I have skimmed through the RAMPS-FD thread now, very inspiring. I hope no one is offended if I blatantly steal from the design?
If I got it right the problem was the common node of the bed heater FET lifted and current started to flow through the USB cable? Did the layout change fix it?
My biggest concern is getting the pinning of the MCU right. I can´t really get it with the pin assignment muxing. Anyone know if there is a simple way of sorting out the configuration?
I have spent way to much time browsing for stepper drivers but keep coming back to A4988. I believe there is a reason they are popular. A while back I looked at DRV8825 but I must be remembering wrong or have they gone up in price lately? Would you recommend any other driver than A4988?
I was set on making the board 12V only to keep size/cost down but is still tempting to make it 24V tolerant. I have only a few hours of experience with 19V so I have no clue if I would regret designing for max 12V, advice highly appreciated. Less current with 24V just feel more and more like a good idea when I´m thinking about it.
I have a layout of the dev board as good as finished as it is not that much to it. Do you think it is worthwhile make a run with it or make a full design right away? Ambrop?
If I got it right the problem was the common node of the bed heater FET lifted and current started to flow through the USB cable? Did the layout change fix it?
My biggest concern is getting the pinning of the MCU right. I can´t really get it with the pin assignment muxing. Anyone know if there is a simple way of sorting out the configuration?
I have spent way to much time browsing for stepper drivers but keep coming back to A4988. I believe there is a reason they are popular. A while back I looked at DRV8825 but I must be remembering wrong or have they gone up in price lately? Would you recommend any other driver than A4988?
I was set on making the board 12V only to keep size/cost down but is still tempting to make it 24V tolerant. I have only a few hours of experience with 19V so I have no clue if I would regret designing for max 12V, advice highly appreciated. Less current with 24V just feel more and more like a good idea when I´m thinking about it.
I have a layout of the dev board as good as finished as it is not that much to it. Do you think it is worthwhile make a run with it or make a full design right away? Ambrop?
