Why two settings for Layer Height?

Discussions about ideaMaker and other printing software.
User avatar
Vagulus
Posts: 179
Joined: Mon Mar 25, 2019 5:27 am

Why two settings for Layer Height?

Postby Vagulus » Sun Jan 12, 2020 6:58 am

ideaMaker offers two settings or layer height, 'Layer Height' and 'First Layer Height'?
Why two?
Should they be different? If so, what is the advantage?

Thanks
--------------------------------------------
God so loved the World that
He did not send a Committee

Jetguy
Posts: 3022
Joined: Tue Mar 22, 2016 1:40 am
Location: In a van, down by the river

Re: Why two settings for Layer Height?

Postby Jetguy » Sun Jan 12, 2020 8:32 am

First layer depends on how well your bed is level and Z gap when home is adjusted.
Example is, let's say your bed isn't super level or perfectly flat.
Use a larger first layer so that there is room to comensate for the unlevelness.
Then you can use a lower layer height for the rest of the print for finer detail.

Jetguy
Posts: 3022
Joined: Tue Mar 22, 2016 1:40 am
Location: In a van, down by the river

Re: Why two settings for Layer Height?

Postby Jetguy » Sun Jan 12, 2020 9:09 am

Again, just some basics.
What is a raft? An artificially thick first layer printed on first layer and then the slicer adds the print as the next layers to provide compensation for poor leveling and first layer gap.

Or, skip the raft and just make first layer a fixed height.

What are the general pros and cons of layer height?

Low layer height means more layers, and longer print times.- mostly a con
Lower layer heights reduces the stair step effects on curved vertical surfaces- especially domes.
More prone to jams and print failures because the extruder must pressurize and smash the layer flat.
Prints can be stronger at lower layer height due to more surface area of vertical layer to layer contact.
If first layer is a low layer height, then more perfect leveling and proper nozzle to bed gap is extra critical or else the print may not stick.

Pros of tall layer height:
Faster prints due to less layers
Less prone to jams due to minimal back pressure inside extruder

Cons:
Visually more visible layers
Less surface area bond between layers- weaker parts in certain extremes
More visible and abrupt stair steps on domes or other curves.

User avatar
Vagulus
Posts: 179
Joined: Mon Mar 25, 2019 5:27 am

Re: Why two settings for Layer Height?

Postby Vagulus » Mon Jan 13, 2020 12:16 am

Thanks, folks. Both of you mention this idea:
Jetguy wrote:First layer depends on how well your bed is level and Z gap when home is adjusted.
Example is, let's say your bed isn't super level or perfectly flat.
Use a larger first layer so that there is room to comensate for the unlevelness.


Doesn't the presence of a 'Raft' fix that 'unlevelness' issue? And the issue of Z gap?
--------------------------------------------
God so loved the World that
He did not send a Committee


Return to “Software”

Who is online

Users browsing this forum: No registered users and 2 guests