swap end and start of axis

[RFranta]

I am trying to upload T3P3 firmware on duet board. Printer is working fine, but I have just one problem. After pressing home all axis on Pronterface all axis are homed corectly, but when I send M114 it's like X:194 Y:197, Z:195, but I would like to have everithing on 0 after homing, what should I change in firmware? I have now default setting in firmware, changed is just build area.

Thank you

[RRP-support]

Which branch of the firmware are you trying to install? There isn't a 'T3P3' branch. If you mean the firmware here https://github.com/T3P3/RepRapFirmware you need to contact Tony Lock at Think3DPrint3D; I'm not sure what state it's in.

You can control the homing functions in the firmware in this repository. If you look at the gcode homing files in https://github.com/reprappro/RepRapFirmware/tree/master/SD-image/sys you will see that you can make the printer have any homing action you want. The firmware calls these 'macros' when G28 is called.

I hope that helps.

Ian RepRapPro tech support

[T3P3]

Hi RFranta

The Think3dPrint3d multi extruder branch of RepRap Firmware: https://github.com/T3P3/RepRapFirmware/tree/Multi_Extruder_Test Is maintained by me as a test branch for multi extruder support.

As Ian says the homing commands in here: https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/homeall.g https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/homex.g https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/homey.g https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/homez.g

are setup to home a Mendel90 printer which homes to MAX on all three axis but they are easily changed to take these as MIN.

So for example changing the homex.g for minimum would be:

G90
G1 X-2000 F6000 S1 ;approach X MIN quickly
G91
G1 X5 ;back of 5
G90
G1 X-2000 F300 S1 ;approach X <in slowly
G92 X0 ;X axis MIN

Cheers

Tony

[RFranta]

Thank you very much. That's a help a lot. Just my extruder is too fast, I changed fourth item in this array on 90:

define DRIVE_STEPS_PER_UNIT {50, 50, 4000.0, 90, 655.0, 655.0, 655.0, 655.0}

but it doesn't help. What should I change to make speed of extrduding slower please?

[T3P3]

Hi RFranta

So the values you refer to are the firmware defaults, these can also be changed by Gcode as part of the setup configuration.

Check out https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/config.g

You can see the

T0 ; Select extruder 0
M92 E650; Set extruder steps/mm
M906 .E800 ; Motor current (mA)
T1 ; Select extruder 1
M92 E650; Set extruder steps/mm
M906 .E800 ; Motor current (mA)
T2 ; Select extruder 2
......

These lines use The M92 command to set the steps/mm of the selected tool, along with the motor current for that extruder.

Cheers

Tony

[RFranta]

Hi Tony,   thank you very much for answers. Your firmware works really great. Well done! Great work!   RFranta

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Od: Tony notifications@github.com Komu: "reprappro/RepRapFirmware" RepRapFirmware@noreply.github.com Datum: 22.04.2014 22:14 Předmět: Re: [RepRapFirmware] swap end and start of axis (#43)

Hi RFranta So the values you refer to are the firmware defaults, these can also be changed by Gcode as part of the setup configuration. Check out https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/config.g https://github.com/T3P3/RepRapFirmware/blob/Multi_Extruder_Test/SD-image/sys/config.g You can see the T0 ; Select extruder 0M92 E650; Set extruder steps/mmM906 .E800 ; Motor current (mA)T1 ; Select extruder 1M92 E650; Set extruder steps/mmM906 .E800 ; Motor current (mA)T2 ; Select extruder 2......These lines use The M92 command to set the steps/mm of the selected tool, along with the motor current for that extruder. Cheers Tony — Reply to this email directly or view it on GitHub https://github.com/reprappro/RepRapFirmware/issues/43#issuecomment-41089866.