-=( New nozzle geometry )=-

After i recieved my latest batch of nozzles with a better quality orifice which now has a very tiny chamfer on the inside of the 0.3mm hole it is still compatible with the up! extruders and makerbot extruders, 

on this one i have drilled out the back to 4mm and extended the ptfe liner down into the back of the nozzle, this mean not only does the hotend not have to be sealed but also that retraction is so much more effective, 

after a little more testing i will make these the standard nozzle on the Aluhotend,

the photo below is the nozzle at operating temperature 30mins after the filament was retracted back up 7mm this will essentially make it perfect for dual extrusion setups

-=( Tip of the day #1 - Evil Heater Cartridges )=-

Don't ever take it for granted that the $4 ceramic heater cartridge is electrically isolated from it's stainless steel shell, always buy them in multiples and test them first before using them,

if your thermistor isn't as insulated as it should be or you are using multiple cartridges in a bed like i am for instance you will find it can generate a dead short, and if you run cheap power supplies like i do then you can either damage the board or blow up the power supply,

needless to say all the cartridges i now sell are tested before sale.

-=( V9 JGR Extruder )=-

I have recently been reviewing the way hotends are mounted given the noticable difference in print quality between the plate version and the groovemount version of my hotend i worked out that the groovemount especially in 3mm while it may feel very rigid it inherantly isn't no matter which type of screw you put in there,

I figured that my directdrive extruder had been around long enough that i update it with a few of the changes i had been thinking for for a while and here's what i came up with:

the whole thing is generally more compact , it sits lower to down on the carriage with , there is now a tight groove clamp system in place of the dual screw setup and the hotend also now sits higher up than before so the filament path is shorter than before to the control over the retraction should be better.

The reason it's called V9 is because i have already named other variants of the previous extruder eg v5 v6 v7 v8 so logically this one is V9 it's just i decided to put it up on thingiverse and here

if you want to try it out i have it uploaded on thingiverse , use the thinigverse link on the left