Heater for filament extruder.

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I used a Parkside soldering iron, which I bought for 12 Euros at Lidl, with an adjustable temperature of 48 Watts. The second is a Lotring soldering iron, which costs 5 Euros and produces 30 Watts. It takes the first 15 minutes to heat up. I'm using a tube that's 320 mm long, with a diameter of 21.5/16.2 mm. I've also got a Hopper Thing 152380. For assembly, I'll use a copper wire and a hose clamp. Then I'll isolate it. Here are the temperature test results: time | 48w | 30w | temp on top drill & temp at hopper ------|------|------|------------------------- 0 | 0 | 0 | 20.6 | 20.1 5 | x5 | x | 43.0 | 21.4 10 | x5 | x | 130.5 | 22.7 15 | x5 | x | 195.3 | 30.5 20 | x5 | 0 | 204 | 45.3 25 | x5 | 0 | 208 | 51.2 30 | x5 | 0 | 213 | 50.7 35 | x4 | 0 | 192.5 | 59.5 40 | x4 | 0 | 192.5 | 59.5 45 | x4.5 | 0 | 191.8 | 60 50 | x5 | 0 | 198.7 | 60.2 55 | x5 | 0 | 208 | 60.3 60 | x5 | 0 | 215 | 60.2 120 | x4.7 | 0 | 201 | 61.7 If I adjust the soldering iron to 4.7, the temperature will stay at 200 degree Celsius. Next step is testing with granulate. Is there a cheap granulate address somewhere in the Netherlands? Thanks! See also this thing: http://www.thingiverse.com/thing:250594 Tunnelplan.nl