Hi all, I've been trying to tune my i3 and I'm pretty much there. Extrusion is on the whole good and when I print test pieces the X/Y are spot on. One issue I'm having and don't really know how to address is that all of my test pieces are coming in 0.48-0.50 mm too tall. The error doesn't seem to change with object height e.g. a 10mm test cube comes in at 10.50mm and a 20mm test cube comes in at 20.50mm so I don't think it's an issue with my z-axis steps calibration. On the Z-Axis I'm using a capacitance based probe and auto-bed leveling. I have the negative offset configured in the Marlin firmware (~-3.2mm) which takes the nozzle down to about 0.1mm above the bed with the hotend cold as per the various setup guides I've read this should be about right. I don't have any issues with first layer adhesion and I get the same result with test parts printed at different bed locations so I'm pretty sure the glass is flat and the auto-level is working properly. I'm at a bit of a loss as to what to look at next. Any suggestions? Thanks, JBFUK. https://reprap.org/forum/read.php?406,715541,715541#msg-715541 Tue, 21 Jul 2026 04:09:44 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?406,715541,716197#msg-716197 https://reprap.org/forum/read.php?406,715541,716197#msg-716197
Is this object really 10mm or 20mm?

what happens if you turn off auto bed level?

First layer extrusion width 200% ? 150% ? 100% ??

What else is constant with every print?]]> Veesta Prusa i3 and variants Sat, 22 Oct 2016 04:59:32 -0400 https://reprap.org/forum/read.php?406,715541,716106#msg-716106 https://reprap.org/forum/read.php?406,715541,716106#msg-716106
Nozzle is 0.4mm and I'm using a fixed 0.5mm width for perimeters (which are coming out spot on).

I'll change my first layer height to 0.2mm in the morning and see what the result is.]]> JBFUK Prusa i3 and variants Fri, 21 Oct 2016 15:26:31 -0400 https://reprap.org/forum/read.php?406,715541,716099#msg-716099 https://reprap.org/forum/read.php?406,715541,716099#msg-716099 first layer height?]]> Veesta Prusa i3 and variants Fri, 21 Oct 2016 14:58:38 -0400 https://reprap.org/forum/read.php?406,715541,716064#msg-716064 https://reprap.org/forum/read.php?406,715541,716064#msg-716064 JBFUK Prusa i3 and variants Fri, 21 Oct 2016 12:28:55 -0400 https://reprap.org/forum/read.php?406,715541,716062#msg-716062 https://reprap.org/forum/read.php?406,715541,716062#msg-716062 Maybe slight over extrusion in n number of layers that eventually mounts to 0.50mm. You have same amount of top solid layers in each print?

Just thinking if it possible to set top solid layers to 95-98% and see if it has any effect?]]> Veesta Prusa i3 and variants Fri, 21 Oct 2016 12:17:19 -0400 https://reprap.org/forum/read.php?406,715541,716023#msg-716023 https://reprap.org/forum/read.php?406,715541,716023#msg-716023 JBFUK Prusa i3 and variants Fri, 21 Oct 2016 10:33:02 -0400 https://reprap.org/forum/read.php?406,715541,715541#msg-715541 https://reprap.org/forum/read.php?406,715541,715541#msg-715541
I've been trying to tune my i3 and I'm pretty much there. Extrusion is on the whole good and when I print test pieces the X/Y are spot on. One issue I'm having and don't really know how to address is that all of my test pieces are coming in 0.48-0.50 mm too tall. The error doesn't seem to change with object height e.g. a 10mm test cube comes in at 10.50mm and a 20mm test cube comes in at 20.50mm so I don't think it's an issue with my z-axis steps calibration.

On the Z-Axis I'm using a capacitance based probe and auto-bed leveling. I have the negative offset configured in the Marlin firmware (~-3.2mm) which takes the nozzle down to about 0.1mm above the bed with the hotend cold as per the various setup guides I've read this should be about right. I don't have any issues with first layer adhesion and I get the same result with test parts printed at different bed locations so I'm pretty sure the glass is flat and the auto-level is working properly.

I'm at a bit of a loss as to what to look at next. Any suggestions?

Thanks,

JBFUK.]]> JBFUK Prusa i3 and variants Thu, 20 Oct 2016 05:00:26 -0400