New Printer Never Worked: Bed Crash

Snapmaker 2.0 Getting Started
1

Hey folks. I teach writing a literature local community college, and I came in to help them with their 3D printer. I build 3D printers of my own and have been using them for close to 7 years. This snap maker A350 has been sitting here for a year and the computer guy has never been able to get it working so I thought I’d give it a shot. Checked to see if all the cabling is installed correctly and went through and double checked all the components to make sure everything’s correctly installed. When I turned it on it gives me a warning about heat and safety and it goes immediately to a screen that asks to do a bed level calibration. When I hit start calibration the x Gantry moves down and then slams into the bed and then the y moves all the way forward. I can still adjust up and down but it won’t let me actually save the settings.

I have adjusted the bed sensor so that it is a little bit closer to the bed, actually it’s far down as it will go without being lower than the nozzle. The red light comes on so I know it senses the bed, it just seems like the printhead moves in random directions. I’m completely baffled here. Any suggestions would be appreciated.

I’m attaching the link of the printer error so you can see a video of what I’m experiencing.

2

If the assembly and bottom wiring are correct, you should start by reinstalling the latest firmware.
I think the topic below will help you.

Can I skip the initial automatic calibration? - Snapmaker 2.0 - Snapmaker: where creation happens

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3

Thanks. I finally got all the firmware updated on the 3D printer module and the printer itself, but now insteaed of crashing unto the bed, nothing moves at all. I cannot do a bed calibration (get an error) and if I skip it and try manually homing or moving anything, nothing works.

To see if anything moves at ALL I reversed the Z and Y plugs. Doing that lets me move the gantry (all in the wrong directions as it tries to crash into the bed) but at least I get movement. Switching back to the correct wiring renders it immobile once more.

So here is a rundown:

  1. The firmware is updated on the printer and the module.
  2. I can turn on the hotend and the print bed. Both heat up just fine.
  3. I cannot move the bed or the gantry/hotend. Nothing moves at all.
  4. When I use luban to connect to the printer via wifi, I lose the connection within the first 2 seconds. I cannot establish a connection with the printer in order to do anything like check movement or the status of axises.
  5. Before the firmware update everything would move in the wrong direction and crash into the bed, after the firmware update nothing moves at all.
4

What firmware was installed at the beginning?

Your tool head cable is installed on the wrong side of the z linear module, use the holder of the cable to prevent a cable crash.

Connect your machine to a serial connection and let us know what happens if you home the machine by entering G28 in the terminal.

Note, the home position of each linear module is the motor side.
This means:
X (tool head) left
Y (bed) front
Z (lift) up

The behavior is curios, maybe a endstop is stuck.
Before the calibration the machine is supposed to home, this did not happen.

May check the endstop status by entering M119 in the terminal.

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5

In addition, save the log files to USB and see if the linear modules are registered correctly.

Honestly, seeing this weird behaviour, I’d not hesitate to reach out to Snapmaker support. I’d not be surprised if the Controller is damaged.

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I would love to hook up and see what response I get, but when I try to connect the software via wifi it tries to connect for about 5 seconds, then it says “connection lost”. When I try to connect via USB, it finds the printer, but times out when it tries to connect. Apparently tech support originally said it was the screen that was faulty and sent a new one. I’ve tried both screens and there is no difference. I have quadruple checked all the wiring is correct.

Another issue I’ve noticed: sometimes during idle the screen gives me an error and says it has lost connection to the printer. I have to power cycle to get it to connect again. Sometimes when it’s booting, it also shows the Snapmaker logo for a second then goes blank. I have to power cycle it again a few times to get it to turn on. I strongly suspect there’s a serious hardware issue. I don’t know the original firmware version that was on it, because I just found the latest firmware and installed it. I was hoping that would resolve the problem.

7

I saved a copy of the log files and have them on usb. I’m not entirely sure how to read them. All of my self-built printers use Klipper firmware, and snap maker seems to be using Marlin? Either way, what lines would I be looking for in the log files?

