Just Another GridBot v2 Build

stewart · August 11, 2021, 1:09am

you can use whatever end-stop type you desire or use motor stall if the driver supports it
the E3D (and clone) hot end assembly usually comes with a thermistor
that back motor is for bowden drive. ignore if you’re doing direct drive
Marlin or Klipper? setting up firmware depends a lot on the board and steppers you choose.

Tony_Sexton · August 11, 2021, 7:37am

Thanks Stewart! On the first three questions, everything is clear. But on the fourth. SKR 1.4 Turbo board. I plan to put the screen BIGTREETECH TFT43 v3. So the Klipper firmware won’t work? Probably Marlin. Do you have firmware for SKR 1.4 Turbo?
And can I ask for more details of the printer’s photos, where are the limit switches and the board with the connection of wires?

stewart · August 11, 2021, 1:12pm

I currently use the SKR 1.4 Turbo with one of my newer GridBots and Klipper, but not with a TFT screen. You’d have to ask around on the Klipper discord or discourse forums if they support it. My guess is yes.

Tony_Sexton · August 12, 2021, 8:40am

Good. I apologize for distracting you, but the process goes on, and questions appear, and there is no turning back. I will be using Klipper. I don’t want to invent a bicycle, and besides, this is my first self-assembled printer. I will do it in full analogy with you. What Rasprebby PI do you have? Zero, 3B +, 4B? Is the firmware up-to-date at https://github.com/GridSpace/grid-bot?

stewart · August 12, 2021, 11:05pm

I haven’t added the Klipper configs to the GridBot repo. That’s a good idea. I’m using a mix of 3B+ and 4 on my bots. Everything is unplugged and in the process of being moved to a new space, so I can’t access the printers right now. Should have that resolved in a few days.

Gpagnozzi · August 13, 2021, 5:03am

In the main time, you can grab the clipper printer.cfg from this link. Stewart was kind enoght to share his file with me/us in that tread.

Tony_Sexton · August 13, 2021, 8:41am

OK. Ordered a Raspberry Pi 3 Model B + with a screen. A couple more questions.

about the drivers. I have TMC2209. You connected via UART or SPI. I still don’t understand how to connect the TMC2209 correctly. Whether it is necessary to bend the Diag leg or not.
Stewart, please take a couple of photos of connecting to the SKR 1.4 turbo on the printer itself.

Tony_Sexton · August 13, 2021, 8:43am

Thanks for the link. I watched. There, unfortunately, SKR 1.3 and TMC2208. And as far as I understand, this is a big difference.

JohnR · August 13, 2021, 8:46pm

Tony-- Just finished mine with the same board and drivers. This site has been very helpful: https://github.com/bigtreetech/BIGTREETECH-SKR-V1.3/tree/master/BTT%20SKR%20V1.4
Specifically the pinout diagram for the 1.4 turbo board.

On the TMC2209 drivers, assuming BTT, you will need to clip the DIAG leg if you’re going to use endstops. For sensorless homing you’d leave them in place. I used the optical endstops seen elsewhere. Built some mounts and triggers based on Stewart and Jeff’s discussion on another forum (https://www.thingiverse.com/thing:4931823)

You’ll want to use UART mode, which is setup in the firmware.

I’m using Marlin 2.0.9.1, and just got done with a few days tweaking it for my configuration. Had come from Smoothieware so a little different. Expect a learning curve as you figure out how to edit it! But once you know how, then any changes you make to the printer you can edit and recompile.

Good luck!

Tony_Sexton · August 20, 2021, 10:51am

Stewart, I look forward to hearing from you.

stewart · August 20, 2021, 2:13pm

I’ve been traveling. But will post a pic of 1.4 as soon as I get back in the lab. I’m fairly certain I’m using 2208 drivers, not 2209

stewart · August 20, 2021, 8:30pm

I’m wrong. They’re 2209s. Also, can’t seem to get 1.4s anymore. Only SKR2s now

Tony_Sexton · August 30, 2021, 10:51am

Thanks a lot Stewart. Please send the config. I also have TMC2209 and SKR 1.4 turbo. And if possible, a couple of photos of the wiring on the printer, how it looks as a whole.

stewart · August 30, 2021, 2:06pm

Will do when I’m back in the lab. I only had one v1.4 setup. The rest are v1.3. Neither board is available anymore. I managed to short the 1.4 and replaced with an SKR2. The SKR2 has issues, so I sourced a v1.4 off of eBay. Hoping it’s good and to get it installed soon.

ferschke · September 2, 2021, 10:30pm

As I had mentioned in another thread I’m finishing my GridBot build from a year ago now. Finally.
I’m using an SKR 1.4 Turbo as well and would be interested in the config.

stewart · September 2, 2021, 11:37pm

try this file as a starting point:

https://static.grid.space/tmp/printer.cfg.skrv14

it does not have bltouch configured. do you need that?

ferschke · September 3, 2021, 12:00am

Thank you.
I do have a BlTouch, but not installed yet. I’m sure I can make it work when the time comes.

stewart · September 3, 2021, 12:06am

there are a couple of settings, like in [stepper_z]

endstop_pin: probe:z_virtual_endstop

all in the docs

stewart · September 3, 2021, 12:10am

I haven’t been able to find an SKR v1.4 to replace the one I fried. So I am trying the SKR E3 Turbo now, which is functionally equivalent. So far so good.

Tony_Sexton · September 8, 2021, 3:30am

Thanks for the config Stewart! I hope to finish the printer in a couple of weeks. You have done a great job, I am very impressed. Self-assembly of the printer expands horizons. Now I am dealing with setting up Raspberry. I put the Fluidd system, the Clipper is installed in it. It’s just a novelty for me. https://github.com/cadriel/fluidd/releases