Where can I get bed harness cables for Mini V1?

[btmura]

Hello fellow Lulzbots,

On my Lulzbot Mini v1, I started to get the “MINTEMP triggered, system stopped! Heater_ID: bed - Printer halted. kill() called!” error and figured that I need to replace the Bed Harness cables:

Bed Harness Cables, Mini 1.00 - 1.03

I can’t seem to find this part anywhere. Anybody have any ideas?

Thank you,
-Brian

[defuzz]

You can always make them yourself!

See step 2 at https://ohai.lulzbot.com/project/mini-104-cables/mini-v104/.

[btmura]

Thanks defuzz!

I was only looking in the v103 section, so I never saw this! I assume these cable instructions would work for v103 too.

Initially, I tried printing today and got a probing failure. Then I took off the RAMBO cover and noticed the extruder mosfet output plug could be pushed in a tad. After this, it is printing about 44 minutes without issues and still going as I type. The temp of the bed does seem to drop sharply about 20 degrees and come back to 60 degrees. It happened twice after about 5 minutes into the print, and I just saw it again at 45 minutes into the print. I wonder if these dips point to a bad bed or bad thermistor wire? Or is it no problem at all?

[btmura]

Here is a picture of the drops:

[defuzz]

1.04 may have changed some things. Here’s the source for the 1.03 bed harness:

http://download.lulzbot.com/retail_parts/Completed_Parts/Mini_Y_Axis_Cables_1.00-1.03/bed_harness_v1.1.odg

• assembly instructions on page 2

http://download.lulzbot.com/retail_parts/Completed_Parts/Mini_Y_Axis_Cables_1.00-1.03/

• also has a doc with the parts to order

I don’t think the bed could drop in temperature that quickly, so it’s probably an issue with the sensing.

[Iggy]

The bed harness between the 1.03 and 1.04 are very different.

You can see here in my project Mini, how I updated mine.

My Project Mini [Fixing -> Restoring -> Farm]

Update 3 I installed the new belt clamps, at the most extreme ends of the axis there was some rubbing on the belts and these seem to have fixed that. [image] While I was taking things apart, I adjusted the Z axis and I printed another Mario. It seems like Z hope problem I had was taken care of. I also noticed the bushings were pretty worn out on the X axis and needed to be replaced, same goes for the Y but those were in better shape. Since the ones that come stock are pretty expensive, I dec…

Change it to the 1.04 if you can.

[btmura]

Thanks defuzz! I was going to ask what materials to use, and I think these links have all the answers!

[btmura]

Thanks Iggy. Wow! What a great thread you made. I need to print out a new front idler too. It has a visible crack around the bolt…still seems to work though.

[btmura]

Today, I took apart the printer to take a look at the bed harness cables.As I was disconnecting the yellow thermistor connector cable, it fell apart in my fingers. One of the yellow cables going into the black molex connector fell out. It looks like I need to strip the wire and crimp it? However, that would make one of the two wires shorter…do you think it would still work? I would hate to buy a big spool of this wire and like a pack of those molex connectors and just use a little of it… Any ideas?

[defuzz]

It might still work. Mine has quite a bit of slack. You can probably get wire and crimp pins for under $10 on eBay.

[reddoster]

Hey there. I’m having the same problem and have found the harness here: Lulzbot Bed Harness Cables, Mini 1.00 - 1.03 - elite3dprinters

Adding this link to this thread in case others are also still searching. At this point, I’m looking to upgrade to something with a larger print volume, but want to keep using my Mini in the meantime…