Comments (4)
Please use my official fork, as stated in the README.md. It has predefined profiles for multiple controllers (like the MKS SBASE) and machines, that can be activated by simple defines in config.h. There are also precompiled firmwares for most used boards. See: https://github.com/cprezzi/grbl-LPC
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In the meantime I have found that the fourth axis limit pin is defined on p1.29 (Z max)
define A_LIMIT_BIT 29 // reuse p1.29
I don't really know how to compile these forks (the description is a bit insufficient in the readme) so I will just short the pins and call it a day.
Can i have any future disadvantage by not having a 4th axis physically?
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I have downloaded and flashed the mks_sbase_firmware.bin from releases (94kb file - 2017 oct 8) and have the above mentioned 4th axis defined.
Am I missing something?
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The jumper solution is a easy one (in case of $5=1) and you should not have any disadvantage of it. The 4th axis is anyways mostly used for rotary axis, which often don't have limit switches.
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