Simplify3D User Forum

Is anyone else having an issue in 3.01 with models printing shorter than they're supported to be.
I suspect it's something weird with layer heights.

The weird thing is the g-code previews fine.
However, it's not my machine, cause I just ran a print with 2.2 and got a fine result.

So if the g-code is the right height (in preview), why is it coming out squashed?

I'd start by looking a the actual G code itself, if there is squashing caused by S3D then you will see it in the Z height increments, is if your layer increment is set to 0.2 then you would expect top see in the code Z0.2, Z0,4, Z0.6 etc.

Also look at the last layer Z height and compare it to the actual height of your model, and the desired height of the model they should match.

At the end of all this there are four possibilities....

1) the height of your model matches the last layer z height and the Z increments don't match your layer height
2) the height of your model is shorter than the last layer Z height and your increments do match your layer height
3) both the height of the model and the layer heights are wrong
4) both the height of the model and the layer heights are correct.

these four problems point to these tissues

1==something screwy in S3D
2==something screwy with your printer, check the steps per mm is correct and there is nothing loose or jamming
3==everything is screwy
4==just this topic is screwy

OK.
So manually reading the g-code.
The layer height is set to 0.2mm (; layerHeight,0.2)
However layers are increasing in 0.15mm increments.
The "layer height" is not the actual layer height, but I that's just the Z-offset. which is also coincidentally set to 0.15.

; layer 34, Z = 6.79
; tool H0.200 W0.450
; inner perimeter
G1 X76.055 Y88.393 F4800
G1 Z6.940 F1000

; layer 35, Z = 6.99
; inner perimeter
G1 X72.790 Y72.730 F4800
G1 Z7.140 F1000

Now for the really weird part:
Final layer height is as it should be:

; layer 444, Z = 88.79
; inner perimeter
G1 X72.311 Y79.646 F4800
G1 Z88.940 F1000

When I ran in 2.2. I got the expected result. Right height.
And the print before 3.01

I was using the old (2.2) machine control panel with the new g-code (3.01) but that shouldn't make a difference should it? There's nothing funky going on with the control panels?

Using an old Leapfrog Creatr, only using 1 of the 2 extruders.

So the possibilities lead to bkgdavis assessment
1) z increments don't match. Something screwy in S3D.

Report the bug?

If the last layer of your code is correct at 88.79 and that it has taken 444 layers to get to this height then I can conclude that each layer is 0.2mm, this actually puts you in option

2) the height of your model is shorter than the last layer Z height and your increments do match your layer height

this leads me to conclude that S3D slicing function is working correctly

BUT... I didn't take into account that you were using the S3D control panel..... my printer just downloads all the code to the printer and runs it from there, so for me S3D function ends at the slicing... for you its only really just starting.

This introduces another variable to the mix, because the control panel by operating in drip feed actually becomes part of your printer control system, then its possible that there is nothing wrong with your printer, and your subsequent test backs that up, but there is actually an issue with S3Ds drip feed function.

btw looking at your picture its interesting to note that your squashing doesn't start until it gets to the nose!

I know right! What is going on?

There is a setting in "Edit Process Settings", in the tab "Other" names Horizontal Size Compensation. You might want to check if there's a non-zero value in it.
Just ran across this and thought it might apply.

I am getting the exact same thing, prints fine and then at around the same height as you, the squash begins.

I am guessing I have the wrong firmware installed??


Any ideas anyone?

http://support.lpfrg.com/support/soluti ... y-printer-

you have the 20mm firmware installed, not the 30mm.