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That’s what I’ve in an (older) log from my machine:

1656696597913,2022.07.01 17:29:57.913,INFO,SC-FW,Scanning modules ...
1656696600884,2022.07.01 17:30:00.884,INFO,SC-FW,New Module: 0x2037E0D8
1656696600934,2022.07.01 17:30:00.934,INFO,SC-FW,Got axis Y, endstop: 0
1656696600953,2022.07.01 17:30:00.953,INFO,SC-FW,length: 356 mm, lead: 8 mm
1656696600968,2022.07.01 17:30:00.968,INFO,SC-FW,New Module: 0x2037DFDC
1656696600993,2022.07.01 17:30:00.993,INFO,SC-FW,Got axis X, endstop: 0
1656696601016,2022.07.01 17:30:01.016,INFO,SC-FW,length: 356 mm, lead: 8 mm
1656696601033,2022.07.01 17:30:01.033,INFO,SC-FW,New Module: 0x00802F26
1656696601051,2022.07.01 17:30:01.051,INFO,SC-FW,Got EmergencyStop Module!
1656696601054,2022.07.01 17:30:01.054,INFO,SC-FW,New Module: 0x200080F6
1656696601072,2022.07.01 17:30:01.072,INFO,SC-FW,Got toolhead 3DP!
1656696601127,2022.07.01 17:30:01.127,INFO,SC-FW,probe: 0x1, filament: 0x1
1656696601128,2022.07.01 17:30:01.128,INFO,SC-FW,New Module: 0x00505DDE
1656696601130,2022.07.01 17:30:01.130,INFO,SC-FW,Got Enclosure!
1656696601138,2022.07.01 17:30:01.138,INFO,SC-FW,New Module: 0x2037E768
1656696601168,2022.07.01 17:30:01.168,INFO,SC-FW,Got axis Y, endstop: 0
1656696601183,2022.07.01 17:30:01.183,INFO,SC-FW,length: 356 mm, lead: 8 mm
1656696601198,2022.07.01 17:30:01.198,INFO,SC-FW,New Module: 0x2037EBC2
1656696601262,2022.07.01 17:30:01.262,INFO,SC-FW,Got axis Z, endstop: 0
1656696601285,2022.07.01 17:30:01.285,INFO,SC-FW,length: 356 mm, lead: 8 mm
1656696601302,2022.07.01 17:30:01.302,INFO,SC-FW,New Module: 0x2037F0B6
1656696601362,2022.07.01 17:30:01.362,INFO,SC-FW,Got axis Z, endstop: 0
1656696601383,2022.07.01 17:30:01.383,INFO,SC-FW,length: 356 mm, lead: 8 mm
1656696601399,2022.07.01 17:30:01.399,INFO,SC-FW,Model: A350

I just realized that these lines only show up on firmware updates - but since you did some, I suppose you should find them. I killed lines above that were cryptic to me.

9

I think I was not clear above, try the steps with connected usb cable, this means you should be able without the touchscreen.

Another point, is your touchscreen connector proper seated in the controller?

10

Bonjour étant français je n’ai pas compris tous les commentaires de la vidéo mais il me semble que votre mouvement vertical est beaucoup trop rapide Attention les modules de l’axe Z sont marqués LEAD 08mm et les axes X et Y les modules sont marqués LEAD 20 mm voir notice page 9/24

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11

If it’s not the wrong linear module like @geotrouvetout mentioned (this is a hot tip!), here is a endstop troubleshooting guide:

12

Make sure all LMs are in the correct position and cables are correct. Then start up. If you cannot calibrate call support . If you can get to printer via USB and software run the macros that list components and call support with text dump.

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Make sure to assemble the Platform in correct orientation!

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14

Finally got it running! I had to replace the controller. Thanks for the suggestions everyone.

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