CTC Dual Hot End - "upgrade"

[noiseboy72]

Hmm, how much thicker?
Mine are about 1mm - or 1 washer thicker. The only important bit is to ensure that the feeder hole lines up with the hot end tube.

Might be worth a little tweak and a play to make them fit, as I think they will solve your issue.

Failing that, I would imagine that the all metal ones will be a better fit, as they are milled out of standard thickness material - as is the heat block. The chances are they will fit properly. Find ones with good reviews.

On another note, check that the thermocouples you bought are insulated. Many are not, with the junction just crimped into the eye. I took mine apart and insulated them with some high temp sleeving. If not, you will find that the heater temps will be all over the place, as the thermocouples will be connected to both the heater blocks!

[BestGear]

Hi

Thanks for the ideas and advice.

I have ordered some metal feeders so will see if they fit and if not, use some spacers to keep it square and feeder holes aligned.

I was wondering if there is benefit to ditching the standard ctc setup and move to new hot ends with the threaded feeder that threads through the (need to be new) mounting bar and up into the feeder drive?

I like that idea as the feeder tube is threaded right up to the drive wheel so the drive should be more direct. So I would be effectivley be building this:

Geeetech_mk82.jpg



I just need to get my head around that parts list as I may try that if the metal feeders dont resolve the issue. I have not measured the thread sizes - some seem to be 6mm and some 7mm... and then the lengths - I guess the shorter the feed to extruder nozzle is better... or perhaps not, for heat reasons?

I have also ordered a (cheapo) temperature probe for a couple of quid to use on my meter to try and get better temp readings.

probe.jpg

My thermistors are in what looks like a crimped eyelet - and do have some (what looks like) fibreglass matting over them to insulate them so should be ok I hope!



Thanks

David