Crack on ABS

[Leo]

I thinks I have a very typical problem with crack on ABS, I searched in this forum, seems the most common suggestion is to increase the extruder temperature, but some said it is too risk to damage the extruder.

I'm using Orion and the default setting.

Thanks for any help! And looking forward for a ultimate answer for ABS crack/curling problem.

[nitewatchman]

Leo,

I run my extruder at 235C for ABS.

nitewatchman

[guanu]

that cracking typically happens if you are running the layer fan with abs... make sure you have the layer fan off

Guanu

[rymnd]

How cold is the room where you keep your printer? Try printing with the workspace covered/enclosed, maybe with just a cardboard box for starters. I had my printer in a room at 20-21C, and I had similar cracking problems.

Alternatively, if you have a small space heater or lamp lying around, direct either towards the print workspace and give it a go.

[Leo]

Leo,

I run my extruder at 235C for ABS.

nitewatchman

Dear nitewatchman,

Thanks for your reply, I'm preparing to increase the temperature as well, just worried as some others said, this will damage the extruder quick. So how is your case? Does the extruder last long in 235C?

Best regards
Leo

[Leo]

How cold is the room where you keep your printer? Try printing with the workspace covered/enclosed, maybe with just a cardboard box for starters. I had my printer in a room at 20-21C, and I had similar cracking problems.

Alternatively, if you have a small space heater or lamp lying around, direct either towards the print workspace and give it a go.

Thanks rymnd,

The room temperature during the printing is similar to yours, I agree the dramatic cooling down is the cause, how is your result when you using assistant heater source?

Best regards
Leo

[Leo]

Thanks guys, how do you think what's the most balanced stiff material for printing, for example, will nylon have even higher stiffness and without the cracking the curling issues as ABS?

Thanks!

[nitewatchman]

Leo,

I run my extruder at 235C for ABS.

nitewatchman

Dear nitewatchman,

Thanks for your reply, I'm preparing to increase the temperature as well, just worried as some others said, this will damage the extruder quick. So how is your case? Does the extruder last long in 235C?

Best regards
Leo

My printer has about 70 printing hours on it and it has only done ABS @ 230C to 235C. So far so good. I do have a replacement PEEK Tube however just in case.

With the PEEK Fan running I believe that it will be okay.

nitewatchman

[Polygonhell]

Thanks guys, how do you think what's the most balanced stiff material for printing, for example, will nylon have even higher stiffness and without the cracking the curling issues as ABS?

Thanks!

Depends what you are trying to print.
PLA is by far the hardest/stiffest material of the big 3 and has excellent "strength", but it tends to crack if you have tight fitting fasteners being pushed or screwed into it.
ABS can be very strong, but the interlayer layer adhesion is heavily dependent on the print temperature, I prefer it over PLA for mechanical components because it tends not the crack when tight fitting fasteners are inserted
Nylon is semi flexible, but also very resilient and if you can get the stuff to stay flat can be great for mechanical components, Taulman Bridge is very easy to print when it prints. My first batch was out of tolerance, and wouldn't reliably feed, when I contacted Taulman about it they replaced it without me asking, they think the issue was tolerance at the beginning or end of a batch, but I haven't has a change to test the replacement filament. The other Nylons can be a pig to print if it has any sort of reasonably sized flat area.

I have a lot of hours on my Max, I print ABS in the 240-255 range, sometimes with a fan despite conventional wisdom, but I'm not using the stock hotend. I find much lower than 240 and layer adhesion is questionable.