dzach's Hadron build

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Re: dzach's Hadron build

Postby flurin » Tue Jul 03, 2012 6:08 pm

... and here is the first test result:

ooze-j-test.2.JPG

The circle is almost perfect, I 'll do more tests in order to eliminate the lack of plastic at the left.
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Re: dzach's Hadron build

Postby dzach » Wed Jul 04, 2012 6:22 am

Good news, Flurin, the circle looks so smooth, mine is segmented.
With my extruder, the gaps right after the layer change were corrected by playing with the retraction parameters, after I made sure the plastic flow was right by measuring the wall thickness, but your case may be different.

What was the speed setting for that print?
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Re: dzach's Hadron build

Postby flurin » Wed Jul 04, 2012 12:27 pm

Feed Rat = 150 mm/s (Gcode F9000)
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Re: dzach's Hadron build

Postby flurin » Wed Jul 04, 2012 3:14 pm

Here is my best result so far:

ooze-j-test-slice3r083-150.JPG


Because there is a possible bug (Randomize starting points dosen't work) in the Version 0.8.4 of slic3r I used the old Version 0.8.3.

Printing-data: same as above.
Attachments
ooze-j-test.150.2.gcode.zip
Gcode-File:
(7.2 KiB) Downloaded 835 times
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Re: dzach's Hadron build

Postby dzach » Wed Jul 04, 2012 7:41 pm

That's a lot better and up to speed.

I printed your gcode with my Hadron and came out great, the circle printed very smooth too, only the walls came out 0.38mm thick, about 0.12mm thinner than the design.
.
Looking into the gcode I see:

Code: Select all
; single wall width = 0.39mm

which is pretty close to what I measured. What is the wall thickness that you measure?
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Re: dzach's Hadron build

Postby flurin » Wed Jul 04, 2012 10:06 pm

I measured a thickness between 0.4 and 0.45 mm.

I suppose Slic3r can't print 0.5 mm because the nozzle is 0.35 mm and the layer height is 0.25 mm, indeed it prints only one line each layer.
If the thickness of the ooze-j-test would be 0.8 mm or greater than Slic3r would probably print at least two lines.

Otherwise setting the layer height to 0.2 mm results in a wall width of 0.49 mm.

Edit:

I've attached the Gcode-File with layer height=0.2mm > thickness = 0.5mm

ooze-j-test.150.h02.gcode.zip
(8.13 KiB) Downloaded 872 times
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Re: dzach's Hadron build

Postby dzach » Sat Jul 07, 2012 10:38 pm

Frob was right:
2012-07-07-153535.jpg
It was an epoxy encapsulated thermistor not a glass one and wasn't good for the hot end. This is the third thermistor that's gone bad. I bought it as an EPCOS B57561G0104F000.

This is a glass one and hopefully it will last longer:
2012-07-07-151957.jpg

The scale is the same in both photos. The glass encapsulated thermistor is 0.8mm in diameter.
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Re: dzach's Hadron build

Postby dzach » Sat Jul 07, 2012 11:40 pm

Unfortunately, changing the thermistor was fatal for the heater:
2012-07-07-123959.jpg

Time for the real CuHotE:
2012-07-08-022717.jpg
A soon to be copper (Cu) hot end heater.
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Re: dzach's Hadron build

Postby Enraged » Sun Jul 08, 2012 4:53 am

Is that a wire heater? why not use a resistor or a cartridge?
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Re: dzach's Hadron build

Postby dzach » Sun Jul 08, 2012 12:41 pm

Well, I have these reasons for using a nichrome heater:

1. It can be built in any shape, i.e. is not limited by the size of the resistor
2. It can have a very short melt zone, for faster prints
3. It can be very symmetrical and distribute heat evenly to the melt chamber, whereas a resistor/cartridge only heats from one side
4. It can be of any power desired, provided there is an appropriate nichrome wire size.

The destroyed heater had a length of 6mm, and so will the new one.
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