Re: Is there any alternative to Teflon? November 13, 2013 08:30PM |
Admin Registered: 11 years ago Posts: 1,063 |
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leadinglights
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thejollygrimreaper
why exactly the push to get away from ptfe?, aside from the temperature limit,what is wrong with having more than one hotend?
we don't have 1 screw driver for 101 different types of screws do we?
Because something else may be better. We don't know until we try.
Mike
Re: Is there any alternative to Teflon? November 14, 2013 04:42AM |
Registered: 12 years ago Posts: 1,450 |
There is presently no design of hotend that can be interchanged simply and without any adjustment. It would be best to get to the best possible compromise and that means lots of real world trying - and not a little theory.Quote
......, aside from the temperature limit,what is wrong with having more than one hotend?
Re: Is there any alternative to Teflon? December 07, 2013 12:14PM |
Registered: 10 years ago Posts: 7 |
Re: Is there any alternative to Teflon? December 07, 2013 01:08PM |
Registered: 10 years ago Posts: 1,381 |
Re: Is there any alternative to Teflon? December 07, 2013 05:43PM |
Registered: 10 years ago Posts: 7 |
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A2
@dagusi
I like your prototype
Heater vs. Mass:
The picture makes the aluminum block look large.
The aluminum mass might be too big if the heater is small or located too far from the nozzle with a larger mass.
Coat the heater with thermal compound to help conduct the heat.
I would be inclined to use a cartridge heater for this application, and locate it as close as you can to the nozzle.
Idea/hack:
Since this a bench test, and a hack I'll make the following off the wall suggestion.
For an accurate reading of the nozzle temperature, tie the thermistor to the brass nozzle with graphite tow, or fiberglass rope.
Use a Dremel to create a pocket to nest the thermistor in so it's less likely to move, and apply some thermal compound to help transfer the heat to the thermistor.
Then use some high temp automotive silicone as an insulator, and to hold it in place.
I make my own thermal couples, and found it best to locate it as close as physically possible to what it is that you want to monitor/control.
Glass:
What is the I.D. of the glass, it looks large?
If it's too big the molten plastic could push up the tube.
Re: Is there any alternative to Teflon? December 07, 2013 06:21PM |
Registered: 10 years ago Posts: 1,381 |
Re: Is there any alternative to Teflon? December 07, 2013 08:22PM |
Registered: 10 years ago Posts: 7 |
Re: Is there any alternative to Teflon? December 08, 2013 04:20AM |
Registered: 10 years ago Posts: 1,381 |
Re: Is there any alternative to Teflon? December 14, 2013 09:21AM |
Registered: 11 years ago Posts: 173 |
Re: Is there any alternative to Teflon? December 14, 2013 10:14AM |
Registered: 10 years ago Posts: 1,381 |
Re: Is there any alternative to Teflon? December 14, 2013 11:04AM |
Registered: 11 years ago Posts: 173 |
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A2
What do you mean by the forces are not friendly to the glass tubes?
Zirconia is the ultimate material for this application.
Porcelain would be an excellent replacement for expensive zirconia.
Re: Is there any alternative to Teflon? December 14, 2013 01:33PM |
Registered: 10 years ago Posts: 1,381 |