma CNC controller Setup and Commissioning Steps
Perform these setup tasks in order.
1.) Acorn Bench Test and then the THC kit Bench Test. It is imperative to bench test both the Acorn and the THC
boards (RX and TX) Before installing in a cabinet or hooking up to the Plasma Unit.
2.) CNC control wiring and configuration using the Acorn Wizard.
(See the Acorn Installation manual for non plasma related wiring and configuration such as axis motor drive wiring
and setup, overall turns ratio, homing options etc.
https://www.centroidcnc.com/centroid_diy/downloads/acorn_documentation/centroid_acorn_install_manual.pdf
If using open loop stepper motors it is imperative that the motor,drive and power supply be matched/balanced and
configured properly. Be sure to follow the guidance found here from GeckoDrive.
https://www.geckodrive.com/support/step-motor-basics.html
It is imperative that the mechanical design of the machine operates in the 1 to 2 turns of the axis motor yields 1” of
travel on the X and Y axes. Direct ‘Axis motor to Rack Pinion’ driven machines do not provide the best cutting
results. A gear box or belt reduction is highly recommended on rack driven machines so one rotation of the axis
motor will result in at least 1” of axis travel. Typical gear box ratios used on rack drive Plasma machines are 5:1 and
3:1. ( which one you use depends on the pinion diameter being used).
Ensure Machine design is in the “Plasma Sweet Spot” before proceeding.
3.) Choose Torch Touch off Method and follow THC Wiring and Plasma specific setup information in this document.
4.) Verify Torch Touch Off and Breakaway functionality
5.) Verify basic torch function with the Torch Test Fire button on the VCP.
6.) Load a Profile using the Centroid Profile manager to select a Profile to match the material to test cut with.
7.) Run the Arc Voltage Calibration macro.
8.) Load and cut the Centroid test plate plasma G code program to verify operation.
Page 1 D:\Keith Documents\centroid_acorn_plasma_users_manual_draft27.odt rev27 3-15-22
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