Simplify3D User Forum

The First Layer Speed adjustment on the Layer tab isn't working as advertised.

In the attached file, I have the default printing speed set to 2500 mm/min, and the First Layer Speed set to only 1%.

When you preview the G-Code, the SECOND layer prints at 2500 mm/min, but the first layer is shown to print around 1800 mm/min when it should be 25mm/min.

More importantly, when I run the code, the first layer prints at 1800 mm/min.

Is there some 'minimum printing speed parameter' that I don't know about?

-Chuck
Flailing in NYC

PS - I actually ATTACHED the file.

For whatever reason, the cooling maximum slowdown defines the minimum speed that any override will slow down to. So if you lower your cooling speed override to 1% and it will slow down.

dorsai3d wrote:For whatever reason, the cooling maximum slowdown defines the minimum speed that any override will slow down to. So if you lower your cooling speed override to 1% and it will slow down.

Really? That is super weird. Well I just went to COOLING > SPEED OVERIDES > ALLOW SPEED REDUCTIONS DOWN TO and changed it to 1% and it totally worked. You are a genius.

I spent a while banging my head against a wall figuring that one out. No idea why it works that way, it seems like it's probably an overzealously applied programmatic limit.

Do you really want your first layer to take three and a half days to print????

If you have a first layer issue, then this sort of drastic action may not be the best way of resolving it! Or are you trying to take us as fools by quoting a rediculous value?

Doug, I figure it's a change to make it very obvious whether or not the change is having any effect, rather than actually wanting to take 85 hours to print the first layer. I do similar things sometimes when trying to figure out how some setting interacts with other things.

That's okay.....just checking, and ensuring its noted that the figure you stated was not a real value.

I can just imagine someone reading the thread and thinking that a value of 1% is a sensible value...and they try it and then complain about their nozzle freezing on the first layer!!