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For those interested, I just finished posting all the files needed to print the entire cable chain and control panel assembly of The Beast on Thingiverse.

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Safety advisory for anyone still using the stock Rigidbot thermistor.

I have 2 Rigidbot printers and have enjoyed several years of relatively trouble free printing. That being said, this is the 2nd time this has happened on one of my printers.

After trying to trouble shoot some extrusion issues, I noticed that once again, the thermal cement holding the thermistor bulb into the threaded portion had failed. I had the exact same thing happen on my other printer several months back. Both times the thermistor didn't fall out of the threaded portion (luckily) but was loose in the socket and making light contact, causing inconsistent temperature readings. I've been using a compatible aftermarket thermistor in my other Rigidbot and have not yet had a similar failure. They may be using a better epoxy compound, or maybe I've just gotten lucky. I put this out there as a warning to anyone using any kind of threaded thermistor. I assume if the expansion rates are not exactly the same for the cement and metal portion, that any thermistor glued into a threaded insert will eventually separate after enough thermal cycles. A mechanical crimp of some sort or peaning over the edge before the cement hardens would be a nice extra layer of safety to prevent it from just pulling free. I highly advise checking the thermistor from time to time to make sure it is still secure and not just assuming it is ok because it is threaded in there.
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RBB3 X axis running backwards
I just assembled my RBB3, everything seems fine, except that the x axis homes to the right. I have sort of got around this by mounting the x motor with the shaft down, however this does not seem great.
I guess that I can swap the wires on the stepper, but really was looking to assemble and play.
Any suggestions of something dumb that I might have done?
I can correct this in firmwear, but really don't want to get into that now.

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Built an enclosure for my Rigidbot (Part 1)
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Printed this last night and looking for some expertise analyzing the issues. There seems to he some stringing on the larger spans and a section that didn't completely attach/print. Is this due to bridging or something else? Any recommended tweaks?

Printed in white 1.75mm PLA
.3mm layer height, 60mm/s speed, .8mm shell
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Finally got a short moment to take over the kitchen table and solder the newest board together. If I were more OCD I would straighten out the JSTs better... But alas 😔...

Has anyone figured out a decent design for an enclosures? I gave it a try on a back of napkin to the point I was almost ready to order the Lexan from TAP cut and drilled, but ultimately I didn't like the base.

I don't trust running 220 in some fabric opaque cover as I have seen some pictures.

Just a friendly PSA.... Make sure when you buy nozzles, they send the correct diameter. I know this is common sense but I've been troubleshooting everything since switching to a 0.5mm nozzle. Turns out it was really a 0.4mm nozzle and changing the nozzle size in my software fixed everything after calibrating the extruder and pid tuning the machine. Man what a difference. Looks like a $1200 printer again....

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WOW.... Big surprise !!!!
Few minutes ago, I was looking for a screw, and I found a in factotum box, full of spare parts, screws, bolts, residual from the original RigidBot box and other materials, a plastic bag with something shining, almost completely covered by bolts in the container.

I could not tell you the surprise, when I got it, and extract from inside what seemed a small aluminium brick. It was......

... an incredible Release II original Hot end from RigidBot, that they ship with the printer, and I did not noticed during the build work several years ago.
Probably I picked up the first I catch from the bag, assuming they were the same thing, and then I completely forget the existence.

But they aren't the same thing. This has the correct distances, different size and shape, and no leak !!!

WOW !!!! This news compensate the bad news of this morning about the just broken thermistor.

Now I will repair the thermistor (I have other two without bolt) and I will install this new brick, and I am curios to see what happen.
You can see the new aluminium brick in the photos.

- Did you also receive it with the RigidBot ?

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Today after another dismount/remount of the extruder, when I turned on the RigidBot I got "MINTEMP Error" on the display. Of course the thermistor was well connected.

I dismounted again the extruder, and checked the resistance of the thermistor that should be in the range of 200K. NOTHING. It is like the two contacts are cut. I moved & press around the two wires, with no result. No contact. Probably since the small copper cables inside are very thin, one has been broken during the several movements of the mount/dismount phases.
This was planned. When I started the operations, noticed the rigid cables structure of the thermistor, and I was sure it would have been broken at 90%.

And then last but not least, YES, all of you had reason.
When I removed the thermistor bolt, I have seen a lot of PLA filling the cavity, and this means that the aluminium block as a leak, small, but it has.

Of course I have not dropped my RigiBot on the floor :) :)

Two solutions now.

- I cut, drill, and build a new aluminium block. The I drill and empty the metal thermistor bolt, removing the old one, and put a new one with some glue.
- Buy the whole upgrade at Reliabuild for 90$ (yes, it is expansive, but I am in Europe with added VAT Duty Taxes and shipping).

I should think. Mmmmmmm :(
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