Problems with ABS printing  

Re: Problems with ABS printing

Use bed level correction on the left side to lower the nozzle there or print with a brim.

Alternatively, put the printer in an enclosure or increase the bed temps.

Peter

Re: Problems with ABS printing

Use bed level correction on the left side to lower the nozzle there or print with a brim.
Nozzle is perfectly adjusted, when the parts are done the underside is perfectly smooth.

Alternatively, put the printer in an enclosure
Enclosure is being developed, but still some time to go.

increase the bed temps.
Even though i will surpass everything recommended?

Re: Problems with ABS printing

Try lower nozzle temperature and higher bed temperature, something like 230/110.

Re: Problems with ABS printing

Print with something else than ABS? 😀

Sorry, not the solution to your problem, you've got some good tip here already, try those! But also look into other plastics, there are a lot of really good plastics with similar characteristics as abs, but without the warping and toxic fumes.

Re: Problems with ABS printing

Print with something else than ABS? 😀

Sorry, not the solution to your problem, you've got some good tip here already, try those! But also look into other plastics, there are a lot of really good plastics with similar characteristics as abs, but without the warping and toxic fumes.
Yeah i know there's a lot of other options, but now i have some ABS and i want it used!

Re: Problems with ABS printing

Print with something else than ABS? 😀

Sorry, not the solution to your problem, you've got some good tip here already, try those! But also look into other plastics, there are a lot of really good plastics with similar characteristics as abs, but without the warping and toxic fumes.
Yeah i know there's a lot of other options, but now i have some ABS and i want it used!

Then you just need to let it cool as slow as possible, and make sure you have really good adhesion (abs glue or similar).
No fan, hot bed, enclose the printer if possible.

Best Regards Patrik

Re: Problems with ABS printing

I use a lot of brim and keep the PEI bed particularly clean with isopropyl alcohol.

EDIT: Can you share the model? I would like to see how I fare.

Re: Problems with ABS printing

Also use infill with less linear pattern, for example honeycomb.

Re: Problems with ABS printing

The problems you are experiencing are common with ABS. Here are steps I took to mitigate:

1. Lot's of brim. I use S3D to slice, and under the additions I use 10 skirt outlines and the part offset is 0.00mm, meaning the skirt is attached to the part. This helps hold the corners down a bit.

2. I found a giant cardboard box that is big enough to fit on top of the printer. Once the first layer has started, I put the box on top and I don't pick it up until the print is fully done and cooled.

That seems to have solved 100% of may ABS curling issues for now until I build a better enclosure.

Re: Problems with ABS printing

Also use infill with less linear pattern, for example honeycomb.
Good tip thanks!

Print with something else than ABS? 😀

Sorry, not the solution to your problem, you've got some good tip here already, try those! But also look into other plastics, there are a lot of really good plastics with similar characteristics as abs, but without the warping and toxic fumes.
Yeah i know there's a lot of other options, but now i have some ABS and i want it used!

Then you just need to let it cool as slow as possible, and make sure you have really good adhesion (abs glue or similar).
No fan, hot bed, enclose the printer if possible.

Best Regards Patrik
Fan is off, bed is hot (Or at least the printer thinks it is).

I use a lot of brim and keep the PEI bed particularly clean with isopropyl alcohol.

EDIT: Can you share the model? I would like to see how I fare.
Model attached. My print settings were Bed: 100 C. Nozzle 1st layer 270 C, rest 260 C. 0.15 mm layer hight, 3 perimeters, 3 bottom, 4 top, 10 % Grid infill.

I started wondering if my heatbed actually is 100 C when it says it is, so i placed a thermometer on the bed while cold, and let it stay there a while to get the ambient temp. Ill let the pics talk for them selves:

So according to this the thermistor in the bed is of by 8 C, and assuming the difference stays linear while hotter, that means that if i set the bed temp for 100 C then is actually only is 92 C. So i guess ill try turning the bed temp up.

Re: Problems with ABS printing

yes, some temp calibration would be nice.

Re: Problems with ABS printing

There is nothing linear about an NTC thermistor...

However, they are pretty accurate (around 1%) across most of the range; lower temps are pushing their capabilities.

You do have to take account the positioning of the thermistor and the fact that the bed is heated rather unevenly. Best to use either a FLIR or IR thermometer to take readings at various points across the bed.

Peter

Re: Problems with ABS printing

Or even better, check to see where the thermistor is taped underneath the bed and take a reading right above that point. IR thermometer is the best choice.

Re: Problems with ABS printing

I have also been having issues printing ABS, and so far the best way to make prints stick to the PEI sheet for me has been to use the glue stick that came with my kit.

Hoe that helps.

Re: Problems with ABS printing

I have also been having issues printing ABS, and so far the best way to make prints stick to the PEI sheet for me has been to use the glue stick that came with my kit.

Hoe that helps.
I found that turning the temp up to 110 C helped. After doing so i only experience very mild lifting in the end of very large ABS prints