NEW BPS 3D Printer Extruder 30+hrs on a single print https://www.youtube.com/watch?v=r8QAMmDFSks https://reprap.org/forum/read.php?94,381486,381486#msg-381486 Sat, 18 Apr 2026 19:31:35 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?94,381486,684984#msg-684984 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,684984#msg-684984
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Traumflug
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A2
Any way to attach thermistor and heater besides tape?

Tape? What an awful kludge.

Thermistors should be glued in. With J-B Weld, high temperature silicone or, if 300 °C isn't sufficient, with ceramics like exhaust putty or fire cement. That's what professionals do, too. They just glue into a bolt to allow replacing the thermistor by replacing the bolt.

TESTIFY!
...and it snaps to pieces of you look at it sideways.

I'm giving JBW Marine Weld its day in court, for both the thermistor and the heat plugs.]]> Ac For Sale Thu, 07 Jul 2016 21:27:21 -0400 https://reprap.org/forum/read.php?94,381486,622426#msg-622426 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,622426#msg-622426

Housing looks nicely machined, are you still selling these?
]]> MechaBits For Sale Sat, 06 Feb 2016 13:40:44 -0500 https://reprap.org/forum/read.php?94,381486,383522#msg-383522 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,383522#msg-383522 Ebay link for M3 Stud thermistor

Our thermistor is currently installed on Witbox 3D printers and new Prusa i3 versions (products of bq company in Spain). History of thermistor reliability is about 1.5 years.
Max working temperature for prolonged periods is 250C.]]> rp1 For Sale Tue, 15 Jul 2014 17:35:52 -0400 https://reprap.org/forum/read.php?94,381486,382275#msg-382275 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,382275#msg-382275 billsprototypestudio For Sale Sun, 13 Jul 2014 07:49:41 -0400 https://reprap.org/forum/read.php?94,381486,381848#msg-381848 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381848#msg-381848 I didn't suggest tape :D

I do agree with you that it should in addition being mechanically retained, incorporate a high temp bonding agent, maybe with muffler repair cement (Water Glass: Sodium Silicate), high temperature silicone, or a high temperature epoxy.

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billsprototypestudio
If you are worry about it, you can use some kapton tape to affix it.


Here are all my links pertaining to screw-on thermistors:

Screw-on Thermistor M3 Stud, seller rp_one_labs [www.ebay.com]
Amico 0-500C Fork Terminal 6mm Screw Threaded Thermocouple K Type 1 Meters, seller uxcell [www.amazon.com]
2 pcs Thermistor in #6 Lug, 10K @ 25 C, J Curve, NTC, seller memotronics_llc. [www.ebay.com]]]> A2 For Sale Sat, 12 Jul 2014 08:04:54 -0400 https://reprap.org/forum/read.php?94,381486,381797#msg-381797 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381797#msg-381797
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A2
Any way to attach thermistor and heater besides tape?

Tape? What an awful kludge.

Thermistors should be glued in. With J-B Weld, high temperature silicone or, if 300 °C isn't sufficient, with ceramics like exhaust putty or fire cement. That's what professionals do, too. They just glue into a bolt to allow replacing the thermistor by replacing the bolt.]]> Traumflug For Sale Sat, 12 Jul 2014 06:43:33 -0400 https://reprap.org/forum/read.php?94,381486,381711#msg-381711 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381711#msg-381711
Tugging on the termistor leads to verify that the paper clip hack is intact is not advised, as the fine wire of the thermistor could fail. If there is a gap between the tag end of the wire and heater block the wire could work it's way out. Replacing the thermistor will be difficult.

Among many considerations, I prefer a solution that is mechanically simple to employ, uses quality, and appropriate materials, and is easy to test.

You have room between the two thermistor holes and the heater cartridge-well for a tapped hole, and you are already setup on that plane to machine holes. Could you fabricate from sheet metal a retaining plate/shield/cover, with a hole in it to pass the thermistor leads, and retain it with a bolt? It would cover the thermistor well completely, it is easily removed, and can be readily tested that it's screwed down tight.

Most hot end mfg don't have a robust solution to retain the thermistor. I think your taking steps in the right direction. I really don't want to see any one harmed, and I'm sure you don't either.

An engineered solution would entail a validation of the materials, and method of retention, longevity test, failure mode analysis, redundancy, a maintenance, and replacement protocol, etc., etc. I am not giving you advice or expert opinion.

Tks.]]> A2 For Sale Sat, 12 Jul 2014 01:22:37 -0400 https://reprap.org/forum/read.php?94,381486,381688#msg-381688 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381688#msg-381688 Hope you are happy with this solution.
Cheers, Bill]]> billsprototypestudio For Sale Fri, 11 Jul 2014 23:31:59 -0400 https://reprap.org/forum/read.php?94,381486,381675#msg-381675 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381675#msg-381675 Eventually Kapton tape will soften, and adhesion will be lost due to the heat, then the thermistor is free to fall out, either a melt down, or fire will ensue.

Any way to attach thermistor and heater besides tape?
[forums.reprap.org]



Fire Hazard
[forums.reprap.org]
]]> A2 For Sale Fri, 11 Jul 2014 21:57:17 -0400 https://reprap.org/forum/read.php?94,381486,381668#msg-381668 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381668#msg-381668 If you are worry about it, you can use some kapton tape to affix it.
Cheers, Bill]]> billsprototypestudio For Sale Fri, 11 Jul 2014 21:01:23 -0400 https://reprap.org/forum/read.php?94,381486,381666#msg-381666 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381666#msg-381666 www.ebay.com.au]
or from my facebook page [www.facebook.com]
I only have 16 of them on the first batch.
Cheers, Bill]]> billsprototypestudio For Sale Fri, 11 Jul 2014 20:44:50 -0400 https://reprap.org/forum/read.php?94,381486,381622#msg-381622 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381622#msg-381622 A2 For Sale Fri, 11 Jul 2014 17:22:04 -0400 https://reprap.org/forum/read.php?94,381486,381558#msg-381558 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381558#msg-381558 MrDoctorDIV For Sale Fri, 11 Jul 2014 14:31:52 -0400 https://reprap.org/forum/read.php?94,381486,381557#msg-381557 Re: NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381557#msg-381557 MrDoctorDIV For Sale Fri, 11 Jul 2014 14:28:31 -0400 https://reprap.org/forum/read.php?94,381486,381486#msg-381486 NEW BPS 3D Printer Extruder https://reprap.org/forum/read.php?94,381486,381486#msg-381486 https://www.youtube.com/watch?v=r8QAMmDFSks]]> billsprototypestudio For Sale Fri, 11 Jul 2014 10:37:24 -0400