chemputer / cr20-pro-firmware-3dpc

Updated firmware for the CR-20 Pro printer.

CR20-Pro-Firmware-3DPC

Updated Marlin firmware for the CR-20 Pro

Overview

This update brings a few changes to the CR-20 Pro:

1. Updated and improved Z-offset consistency between prints
2. Live-Z adjust the Z offset during prints by clicking the select button 4 times on the printer.
3. Overal reliability improvements (Marlin 2.0)

Operation Changes

The procedure for setting up the Z offset is now different than the traditional CR-20 pro with these new firmware changes. Please follow the following procedure:

Setting the Probe Z Offset

1. Heat the printer up to 200 celcius on the nozzle, 60 on the bed
2. Auto home the printer
3. Move the printer's Z axis to zero. Make sure you have your paper underneath the nozzle before doing this
4. Go to the configuration > probe z offset menu. Move the Z offset into the negative range until it start to grip the paper
5. Save the settings by clicking configuration > store settings.

Live-Adjusting the Probe Z Offset

You can now adjust the offset on the fly! This is really useful for getting just the right first layer 'squish'. There are two ways of doing this:

1. While printing, click the select button four times quickly.
2. While printing, go to configuration or tune, then probe z offset

** SAVE the setting with Store Settings to make the setting stick!

Installation Procedure:

XLoader is a program designed to upload firmwares to your 3d printer. Download XLoader from this source: http://www.hobbytronics.co.uk/arduino-xloader

1. Plug your printer into your computer
2. Open XLoader. Configure it with the following values:
   • Hex File: Please download the "Cr20 Pro 3DPC Update.hex" from this repository
   • Device: MEGA(ATMEGA2560)
   • COM Port: The com port for your printer (should only be 1-2 there - try both if you don't have success at first)
   • Baud Rate: 115200
3. Press Upload.