I have a CTC i3 with a ultrabase print bed added and having problems with the edges of printing onside warping (See attached picture) Its fine with small prints no lifting but soon as i go to a bigger print it warps the corner. PLA Details of settings Print heat @ 202C Bed @ 65C Brim with 6-9 lines First layer height: 0.3mm Print height 0.15mm https://reprap.org/forum/read.php?406,798247,798247#msg-798247 Thu, 10 Sep 2026 15:55:59 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?406,798247,803732#msg-803732 https://reprap.org/forum/read.php?406,798247,803732#msg-803732 i have the CTC i3 prusa and i have the bed at 60 and print at 215 and use masking tape works a treat also got the ally heatbed]]> Thereaper Prusa i3 and variants Wed, 03 Jan 2018 16:06:03 -0500 https://reprap.org/forum/read.php?406,798247,803585#msg-803585 https://reprap.org/forum/read.php?406,798247,803585#msg-803585 mjakes4178 Prusa i3 and variants Wed, 03 Jan 2018 05:00:03 -0500 https://reprap.org/forum/read.php?406,798247,798500#msg-798500 https://reprap.org/forum/read.php?406,798247,798500#msg-798500 www.thingiverse.com]

I found several links to various ways to rewrite the Marlin. I know the printer was super cheap but if you can't adjust anything or add the BLTOUCH, the board is useless. If it were me, I'd put an Arduino/RAMPS combination in there like my Folger Tech i3 2020 has and write good firmware to it.

This might even be more help! >> [www.3dhubs.com]]]> tjnamtiw Prusa i3 and variants Tue, 28 Nov 2017 14:51:30 -0500 https://reprap.org/forum/read.php?406,798247,798499#msg-798499 https://reprap.org/forum/read.php?406,798247,798499#msg-798499
I hate that these Chinese makers don't give out the marlin code. It really helps when you can modify things to solve problems such as changing the times for checking to see if you are up to temperature. Many times they are set too tightly and it will alarm and shut down because the temperature overshoots for even one second more than it's set for.

Let us know how it goes.]]> tjnamtiw Prusa i3 and variants Tue, 28 Nov 2017 14:39:58 -0500 https://reprap.org/forum/read.php?406,798247,798491#msg-798491 https://reprap.org/forum/read.php?406,798247,798491#msg-798491 I ended up printing the item on a raft with a brim to keep it stuck down as there was a skinny loop inside that feel off without.]]> mjakes4178 Prusa i3 and variants Tue, 28 Nov 2017 13:34:25 -0500 https://reprap.org/forum/read.php?406,798247,798466#msg-798466 https://reprap.org/forum/read.php?406,798247,798466#msg-798466
I have never seen a reason to use a brim or a raft in two years of constant printing unless the object has a VERY small footprint. I just run 1 or 2 skirts to get the flow going steadily. For me, the key indicator of a good first layer that will stick well and not lift is to measure the thickness of that skirt, or in your case, brim. For a good first layer, it should be about 0.25 to 0.35mm thick. I use a BLTOUCH so I adjust my Z offset to get that. If you use a Z switch then you have to fine tune that. I've used mirror tiles or borosilicate glass and hairspray only and have never had a print lift if I keep that first layer thickness in that range.

Your temperature really depends on the plastic. I run 200 first layer and 195 for the rest. Adjust it in 5 degree increments if you still get lifting after getting your first layer correct. Slow your first layer speed down to 50% of your normal speed of 40 to 50mm/sec as a starting point. Also make your first layer width 125% for more squish. Bed temperature 60 to 70C.]]> tjnamtiw Prusa i3 and variants Tue, 28 Nov 2017 12:07:23 -0500 https://reprap.org/forum/read.php?406,798247,798276#msg-798276 https://reprap.org/forum/read.php?406,798247,798276#msg-798276 I like this because it come in widths large enough to cover bed in one piece. And cheap enough so you can use it.]]> Roberts_Clif Prusa i3 and variants Mon, 27 Nov 2017 10:54:47 -0500 https://reprap.org/forum/read.php?406,798247,798270#msg-798270 https://reprap.org/forum/read.php?406,798247,798270#msg-798270 I use blue tape at 55c for PLA.
If you still have issues at a lower bed temp check the temp with a thermal heat gun - they are around $20.00]]> SteveRoy Prusa i3 and variants Mon, 27 Nov 2017 10:45:32 -0500 https://reprap.org/forum/read.php?406,798247,798249#msg-798249 https://reprap.org/forum/read.php?406,798247,798249#msg-798249
Try starting with these changes
PLA
Print heat @ 199C
Bed @ 54C
Brim with 6-9 lines
First layer height: 0.2mm
Print height 0.15mm]]> Roberts_Clif Prusa i3 and variants Mon, 27 Nov 2017 09:09:13 -0500 https://reprap.org/forum/read.php?406,798247,798247#msg-798247 https://reprap.org/forum/read.php?406,798247,798247#msg-798247 Its fine with small prints no lifting but soon as i go to a bigger print it warps the corner.
PLA
Details of settings
Print heat @ 202C
Bed @ 65C
Brim with 6-9 lines
First layer height: 0.3mm
Print height 0.15mm]]> mjakes4178 Prusa i3 and variants Mon, 27 Nov 2017 09:00:14 -0500