Attached is a picture of a first layer currently being printed. Note the inconsistent extrusion "thickness" (?).
This seems to come in waves somehow. The extruder does not obviously seem to be slipping. I've reduced the motor current just to be sure.
Any idea what might cause this?
Specs:
- ORION, stock extruder, stock hot-end
- 1.75mm ABS
- 220C/90C first layer, 230C/100C the rest
First layer speed was very slow (30% of normal, which is around 50mm/s).
Inconsistent extrusion
Inconsistent extrusion
- Attachments
-
-
cope413
- Printmaster!
- Posts: 446
- Joined: Sun Jun 30, 2013 5:52 pm
- Location: Orange County, CA
- Contact:
Re: Inconsistent extrusion
I've been seeing this a lot more lately... why are you printing the first layer cooler and then bumping it up?
Is that the info in the manual now? Also, 10C is a huge jump in temp. If you can get good first layers at 220, there should be no need to go to 230 unless your speed is significantly increased.
A lower first layer temp (both bed and hotend), IME, doesn't stick as well as a hotter first layer.
Is that the info in the manual now? Also, 10C is a huge jump in temp. If you can get good first layers at 220, there should be no need to go to 230 unless your speed is significantly increased.
A lower first layer temp (both bed and hotend), IME, doesn't stick as well as a hotter first layer.
Fellow Philosophy majors unite!
"The proverbial achilles heel of property monistic epiphenomenalism is the apparent impossibility of ex-nihilo materialization of non-structural and qualitatively new causal powers."
"The proverbial achilles heel of property monistic epiphenomenalism is the apparent impossibility of ex-nihilo materialization of non-structural and qualitatively new causal powers."
Re: Inconsistent extrusion
The "ORIONABS.ini" file provided by SeeMeCNC does the first layer/rest temps:
http://download.seemecnc.com/orion/quickstart/#/23
http://download.seemecnc.com/orion/quickstart/#/23
Re: Inconsistent extrusion
I have seen this before. I don't think it has anything to do with the extrusion being inconsistent, but rather a combination of bed leveling and how the plastic adheres to the platform in those areas. It looks as though your first layer is squished a bit more than it needs to be, starting maybe 0.05 or 0.1 mm higher may net you better results.
- Lochemage
My super cool build stories: Rostock MAX, GUS Simpson
"Give a man a compliment and he'll be all, 'Yeah, I've been working out.' Teach a man to fish for a compliment and he'll be all, 'I feel SO fat.'" - Bob FM
My super cool build stories: Rostock MAX, GUS Simpson
"Give a man a compliment and he'll be all, 'Yeah, I've been working out.' Teach a man to fish for a compliment and he'll be all, 'I feel SO fat.'" - Bob FM
-
cope413
- Printmaster!
- Posts: 446
- Joined: Sun Jun 30, 2013 5:52 pm
- Location: Orange County, CA
- Contact:
Re: Inconsistent extrusion
Rule #1 of 3D printing:
Don't assume anyone else's pre-made settings are the correct ones for you.
Have you measured the filament?
You could very easily see a big change in extrusion width with a 10C change in print temp, have you tried keeping temp at 225 throughout?
Is your bed level?
The areas where it's thin could be because the print area isn't level.
Don't assume anyone else's pre-made settings are the correct ones for you.
Have you measured the filament?
You could very easily see a big change in extrusion width with a 10C change in print temp, have you tried keeping temp at 225 throughout?
Is your bed level?
The areas where it's thin could be because the print area isn't level.
Fellow Philosophy majors unite!
"The proverbial achilles heel of property monistic epiphenomenalism is the apparent impossibility of ex-nihilo materialization of non-structural and qualitatively new causal powers."
"The proverbial achilles heel of property monistic epiphenomenalism is the apparent impossibility of ex-nihilo materialization of non-structural and qualitatively new causal powers."
Re: Inconsistent extrusion
Bed is level as best as I can tell.Lochemage wrote:I have seen this before. I don't think it has anything to do with the extrusion being inconsistent, but rather a combination of bed leveling and how the plastic adheres to the platform in those areas. It looks as though your first layer is squished a bit more than it needs to be, starting maybe 0.05 or 0.1 mm higher may net you better results.
This picture is the best way of showing the problem, but i'm pretty sure it exists at any level height, anywhere on the bed. Note that the transition from "light" to "thick" is matching the pattern exactly. If it was bed level/adhesion, I don't think you'd see a crisp transition like this.