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I used a round coffee table I found locally. It was easier to start with that, building something round is somewhat difficult. I think I paid 35.00 usd for the table. I then used some 1/8” plywood for the drawing surface with the underside painted with gloss paint to provide a smooth surface for the magnet.
It should be powered from the pcb. Check the pin labeled USB. It should be 5v. If it is, check your grounds as well. If it still doesn’t power up pull the stepper drivers and test. I had some issues with the TMC2209 drivers I used and it would not power up with them installed.
Try using SandTableScaraMatt. The pi hat is for a Raspberry pi.
I would suggest using 25volt for the caps or even 35volt. Normally you double the supply voltage to give you some headroom on the caps. Also look at some of the pictures on Matt’s post. It may give you some clues on components needed.
Open a new web page similar to this but with the IP address of your table. http://220.127.116.11/cnc.html
Open this link to easyeda. Select open in editor. Once open, select, fabrication from the top menu, then BOM. This will generate a list of the parts needed.
Hope this helps.
What does your config file look like? Did you set the PIN numbers correctly for each stepper? If using a 4988 Matt’s board should work without changing anything. I was able to get TMC drivers working with a change to the board described in another thread. I would stick to the 4988 drivers until you get it working.
Try using the 4988 drivers you have. If they work one of your tmc2208 is bad. Also, make sure you have the enable pin set correctly for both drivers in the software.
See this post. You are having the same issue I had.
Correction to me using tmc2800. I’m using tmc2208 stepper drivers.
What stepper drivers are you using? I used tmc2800 and had the same problem. What worked for me was moving the enable pin to gpio 33. If you are using the board Matt designed you will need to cut the trace from gpio 12 and then solder a small wire from gpio 33 to the enable pin trace on the board. This worked for me using the tmc2800 steppers. If you are using a different stepper driver I’m not sure.