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Anything related to printer controllers not being Duet, RAMPS or Sanguinololu: microprocessors, motor and heater driver circuitry, gEDA/KiCAD issues, soldering tips, etc.
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
Xebbmw, that seems like a good compromise. Have you produced any driver board like that yet? if so, how did it all work?by victor_pv - Controllers
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
I have ESD protection to the endstop pins, ADC pins, and USB pins. Not to the steppers, and other expansion pins, too many pins, and hopefully those cover most pins people would connect/disconnect with the board powered up. Should probably do the same to the Laser/CNC control pins. I think there is a chance someone may plug/unplug a stepper with the board powered up, but should be very rare, whilby victor_pv - Controllers
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
@JustAnotherOne, I think I saw the posts about your board a while back. Seems like a great design, did you ever move forward in any way with it? @O_lampe I think you are right about including the top MCU if it is soldered. All in all, it would cost the same to manufacture, as the lower MCU option in a pluggable board, since the MCU is a bit more expensive, but removes multiple through-hole connecby victor_pv - Controllers
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
@JustAnotherOne those are good ideas. I guess you mean the F446. I am aware of it. It's a good MCU too, but I don't think it adds much over the F407, other than 12Mhz more in top speed, and is more costly, that's why for F4 I have been considering the 407. But there is really nothing preventing me to use that MCU. About the Nucleo boards, I know them, have a couple of them in fact, and a discoveby victor_pv - Controllers
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
@VDX, what features are you currently using in those boards? Depending on what, may already be implemented and tested either on my libmaple HAL or on the STM32Generic HAL.by victor_pv - Controllers
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
O_Lampe, the board in the photo uses a cheap MCU board, that cost some $7-10 with F103 or F407 MCUs. They are available in ebay and aliexpress. I decided to be as modular as possible while developing the board, so I could test different MCUs, replace the MCU if it failed for some reason, or take it off the board and move to the new one when I make a new revision. If I did a kickstarter to massby victor_pv - Controllers
Re: STM32F1/F4 3d Printer board for Marlin - 8 years ago
There is an F4 HAL already running with the older bugfix2.0 branch, from Chriss Barr, based on the STM32Generic core. I tested mine compiles in the F4 with little changes, but I still need to work more of the F4 side, but I have no doubt it will work with little effort. Another github user, Spawn32, has worked a bit further in Chriss Barr's HAL, but porting it to an F7, and I believe he may haveby victor_pv - Controllers
STM32F1/F4 3d Printer board for Marlin - 8 years ago
This is my first post here, but I have read many threads and found great advices and comments, so I am posting here to get opinions. In the last couple of months, I decided to write a HAL for Marlin 2.0 to run in STMF1/F4 boards, using the libmaple based stm32duino core. During that process I started designing my own printer board to fit my needs, and I am wondering if there is any need from othby victor_pv - Controllers