(In alpha state)
- Forked from: https://openbuilds.com/builds/standalone-torch-height-controller-for-cnc-plasma-cutting.9571/
THC_Remote reads and sends plasma voltage to THC_Controller to adjust torch voltage to target value.
Designed for Plasma cutters without isolated 50:1 output.
Arc Voltage is used to estimate the distance to the workpiece from the torch head. The plasma voltage is used calculate the torch height to change the voltage to a setpoint.
FastPID Library by Mike Matera The FastPIDPID Library is available in the Arduino IDE Library Manager Latest version on GitHub: https://github.com/mike-matera/FastPID Version Used: v1.3.1
EasyNextionLibrary by Athanasios Seitanis contact: [email protected] The EasyNextionLibrary is available in the Arduino IDE Library Manager From: https://github.com/Seithan/EasyNextionLibrary Version Used: v1.0.6
AccelStepper by Mike McMauley The AccelStepper is available in the Arduino IDE Library Manager From: http://www.airspayce.com/mikem/arduino/AccelStepper/ Version Used: v1.64.0
BluetoothSerial By Evandro Copercini Version Used: 2.0.0 Preferences ByHristo Gochkov Version Used: 2.0.0 From: Additional Boards Manager URL: https://dl.espressif.com/dl/package_esp32_index.json
- 2 x Esp32 dev board
- tb6600 stepper driver
- Power: 5V common rail with cnc controller, 5v tap for remote
- 200:3.3v stepdown circuit
- hardware swapping of controller stepper outputs when torch is on.
- Auduino IDE
- FastPID Library
- EasyNextionLibrary
- AccelStepper
- ESP32 Preferences/SerialBt libraries
- Nextion Editor
The User Interface is a Nextion standalone HMI Screen that can adjust most setting and Save tro EEPROM without update Arduino Code. The beauty of use this screen is it handles all the heavy UI events leaving the arduino free to calulate as fast as possible. The Arduino talks with the Nextion Screen via Serial Connection and updates all values. As the user triggers events on the nextion screen the they are reported to the Arduino borad for processing and any calulations needed.
- Input Voltage Sampling
- steps per millimeter
- Delay Time
- Threshold
- Aggressive PID Tuning
- Conservative PID Tuning
- PID calulation for move direct and distance
- Max distances Actuator can adjuest
- Steps and Direction output
- Position and Voltage reporting
- Required: Nextion HMI Screen NX4832T035_011 if you don't have this screen then you will have to rebuild the project for your screen using the Nextion Editor and included project files. if you do this please post your Project and TFT file!
Nextion’s microSD slot is primarily used to upload a TFT project file. Not all microSD cards are made for use with embedded devices especially newer microSD cards made for cameras, etc. Class 10 HC 8GB to 32GB cards have had good success.
Ensure
- microSD card formatted as FAT32 under Windows
- microSD card is less than 32 GB
- only 1 TFT project file exists on the microSD card
- Nextion device is powered off before inserting microSD card
- insert the microSD card containing TFT project file
- power on Nextion with recommended clean power as per Datasheets
- Nextion device is undisturbed while uploading
- after upload “successed” indication power off Nextion
- after Nextion device is powered off then remove microSD card
- power on Nextion with recommended clean power as per Datasheets
- if new version of Nextion Editor, allow time for firmware to update
- wait for uploaded project to begin running on Nextion device
If microSD upload is unsuccessful
- Reformat the microSD card – ensuring FAT32 under Windows, and try.
- use a different microSD card (HC, Class 10, under 32GB), and try.
- compile a blank HMI project and try again.
- microSD card is not the only method to upload project – try via USB to TTL.
This code is designed to run as fast as possible. It uses a while() loop to focus on Calulations and movements when voltage input is over the threshold.
process(){ ... }