[sudo-discuss] TAZ 3D printer needs a heating resistor

[Jake]

Patrik if we don't glue it in, it won't make thermal contact with the aluminum
block and will burn out.  Thermal paste gets squeezed out when the resistor
heats up and expands and then you end up with a gap and the resistor burns out.

We already went down the road with the Lulzbot resistor that is out of stock,
permanently.  It's also the wrong resistance, and the software patch to
compensate for that fact doesn't work.  I carefully chose this resistor value
(8 ohms) and the thermally conductive epoxy that I want to use to glue it in.

if you want to take over this project go ahead, but sowing doubt and
uncertainty will just leave us with no 3D printer for another three years.

-jake

On Wed, 17 Jan 2018, Patrik D'haeseleer wrote:

> On Wed, Jan 17, 2018 at 4:04 AM, Jake <jake at spaz.org> wrote:
>
>>
>> If someone gets the resistor shaved to fit in there, i'll bring in the
>> special two-part thermal bonding epoxy and glue it in, and then i'll hook up
>> the wires and we'll have a 3D printer again.
>
> Don't glue it in place with epoxy, or you'll have to drill it out when it
> burns out again. It should be a tight enough fit to hold in place by itself,
> no? I would expect regular thermal paste to conducts heat better than the
> epoxy anyway...
>
> Patrik
>
> PS: the replacement resistor that Lulzbot sells is only $3.50, and I would
> expect that one to fit the hole like a glove. They seem to be out of stock
> right now though...