Can you implement the kinematics for the scara arms?

[maximeh2]

obsolete, useless?
thanks in advance

[terjeio]

I, or somebody else that has access to a machine (I do not), can.

obsolete, useless?

If there are valid use cases then not.

[maximeh2]

If I'm talking about obsolescence or uselessness, it's because there's no kinetix in this github.

I speak French and I didn't quite understand your message.

thank you

[terjeio]

Since I do not have access to a scara arm machine it is not easy for me to implement the scara kinematcs. So perhaps somebody that has (you?) can do it?

[terjeio]

I found this thread while doing some housekeeping, perhaps the author has something to share?

[maximeh2]

very thanks for your help
many error when compile
exemple
grbl\kinematics\scara.c: In function 'scara_homing_complete':
grbl\kinematics\scara.c:461:29: error: incompatible type for argument 1 of 'on_homing_completed'

[terjeio]

The call signature of on_homing_completed has recently been changed so the code has to be updated accordingly. An example.

[maximeh2]

thanks i passed the errors and now it's compiled and injected in the stm32f411 black pil CE but after problem usb error impossible to connect the stm problem port com

an idea

[terjeio]

Incorrect clock tree setup? The USB peripheral clock must be 48 MHz.

[maximeh2]

I don't know

[terjeio]

I don't know either - when I compile and flash with Eclipse my F411 Blackpill works as it should.
Does it work again if you disable the Scara kinematics? If so then there is a bug in the kinematics code?

[maximeh2]

without kinematic, no problem
same problem with polar or wall plotter

[terjeio]

Then the platformio.ini file might be incorrect? Both works for me:

[FIRMWARE:grblHAL]
[NVS STORAGE:*FLASH]
[FREE MEMORY:94K]
[DRIVER:STM32F411]
[DRIVER VERSION:240418]
[BOARD:BlackPill]
[AUX IO:1,2,0,0]
[PLUGIN:Bootloader Entry v0.02]
[KINEMATICS:Polar v0.02]

[maximeh2]

[env:blackpill_f411ce]
board = blackpill_f411ce
board_build.ldscript = STM32F411CEUX_FLASH.ld
build_flags = ${common.build_flags}

See Inc/my_machine.h for options

-D BOARD_BLACKPILL=
-D USB_SERIAL_CDC=1

Uncomment to enable Spindle PWM output on the SpinDir pin

#-D PROTONEER_SPINDLE_PWM=
lib_deps = ${common.lib_deps}
lib_extra_dirs = ${common.lib_extra_dirs}

Alternatively, place the .pio/build//firmware.bin on the NODE_F4xxRE drive

; change MCU frequency
upload_protocol = dfu

[maximeh2]

another discovery that fried me 2 stm32, I downloaded from web builder the bin for stm32black pil wall plotter, when I connect with my programs I configure the limits to invert them and then I want to test one of the engines and no reaction, is it possible that the bin generated by web builder are unusable?

[terjeio]

The bits from the platformi.ini file above does not tell me anything.

is it possible that the bin generated by web builder are unusable?

It is, due to a regression from moving the call to the init function earlier in the startup sequence - before the settings are loaded. Fixed now.

[maximeh2]

Finaly with webbuilder polar and wall bin ok but a smale question for polar coaster, servo pin in stm32f411 ?

It's a pity that webbuilder doesn't allow you to download a zip of the source files according to the configuration made on the site, because as soon as kinmeatics is activated the system doesn't work when you build it manually.

i hate servos, i'd like to be able to use a stepper to do the same thing as a servo but i don't know how to activate it in grbl hal

[terjeio]

The real pity is that I do not make enough money from this project to hire people that could add useful stuff when I do not have enough time myself?

The spindle PWM output can be used to control a servo when the spindle is configured for it via settings. See footnote 13 for details.

BTW this week I will be busy so do not have much time to spare for support.