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Hi all!
;currently tested (little by little
because I didn’t have much spare time right now…) and I have found at
least 3 bugs in the current design of the ControlPCB.
These bugs are easy to fix, but I’ll update the electronic design in order to have a bug-free PCB.The bugs I have seen so far are:
- Solder
pads for the Power and Switch terminal blocks are in the incorrect
side. Quick fix: Solder it through the hole or applying some solder
paste in the solder pad before introducing the terminal block. - The
Tool control pin is currently connected to the Mega’s pin 40 which is
not a PWM pin. Quick fix: separate the Tool wire from the ribbon cable
and connect it to a free PWM pin (for example: pin 7). - LEDs are
too bright. I have to check the values of the resistors since the leds
are so bright that them can hurt the eyes. Specially the USB one. Quick
fix: Probably a higher value of the led resistors will solve this minor
bug.
Except for that bugs, the PCB works well.
I will upload soon the fixes, the grbl version for this board aaaaaand a diagram of the PCB connections.
Best regards!
Hi Triumph!
What steppers did you buy? Can you link a datasheet or a link to the shop?
Anyway, if the only diference is that your shafts are a little bit larger I guess you can make the slots larger without problems, I don’t think it will affect the structure.
Hope it helps!
Hi Hotam,
You are right, the current design of Thor only uses 7 steppers, so 7 drivers are enough.
I designed the new board capable to control up to 8 steppers in order to be able to add another degree of freedom. (I was thinking to add rails on the base)Hope it helps!
Awesome! I really like that hammer! 🙂
Be sure to make a picture of your Thor (when assembled) grabing it! hahaha
Nice to know! I’ll be finishing it tomorrow, I guess. And probably I’ll test it too. I hope I designed it well… hahahaha
Hi Jamie,
I have used airsoft pellets for that bearing. Them are made of plastic and have 6mm of diameter. I have not tried with metal balls, but this ones work perfectly and are too cheap.
Hope it helps!
Yay! That board seems cool!
Have you tried it? It works? Hahaha It’s weird for me to ask this questions…but I haven’t finished welding mine yet :/Congrats to Lars! He’s officially the youngest Thor builder!
Hi Adam!
It sounds awesome! There is already a smaller design of Thor but not a larger one! Keep us informed 🙂
Best regards,
ÁngelHi guys, I’m welding the components of the PCB in this right moment and I have seen at least one fail in the board 🙁
The pads of the power pins are in the front side instead of beeing in the back side… That makes difficult to solder the terminal block connector. My solution was to inject solder paste through the PCB hole and heat it with the solder. Other solution could be to place the terminal block in the back side.
I’ll fix the board files asap.
Sorry for the inconveniences,Ángel LM - Solder
