Bed temperature for PLA and lifting of part

[Notewell @nigelberry]

Hi All

I have not used the standard bed temps for some time. Today when loading the new software I used the standard temps by accident. Found the resulting print hard to believe.

I was printing a downloaded Pi camera case. The attached pic shows the standard bed temps on one part and a part printed using the temps I have arrived at which I find work well.

First layer 75 the rest at 55. I am not suggesting you use these temps, I am merely passing on what I do and the result I get.

Nigel

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[click @click My Robox is a Green Kickstarter Limited Edition]

Thanks for sharing.

Let me just check: part that is done in PLA and one that is nice and flat is printed with first layer at 75ºC (rest layers at º55) while one that is warped is printed with first layer at 65ºC while rest at 55ºC (standard temperatures if I remember well).

What PLA is that?

BTW Of course - we were talking BED temperatures… Right?

[Notewell @nigelberry]

Hi

CEL PLA and the new standard temps for the bed seem to be 70/65. This is how the bad part was printed, I forgot to change the temps after installing new software.

I (and a friend) use 75/55 and find it works for us. We do adjust the nozzle height ourselves to make sure we are getting plenty of squish on the first layer. We find normal calibration does not always get it right, not the way we like it anyway.

My friend has also changed his bed temps for CEL ABS and uses 125/105 to get good results. he found the standard temps (125/115) caused too much lift so he changed them, much as I did for PLA

Nigel

[click @click My Robox is a Green Kickstarter Limited Edition]

Ah, I see now. So, you have actually lowered ‘rest-of-the-print’ temperature and got better results! I though increasing first layer temperature helped. Or maybe just making bigger difference between two. Hm. Definitively worth giving it a go…

BTW I think it is important for such ‘tests’ to be done from cold Robox always. Printing something with one temperature and then changing it and printing new stuff immediately after can cause wrong conclusions - Robox interior may continue to emit some heat after a print, while printing from cold could cause ambient not to be exactly at the temperature one would expect.

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