First catastrophe - wires pulled out
So this happened... huge chunks of PLA Wrapped around the whole block of the hot end. Two wires pulled loose getting it free. Can This be soldered together simply? Or do I have to buy another whole unit? Is there an upgrade to this available if I have to spend the money and time to disassemble and replace it?
RE: First catastrophe - wires pulled out
Solder would melt. You need a new thermistor. (here, from Prusa or another reseller)
RE: First catastrophe - wires pulled out
It's a bit of a hassle to replace, but not so bad. Move the printer to a location where you can easily access everything and go slowly. You're going to have to do a bit of a tear-down unfortunately. Some users have soldered on various modular connectors to avoid the need to unwrap the wires all the way back to the controller.
It is possible the old thermistor may be jammed permanently in place. If so, you're likely to find that a lot of bits in the hotend are fused. Be prepared to replace:
- Heater block
- Thermistor
- Heater cartridge
- Nozzle (unlikely but can happen)
- Heatbreak (if you snap it)
Be sure to read up on the procedure for replacing the nozzle and getting the gap between nozzle hex and heater block.
RE: First catastrophe - wires pulled out
If you buy your thermistor from E3D, it will come with a connector.
My research online indicates it is a Molex Micro-Fit 3.0. If that is correct - these should work:
https://www.amazon.com/gp/product/B078PZY6SM/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1
A good quality IWISS crimper will run you about $20, and is good for most small connectors.
(I have not needed a thermistor yet - but I bought the connectors)
RE: First catastrophe - wires pulled out
Would this fit? I'm still not sure I'm seeing all the wires right... I can't find a close up of all the wires cbonnected to the heat block to compare properly. The wires don't appear to be blue, and that's confusing me right now.
https://www.amazon.com/gp/product/B07TYGYWRG/ref=crt_ewc_title_dp_1?ie=UTF8&psc=1&smid=A1283MCABFXB0
RE: First catastrophe - wires pulled out
I did confirm those were the thermistore wires that broke loose, but I can't get the heat block free so I'm assuming it's fused somehow... so maybe I order this
https://www.amazon.com/gp/product/B07YNHS6F4/ref=ox_sc_act_title_2?smid=A2J4PW8EKV80FA&psc=1
RE: First catastrophe - wires pulled out
also gonna get socks for the block, but are there any other things I should get that might help more consistent prints and quality? I do have a lot of prints that start to peel up slowly on the first layer and eventually come up completely
RE: First catastrophe - wires pulled out
You might go ahead and replace the "Prusafied" heatbreak with an unmodified E3D version. I replaced my parts with a Titanium heatbreak and coated copper heater block. I wasn't having any issues, but thought I'd take advantage of having it all torn down.
Parts peeling is a question of adhesion. Wash your PEI sheet off under the sink with Dawn dish soap or your local equivalent. Scrub it with a plain paper towel and dry it with another. Avoid touching the print area.
RE: First catastrophe - wires pulled out
would a titanium heatbreak make the filament flow more smoothly? I'm hearing there's a "step" in the current heat break. I'm speaking about these with not a lot of full understanding, but I did build this from a kit so I think I get it.