Formbot T-Rex 3

Configs
62

Have you setup the BLtouch correctly?
You also have to use [safe_z_home].

https://www.klipper3d.org/Config_Reference.html?h=pixel#safe_z_home

63

bltouch
bltouch516Ɨ739 70.8 KB

I am not shure

64

fixed it. Was just the dir_pin on z-axis that was reversed

1 Like
65

I have mailed vivedion/formbot and asked for more information regarding the different pinouts on the two maschines. One thing i dont like is that when i set the heatbed to 100c the lamp lights up

Update: fixed the light issue by assigning heatbed pin to led and removing all heatbed info in printer.cfg because I have external source. Now it prints :ok_hand:

66

Thank you very much. With this .cfg as a kickstart I was able to get klipper up and running fast. Some stuff I discovered:

  • The X_OFFSET set for the extruder1 has to be calculated into the G1 movement to park so the right parking position is reached when ā€œT0ā€ is issued

  • I got into situations where the active extruder was extruder1 and a G28 was issued by software which led to BLTouch deploy on extruder but the homing movement was tried with extruder1 which crashes into bed. [homing_overide] may help but this conflicts with [safe_z_home]. Right now I use a START_PRINT macro which makes sure extruder is active before homing and avoid the default homing button in Octoprint.

67

Good morning,
I come back to you, because I have a problem with the LCD screen of the T-Rex. One click to enter the menu, no problem, but when I turn the wheel to move in the menu, nothing happens. However, I havenā€™t touched anything at this level in the printer.cfg. The only modification I made recently was for the change for a BMG BondTech extruder and I had to reverse the direction of rotation of the nema and the pitches.
Attached is my printer.cfg

guy

68

Have you checked the wiring and the connectors?

69

Thank EddyMI3D
Indeed, the black connector on the LCD side was disconnected.
Sorry for the inconvenience, because it is inexcusable not to have seen it

Guy

1 Like
70

No problem whatsoever.

71

printer.cfg (8.4 KB)
Here is a working printer.cfg for the T-Rex 3+, I havenā€™t tried the Filament Runout yet

Thanks @EddyMI3D for the starting hand

1 Like
72

I cannot find any info on the pinouts for this T-REX 3 board I just flashed new board and the hot end fans do not spin. the part cooling fans work ok. I cannot find another forum where any body knows anything about the T-rex. Can you shed any light on this for me? I am setting up as marlin to get it working again before I attempt a move to Klipper.

73

Why donā€™t you start a new thread at General Discussion? This one is older than a year.

Make sure to fill out the starting template!

Good luck, hcet14

74

Actually I searched myself and used the pinouts I found in the marlin firmware.

The hotend (heat brake) fans spin when the hotend is above 50Ā°C

BTW @hcet14 : There are no time limits on Configs threads.

75

Sorry, didnā€™t know that. But my suggestion stands.

1 Like
76

@EddyMI3D Currently mine do not spin when above 50Ā°C. I used the generic current marlin and then brought in the cinfig.h and and adv.h from the sample configs. I guess i will have to go line by line and compare the config files from formbot and see where they differ. I have already compared the pins files and they say the same thing in the fan sections

77

Can you upload your klippy.log?

78

Is this still Up?
First of all, thanks for your documentation. Because of your thread i was able to do IT quiet fast, with raspi Zero 2 and dual zdrive Mod. Easy enough. Printing and Tuning is much better now, smoother Operation No stuttering Lots of Options to enhance moreā€¦

But: from your orig drawings for the Pins of exp connector for the zdriver, it is actually mirrored. If someone still struggles over this, i can give some advice. Also its Not clear which drivers are goong to MISO and which to MOSI, i sortet that Out too. Probably someone Like me will get stuck there tooā€¦ But actually its quite easy.

Until now, i have No Problems with Fans etcā€¦ But only using one Extruder at a time.

Cheers.

79

I still have an eye on this.

Sure?

[tmc2209 stepper_x]
uart_pin: PB3   # MISO 4 Wire
...
[tmc2209 dual_carriage]
uart_pin: PB3   # MISO 4 Wire
...
[tmc2209 stepper_y]
uart_pin: PB2   # M0SI 3 Wire
...
[tmc2209 stepper_z]
uart_pin: PB3   # MISO 4 Wire
...
[tmc2209 extruder]
uart_pin: PB2   #  M0SI 3 Wire
...
[tmc2209 extruder1]
uart_pin: PB2   #  M0SI 3 Wire

Obviously you want to overtake this thread?

There is a difference of pointing out the OP to some ambiguities or saying: I know everything better.

80

I want what? Overtake the thread?

What i described is my ongoing to make the mod, based on your pictures. And i would assume that thats the main info for wiring. ItĀ“s all right beside its mirrored, so actually not right.

I was happy that it worked out, beside the wrong wiring to the pins on exp and not clear picture for miso/mosiā€¦
dont know what you are thinking of meā€¦

May i suggest, that maybe you know everything better? ItĀ“s kinda gross assumption you did over me, is it? And why?

81

This is the line that worried me.
Maybe you should involve the OP in first place.

Itā€™s printed on the board.

Maybe Iā€™ve overreacted - Iā€™m sorry for that.