How do I complete this hot end build?

Hi,
I'm building a Prusa Mendel , with Wades' geared extruder. I bought a harware kit from the reprapkitstore, including:

"RepRap Hot End Kit

Contains

Brass nozzle 0.5mm for 3mm filament.
PTFE insulator
PEEK support block
Brass Heater block"

(I've also separately purchased a thermistor and a supply of 3mm filament)

I'm not quite sure what I have to do to complete this part of the build.

here's a pic:




the bit touched by the screwdriver is loose in that it can slide up & down - so obviously not right at present

I've looked around on the web but not found some clear steps/instructions.

So... what do I need to do to finish this part of the build?


Thanks in advance.

Mike

Hello,

You need 2 3mm threaded support rods to hold the PEEK block up tight against the nozzle. The support rods need to go up through the extruder. The idea is that the PEEK block is pulled tight against the nozzle and relieves the PTFE of any stress.

Regards,

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Brian Reifsnyder
[www.hotends.com]

This should answer all your Q's

[reprap.org]

D

Two good replies in 12 minutes - that's great guys, thanks again.
Mike

That nozzle is designed for Adrian's extruder, not Wade's. You will need an adapter plate under the extruder for the bolts.

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[www.hydraraptor.blogspot.com]

Nophead:

>You will need an adapter plate under the extruder for the bolts.
Yes I've had some fun figuring out what to do! I'll probably cut an adaptor out of some ali.

Meanwhile can I ask: is it ok to use heat sink compound to help hold the power resisitor (and maybe the thermistor)
in the barrel?

Edit:
oops.. asked a question before doing a search first! Looks like the answer is yes:
Q re thermistor mounting

Edited 1 time(s). Last edit at 12/09/2011 01:34PM by 3D2B.

I use heat resistant silicone on mine as thermal paste doesn't go hard, some people use fire cement I think too

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__________________________________________________________________________
Experimenting in 3D in New Zealand

Nophead:

>You will need an adapter plate under the extruder for the bolts.
Thanks again for the info. I found a couple of ali parts in the workshop that looked like they could work.

To all, if anyones interested, here's a pic of my hack using those:



The tip of the screwdriver points to a recess for a M4 nut. Theres another opposite side of the ptfe barrel.

I haven't used those recesses and cant see their purpose - what are they for?

Mike

Edited 1 time(s). Last edit at 12/11/2011 03:23AM by 3D2B.

Nice solution!

The m4 holes you are pointing at are for mounting the extruder cold end to the carriage.

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--
-Nudel
Blog with RepRap Comic

You can mount the extruder inline or at right angles to the x axis. One gives more Z movement and the other more X movement.

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[www.hydraraptor.blogspot.com]