failed print, hotends encased in plastic

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firesped
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failed print, hotends encased in plastic

Postby firesped » Thu Mar 24, 2016 3:42 pm

I just ran a 7 hour print and didn't check to make sure it was going ok, I went out to pull the print off and found the nothing on the print bed and the hotends are completely encased in plastic. What is the best recommended way to remove this mess? right now I am heating up the hotends.

you probably should create a trouble shooting section on the boards.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

Andy Cohen
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Re: failed print, hotends encased in plastic

Postby Andy Cohen » Thu Mar 24, 2016 4:04 pm

A heat gun comes in handy for this.

firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Thu Mar 24, 2016 4:34 pm

got a big part off, and I have the extruder removed now. trying to remove the plastic with a soldering iron. not fun. one of the cables pulled threw on the machine while I was trying to remove the bulk of the plastic and it cased a board error, seems like my wires on the left extruder may be messed up for the temperature monitor.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Thu Mar 24, 2016 5:07 pm

IMG_0392.JPG
left hotend

IMG_0393.JPG
temperature wire for left came off, was incased in plastic. end that goes into the hotend

IMG_0394.JPG
other end of temperature wire, wire was not attached to the board when I remove it, had broken off.

IMG_0395.JPG
right hotend
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

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rlballard
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Re: failed print, hotends encased in plastic

Postby rlballard » Thu Mar 24, 2016 7:04 pm

The suggestion of a heatgun is a good starting point, however you need to be careful not to melt the electrical connections. If you can carefully heat the part up, use a small wire brush, ( http://www.amazon.com/Wilmar-W1148-3-Pi ... +Brush+Set ) and start lightly scrubbing the covered areas until you can access the set screws holding in the thermocouple (by the looks of the picture, you will need a new thermocouple) and heaters. Remove the components and now a somewhat tricky part, you need a propane torch and a vice to hold everything in. This will quickly heat up the polymer but use caution, don't concentrate the heat for long periods, feather it from a distance like you are slowly spray painting. You will see the polymer begin to bubble a little, scrub the area with the wire brushes, while using the torch, until you reach a clean surface.

When you reassemble the components, if salvageable, don't over tighten the setscrews.

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rlballard
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Re: failed print, hotends encased in plastic

Postby rlballard » Thu Mar 24, 2016 7:33 pm

A very important point in cleaning...

When plastic reach a temperature that exceeds their melting point and move into a phase of thermal degradation they emit some nasty and sometimes toxic vapors depending on the type of polymer e.g. ABS. PLA is mostly a friendly corn based material for commercial use, however most of the filaments are blends of material to achieve the right flow characteristics. So my words of caution are as follows:

Do this in a well ventilated area (garage perhaps with the doors open)
DO NOT stick your face over the part and in the stream of off gassing vapors
I would recommend a fan somewhere close to your work area moving any vapors away from you.
Wear safety glasses (of course!!!)
Scrubbing the part to remove melted plastic will throw hot little pieces that will burn you or anyone else close by (I know it's common sense, but I had to say it)
And an obvious last note:
Remove anything flammable from the immediate work area!

firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Fri Mar 25, 2016 12:17 am

are the thermocouple and the heater standard or are they parts I have to get specific for this machine? I've gotten plastic off but I can't get any part of the hotends apart, the M3 screws on top were overtightened before I even got it as is the nozzle. trying to get the M3 screws out has stripped all my tools. can the machine run with only one unit plugged in? assuming I didn't fry any boards in the process.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

Jetguy
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firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Fri Mar 25, 2016 1:02 am

IMG_0400.JPG

IMG_0401.JPG

IMG_0402.JPG

IMG_0403.JPG


here are some pictures of the current status of the left hotend. when I was heating up the hotend to clean it, the heater slid out. maybe I can heat it up again and get the thermocouple out.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

Jetguy
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Postby Jetguy » Fri Mar 25, 2016 1:17 am

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Jetguy
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Postby Jetguy » Fri Mar 25, 2016 1:22 am

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firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Fri Mar 25, 2016 1:35 am

when it broke, I immediate cut the power on the machine, it was reading a board error, because one of the wires on top broke as well. and I put a external fan on it to cool down the hotend. I've got two V2 hotends on preorder. only the left side had the thermocouple break. I'll test just the thermocouple before I connect the heater on the right side as well, to make sure it will work.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

Jetguy
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Postby Jetguy » Fri Mar 25, 2016 1:42 am

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Jetguy
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Re: failed print, hotends encased in plastic

Postby Jetguy » Fri Mar 25, 2016 1:56 am

This kind of kicks over a second point, I really need to verify (when I get back from travel) the stock firmware has "heater decoupled" enabled in the firmware. If not, expect me to post an emergency safety update by Sunday the 27th if not sooner.

firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Fri Mar 25, 2016 2:08 am

I'm already kinda expecting for my printer to be down until the V2 is out. when I got the heat gun today, I also picked up welding gloves and welding pilers. I'm also thinking I need to just get new thermocouple and heaters for the V2, if it doesn't already come with them.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2

Jetguy
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Postby Jetguy » Fri Mar 25, 2016 2:14 am

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Jetguy
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Re: failed print, hotends encased in plastic

Postby Jetguy » Fri Mar 25, 2016 2:15 am

V2 does not come with new heaters and thermocouples.

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rlballard
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Re: failed print, hotends encased in plastic

Postby rlballard » Fri Mar 25, 2016 2:50 am

Great followup Jetguy...

firesped
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Re: failed print, hotends encased in plastic

Postby firesped » Fri Mar 25, 2016 3:06 am

glad something productive is coming out of this.
RL name: Michael Nolen
printers:
raise3D N2 kickstarter Early Bird
Trinus Deluxe (running smoothieware on Azteeg X5 GT board)
Monoprice Maker Select v2


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