Saturday, 19 November 2011

Mounting my Hot End

It's come to my attention that a few people have tried to use a Groove mount for my hot ends.

The White PTFE is not structural !

You MUST use the brown PEEK Block to mount and support my Hot End.
I have included a few mounting examples:

Using Wades geared extruder

This is the Wade Extruder from 
Using Adrians extruder
And the mounting on my huxley.

Wednesday, 27 July 2011

Hybrid Huxley is coming along

I got Motors today. Zapp supplied them as they were in stock.

Note the very tidy work bench :)
 The Patented Belt clamps on the X axis
 You may be able to spot a few odd design issues.....

Sunday, 24 July 2011

Thermistor table for my thermistors.

Several people have asked me for this so here goes.

// /usr/local/bin/ --r0=100000 --t0=25 --r1=0 --r2=4700 --beta=4267 --max-adc=1023
// r0: 100000
// t0: 25
// r1: 0
// r2: 4700
// beta: 4267
// max adc: 1023
#define NUMTEMPS 20
short temptable[NUMTEMPS][2] = {
   {1, 713},
   {54, 236},
   {107, 195},
   {160, 172},
   {213, 157},
   {266, 144},
   {319, 134},
   {372, 125},
   {425, 117},
   {478, 110},
   {531, 103},
   {584, 96},
   {637, 89},
   {690, 83},
   {743, 75},
   {796, 68},
   {849, 59},
   {902, 48},
   {955, 34},
   {1008, 3}

Wednesday, 20 July 2011

My Hot-End design and other details.

It's about time I updated and wrote about this.

In the past I write about various Hot-End failures, so I designed my own hot end which still works and I still use from time to time.
That Hot end works well but is VERY Dribbly, resulting in rather untidy prints.

I put together an updated standard Reprap hot-end :
This also failed. The PTFE split where it screws into the Brass Nozzle.

Several design ideas later I found a combination that prints cleanly and is strong enough.

The Nozzle is unchanged from the standard reprap design.

The PTFE has a shoulder turned onto it at 10.5mm dia X 4 mm long.

The PEEK is drilled to 8mm then 10.5mm approx 6mm deep.

The PTFE sits inside the PEEK block supporting it.

 The Heater I make 8 mm thick, rather than 10mm. It's Pictured here with resistor and Thermistor installed.

This has proven a strong and resillient Hot-End.
I have made and sold a good few of these with no complaints.
You will find these hot ends on sale at