conversion to MYPlasma CNC

Overview

• Table: 2013 Technocnc Plasma
• Build: DC Brushed Servos, 3-axis (X, Y, Z)
• Y-axis location: underneath and down the middle
• Torch Height Control (THC) system: Proma Compact THC 150 setup
• Control system: MYPlasma CNC

Parts

• MYPlasma CNC controller
• DC Servo drivers (attachments 234, 235)
• Leadshine 810 model drivers
• High temp 3D printer (metal plates for transmission)

Steps

Setup

1. Clean and lubricate motors 2. Adjust motors 3. Install MYPlasma CNC controller 4. Configure DC Servo drivers for step-dir inputs 5. Set up THC

Calibration

1. Set microstepping and move per revolution 2. Trial and error to align requested move with actual move (e.g., 4in move to do a 4in move)

Cutting

1. Adjust torch height 2. Cut parts and verify dimensions

Notes

• DC Servos typically have -10/+10 input to move them
• MYPlasma CNC controller has touch sensor and height control
• MYPlasma CNC is designed for cutting images rather than precise G-code
• Leadshine 810 model drivers convert step-dir inputs to high voltage for DC servos (around 60 volts)
• Successful cut of 3in x 4in aluminum part with close tolerance
• Torch height adjustment required for precise cuts

Problem

• Exact tolerances not attainable with MYPlasma CNC
• Torch height too high initially

Solution

• Trial and error to calibrate requested move to actual move
• Adjust torch height to achieve precise cuts (e.g., 3.543 requested, 3.525 final cut)

Summary

• Conversion of a 2013 Technocnc Plasma table to MYPlasma CNC control system
• Use of DC Servo drivers for step-dir inputs
• Successful cutting of parts with close tolerances

Key Points

• MYPlasma CNC is suitable for image cutting but not for exact G-code dimensions
• DC Servo drivers (Leadshine 810 model) are necessary for controlling DC Servos
• Calibration and torch height adjustment are crucial for precise cuts