Settings for Sunlu TPU

Bambu Lab X1 Series Bambu Lab X1C
1

I’m only in my third week of 3D printing with my X1 Carbon and I need to make a small part using TPU. I ordered Sunlu TPU from Amazon. Reading the WIKI, it says you can use the Bambu settings if it’s got a hardness of 95A or higher. Sunlu TPU is rated at 95A. The WIKI goes on to say you can adjust the Print Speed from the Bambu setting. The recommended Print Speed for Sunlu is 20-40 mm/s.

I think I’ve got a good starting point, but I’d really like to hear you you guys/gals who have used this filament and the settings you use. I’m assuming you also use the Cool Plate, but correct me if I’m wrong. (I also know not to use the AMS with TPU)

Thanks for any help.

2 Likes
2

Hi,

  1. Dry your filament - !Critical!
  2. If you want good results, calibrate it ( flow dynamics and flow rate).
  3. Generic TPU profile works.
  4. Do not use AMS.
  5. Any build plate will work.
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3

Depending on the part, I wouldn’t say any build plate will work. Well, some work better than others. I prefer to use the Engineering plate with glue applied. Makes removing TPU parts much easier than on a PEI plate.

4

The TPU is still in its vacuum packed package with desiccant inside. Shouldn’t it be dry enough? I would think so.

If I use the Engineering plate, what temperature should I use on the plate?

Will I be ok using 20 mm/s for the Print Speed or just use whatever the Generic profile has listed?

5

Just a follow up to let folks know that I used the Generic TPU setting, changing only the nozzle temperature range to what Sunlu specified. Used the Cool Plate and my print came out perfect.

Thanks everyone

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6

What temperature worked best for you?

7

Set it to 195-205 and let the printer do it’s thing.

9

I am on my 13th straight TPU failure on my X1C. I have mostly only used Bambu filaments and likewise I am using Bambu Lab TPU 95A HF and started with Bambu’s predefined settings and this was the first time I found that the build-in settings not working.

I would not recommend using Bambu’s TPU settings even when using their filament.

In my effort of troubleshooting I found better setting for a TPU Benchy on Printables which helped and at least got me to the point of getting halfway though the first layer. Now the print just fails about halfway though printing the first layer, it’s multiple parts and usually fails around end of the 3rd or during 4th part).

After fixing the settings, and still getting failures, I suspected that maybe the spool was getting hung up and causing slipping in the extruder. I have my spool in a Sunlu filament dryer which a PTFE tube adapter so I can feed the filament as dry as possible straight to the side feed. After I load the filament I extrude enough length and watch the spool make a full rotation to verify the filament doesn’t just have slack that gets tensioned halfway through the first layer (i.e. I make sure the tension on the filament is the same when starting), so that doesn’t seem to be the issue.

My best guess at this point is that I still need to further fine tune the settings since I’m trying to print long narrow strips, but I don’t know really.

If I can conclude anything from this it is that the Bambu 95A HF TPU is just a gimmicky product. I do not think it can realistically print any faster or easier than any other similar shore TPU.

I’ll order and try a different brand TPU to see that is any better to print with the same setup.

10

Don’t know about anybody else, but I’m using Sunlu PLA on the Bambu PLA Basic settings and everything is fine.

11

Feeding TPU out of a hot dryer can cause issues because it’s softened.