BL Touch Mesh: Create a new one for each print?

[Dan Flemming]

According to the videos I've watched on youtube, the ones I've watched say to create a new mesh for each print.

Can't exactly remember where, but i added a line of code to use the mesh.

Might have been in the printer sd card.

I'm really not sure if it's using a mesh, how can I find out?

What I've done:

I manual level, then save.

Create a new mesh and save.

I THOUGHT every print would use that newest mesh.

Am I doing it wrong?

[David O Smith]

What firmware are you using?

[3D Printing Tips and Tricks]

In my opinion…

If you’re using a rigid plate such as glass, you only need to update the Z axis offsets (“mesh” is a misnomer made by Prusa) when you make a major change like a nozzle or a complete refresh of the plate or a new plate.

OTOH, if you’re using a flexible plate, than you may be better off reprobing on each print. All my plates are rigid. On some of my machines such as the Ender3, they started with flexible plates but after I used them a bit I chucked them and got glass.

[LukeH]

I’ve had printers that were rock solid, and I created a mesh, and I got perfect first layers every time with just a quick Z probe in the centre of the bed. Other printers have been a little more problematic, and I’ve run a full 9 or 16 point level before every print (I start with 9, and just keep increasing the number of points until I get the results I need). I would usually add the commands to the start code for that printer in the slicer, that way I don’t have to remember which printers need it and which don’t - the printer just heats up, then levels, then prints.

For Delta printers I always run a Delta auto calibration before each print, and means that if one of the towers is out of alignment, I won’t matter.

In the end though, there isn’t a hard and fast rule - you do what you need to do to get a good print on the printer you are using. In the scheme of a 40-hour print, the two minutes it takes to run full bed levelling hardly seems like a big deal right? It probably takes longer for your bed to heat up…

[Dan Flemming]

Thanks for the replies.

I am getting great 1st layer adhesion, but my models are mostly on the smaller foot print size, and always in the middle of my removeable magnetic bed (upgraded).

I guess if I print 5+ at a time a re-mesh before would be insurance for success.

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[Dan Flemming]

David,

I use marlin firmware.