3020 CNC 3D Printer Conversion Part 2: A-axis Stepper Driver

The next two images you can see the HY stepper controller that I use for the new A-axis that my feeds the filament. This was shoe-horned into my existing controller once I did a little reverse engineering in one of my previous posts. See YooCNC reverse engineering and HY-DIV268N-5A driver. Long story short, there are some extra pins that drive the added motor controller. I will have to design a new enclosure now!

 

I will add some pictures of which pins I am connected to on the YooCNC driver board the next time I have it apart.

TB6600 Stepper Driver - HY-DIV268N-5A

The first place you should go for information on this topic is the CNCzone.com thread on the topic:
TB6600 drive from EBAY
The guys on that forum have put a lot of work in to finding out the problems and issues with the board. I will only share my experiences on this blog. So for a more complete story, see the above link.

 The goal of purchasing this controller was to add an "A" axis to my YooCNC controller for my 3020 based 3D printer. I wanted to make a schematic so I was sure what I was getting into regarding wiring.

 Schematic created by "lonewolf55" on CNCzone.com. Thanks for your work lonewolf55.

 

I've unfortunately done some redundant work since I didn't find the above schematic until a few days ago. Hopefully some will find it useful to have the schematic in Fritzing format. Please download the latest version here:

HY_DIV268N_5A.fzz - (Last Updated May 25th, 2015)

Please let me know if you find any serious errors. It is not a final version, and may be reworked in the near future. Since there are many different versions of this board, some resistor and capacitor values may differ from my Fritzing file.

YooCNC T62-3AX Reverse Engineering

I have been planning to add limit switches and spindle control ever since I got my 3020 CNC a while ago. Many people have done it, and there are a few pages that show the "idea" of how to do it. It all boils down to a few unused pins on the T62-3AX board. This board I believe is exclusive to the 3020 CNCs (and maybe 3040) as the larger ones use separate motor driver boards and a breakout board.

I previously did a limited post on the T62-3AX board on my blog, but I only showed a limited schematic here:
YOOCNC T62-3AX CNC Controller for 3020T

I feel the first step should be a solid and complete reverse engineering of the existing board to make sure we fully utilize its capabilities. This will also serve as a great reference to those needing to make repairs or wanted to further understand its operation. I will be creating a Fritzing file that will have a PCB layout and schematic of the board. I will upload it as I work on it, so there will be versions that are incomplete or missing components. If you find any faults with it or want to help add, please do and send me the changes so I can upload them here.

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General schematic screenshot from Fritzing (download link is below):

 

Please note, some components may be missing or mislabeled.

Current Fritzing file (created in 0.92):
YooCNC_T62_3AX_v04.fzz (Last Updated May 11th, 2015)

What I have learned from drawing up this complete schematic of the CNC driver board:
1) Unused pins, list to come.

2) Unused opto-couplers & header pins, idea for limit switches.

3) Unpopulated positions for DIP switches permit changing of stepper driver presets. Details to come...

4) Generally well designed except for missing A-axis control. My current focus is on adding an A-axis to control the feed stepper for my 3D printer attachment I've purchased.