1 Topic by Ggalisky (edited by Ggalisky 2014-11-27 16:58:43)

  • Ggalisky
  • Ggalisky
  • Member
  • Offline
  • From: California
  • Registered: 2014-05-21
  • Posts: 487

Topic: Heat degradtion of plastic from the start up and stop cycle.

Lets say your running natural MG94 ABS on your v1.5 Filastruder. You start it up and extrude a pound, and then stop it. The next day you start it up again and extrude another pound. Would the plastic that was in the barrel at the end of the first extrusion run degrade from being heated up again when you start your second extrusion run?

Ulitmaker 2, a few repraps, Custom Big FFF 3D printer with heated chamber.

My Blog http://ggalisky.weebly.com/
My Youtube https://www.youtube.com/channel/UCXShYo … aDUpebDAOw

2 Reply by elmoret

  • elmoret
  • Filastruder
  • Offline
  • Registered: 2012-10-11
  • Posts: 6,048

Re: Heat degradtion of plastic from the start up and stop cycle.

In theory, very slightly, yes. A Filastruder runs cooler than a hotend though, so it wouldn't be as bad as running it through a printer.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

3 Reply by Ggalisky

  • Ggalisky
  • Ggalisky
  • Member
  • Offline
  • From: California
  • Registered: 2014-05-21
  • Posts: 487

Re: Heat degradtion of plastic from the start up and stop cycle.

So the moral of the story is the extrude as much as you can ABS at once, and at the end of each extrusion run let the Filastruder run until it extrudes everything.

Ulitmaker 2, a few repraps, Custom Big FFF 3D printer with heated chamber.

My Blog http://ggalisky.weebly.com/
My Youtube https://www.youtube.com/channel/UCXShYo … aDUpebDAOw

4 Reply by elmoret

  • elmoret
  • Filastruder
  • Offline
  • Registered: 2012-10-11
  • Posts: 6,048

Re: Heat degradtion of plastic from the start up and stop cycle.

I don't run it to empty, ever - and I've never had layer bonding issues.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

5 Reply by Ggalisky

  • Ggalisky
  • Ggalisky
  • Member
  • Offline
  • From: California
  • Registered: 2014-05-21
  • Posts: 487

Re: Heat degradtion of plastic from the start up and stop cycle.

elmoret wrote:

I don't run it to empty, ever - and I've never had layer bonding issues.

Is there any harm in running it to empty? I do it all the time when switching materials.

Ulitmaker 2, a few repraps, Custom Big FFF 3D printer with heated chamber.

My Blog http://ggalisky.weebly.com/
My Youtube https://www.youtube.com/channel/UCXShYo … aDUpebDAOw

6 Reply by elmoret

  • elmoret
  • Filastruder
  • Offline
  • Registered: 2012-10-11
  • Posts: 6,048

Re: Heat degradtion of plastic from the start up and stop cycle.

No harm, other than the last several feet of material will be less than normal diameter, and possibly inconsistent diameter.

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

7 Reply by Nnnn (edited by Nnnn 2014-12-03 06:39:43)

  • Nnnn
  • Member
  • Offline
  • Registered: 2014-08-04
  • Posts: 13

Re: Heat degradtion of plastic from the start up and stop cycle.

Ggalisky wrote:
elmoret wrote:

I don't run it to empty, ever - and I've never had layer bonding issues.

Is there any harm in running it to empty? I do it all the time when switching materials.

In the plastic extruding industry it is standard practice to completely empty an extruder after the work day has ended.

Having plastic left in the extruder will cause an increase in time required to preheat the extruder the next day. Industry extruders generally preheat for ~2hrs before loading pellets and commencing manufacturing.

Solidoodle 3 that came with new extruder setup with extra fan that hits left side of machine reducing print area even more than originally falsely advertised.

Crappy new driver board that has soldered on driver chips and atmega so if anything fries the whole thing gets trashed instead replacing $5 driver chips or $3 atmega.

8 Reply by elmoret

  • elmoret
  • Filastruder
  • Offline
  • Registered: 2012-10-11
  • Posts: 6,048

Re: Heat degradtion of plastic from the start up and stop cycle.

Nnnn wrote:

Industry extruders generally preheat for ~2hrs before loading pellets and commencing manufacturing.

And people complain about 30 minutes of preheat on a Filastruder!

Filastruder - the robust, inexpensive filament extruder
E3Dv6 All Metal Hotend - the premier 3D printing hotend

9 Reply by insta

  • insta
  • Member
  • Offline
  • Registered: 2014-03-12
  • Posts: 77

Re: Heat degradtion of plastic from the start up and stop cycle.

elmoret wrote:
Nnnn wrote:

Industry extruders generally preheat for ~2hrs before loading pellets and commencing manufacturing.

And people complain about 30 minutes of preheat on a Filastruder!

An industrial extruder will also give you 2kg/minute or whatever after their 2 hour preheat tongue