[gnea/grbl-Mega Issue#174] Pins don’t align with #define statements About GRBL HAL

Issue #174 | 状态: 已关闭 | 作者: ccwtruck | 创建时间: 2024-03-28

I am attempting to install GRBL-Mega 1.1g (the current release) on an ATmega2560R3, and try as i might, I get no motion on Y & Z axis. According to the cpu_map.h, I have the stepper drivers connected properly:
#define XSTEPBIT 2 // MEGA2560 Digital Pin 24 #define YSTEPBIT 3 // MEGA2560 Digital Pin 25 #define ZSTEPBIT 4 // MEGA2560 Digital Pin 26

// Define step direction output pins. NOTE: All direction pins must be on the same port. #define XDIRECTIONBIT 7 // MEGA2560 Digital Pin 30 #define YDIRECTIONBIT 6 // MEGA2560 Digital Pin 31 #define ZDIRECTIONBIT 5 // MEGA2560 Digital Pin 32
I have flashed with your .hex file several times, and compiled/ uploaded from source several times — still, the Y and Z axis’s show no sign of life.
This is on a CNC plasma table that worked well on the Uno with v1.1h.
I have double, triple & quadruple-checked my wiring — it is correct; after all, i’m just upgrading the system board, and not re-wiring any more than that requires.
Please, can you tell me exactly which physical pins do my stepper controllers need to connect to?
Thank you in advance for any assistance!!!

#1 – fra589 于 2024-03-28

Hi @ccwtruck

Perhaps this doc: https://github.com/fra589/grbl-Mega-5X/wiki/Pinout-mapping-in-cpu_map.h will help you to find which pins are used…

@++;
Gauthier.

#2 – ccwtruck 于 2024-03-28

Thank you for that; I’ve at least verified that my steppers are connected to the right pins. I am now wondering if my Y & Z steppers have taken a dump. They still light up, but with the connections being correct, that’s the next logical link in the chain.

#3 – ccwtruck 于 2024-05-17

After temporarily abandoning my Mega2560R3 project, I picked it back up the other day. I re-flashed the Mega with (first) @chamnit’s latest version (which gave me X & Z motion) and now the version based on regular GRBL 1.1g by Bacon8tor and still only had proper motion on both X & Z axis’s. Y axis was still completely unresponsive, though — even after I switched drivers, flashed GRBL several times, ran the EEPROM Clear sketch….
After much trial & error, suddenly — and I do NOT know what I did — I got Y axis to move, but in only one direction. So, on a whim, I switched back to the original Makerbase driver board & fired it up again. Now, I have all three axis’s moving in the proper directions.
I cannot explain this — perhaps a setting I changed, or a wire I moved — but everything now works.
Now to start working on the torch height controller for the table.

原始Issue: https://github.com/gnea/grbl-Mega/issues/174

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