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avizienis / Minimal-Black-Pill--STM32F4xx-BOB-for-grblHAL

Single layer breakout board for the popular Black Pill. Features 4 axes, 5V outputs, optoisolated inputs.
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any feedback on this board after three years of use? #4

Open thirstyone opened 1 day ago

thirstyone commented 1 day ago

it's more of a question. Is it worth replicating? Does it have any drawbacks?
Right now I am using an arduino nano running grbl, without any bob, just wires going to external stepper drivers, and i am setting up RPMs on my spindle manually. I got a bit tired of that mess, so I was looking for some open-source grbl-hal solution (based on some preferably low price boards available through aliexpress). But to my surprise, most of the boards on the market are commercial products, and only few of them have published board layout (so that I could order them from a pcb house). Besides, many of them come with embedded drivers (which I don't need).

What would you say about EMI resistance of your BOB? (It doesn't have any ground polygons, besides, the tracks are thin and close to each other Yet one more thing: since i have a VFD to control my spindle, and it supports rs485, it somewhat makes sense to me to use this interface instead of voltage or PWM control, right? (moreover, as far as I remember, grbl-hal allows to do so).

So, all in all, after three years of usage, is there anything you'd like to change/improve on your board?

avizienis commented 11 hours ago

Hi, the board works fine but it's not as polished as some other offerings, especially since you need features like rs485. If I were to do it all again, I'd just buy a board from one of the community members on Etsy