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