CNC Lost Work Origin Mid Job

[brvdboss]

@fconeiljd

I have attached a photo of what occurred below. Which is why I thought my origin had been lost. It looks as if the starting point for the tool path had shifted. I’m not sure how a screw driven linear rail slips therefore introducing an offset into the build, but I suppose that may have been another cause.

It’s not the rail that slips, it’s the motor itself that thinks it has move forward, but because it was blocked actually didn’t. A stepper motor doesn’t counts the number of steps it takes, it just tries to do the number of steps it’s commanded to do. When it’s blocked, the it will be stuck in a place, but the program will think it actually made these steps

What seemed to make the most sense to me was that the long run time of the build ate up the memory of the device and caused an overwrite due to the need for more.

That’s still possible, based on personal experience not something I have seen, but then again I’ve never done a single toolpath that takes more than 10 hours or so. So it’s definitely possible.

I do not know how to make the snapmaker do multiple tool paths with a roughing pass followed by a finishing pass. I have been 3D printing for years, and this is my first attempt at CNC milling.

With Luban that’s a challenge, and apart for some simple relief carving I would recommend other tools. Fusion is the most popular one for users on the forum here. But it does come with a learning curve, but once you’ve got the basic setup covered, it’s relatively easy for standard toolpaths.

Additionally, I don’t think snapmaker supports nonplanar milling, but instead mills in layers like a reverse of 3D printing.

That’s actually a limitation of Luban that isn’t able to generate those type of toolpaths. The device itself is perfectly capable of that.

Looking at the picture, assuming thats a 15x10cm (6"x4") rectangle, a job like that shouldn’t take more than a few hours on the SM2 with the right toolpaths and milling bits.

To get started, this topic contains some useful info:

Snapmaker Academy: Fusion 360 CAD & CAM Tutorial for CNC Beginners

New to Fusion 360 and cnc milling? Come and check this Fusion 360 CAD and CAM video tutorial that is super friendly for CNC beginners. In episode 2 of Snapmaker Academy, we’ll show you how to create a 3d model, set up the manufacturing process, and carve it out with Snapmaker, from start to finish. Guess it would be a great opportunity to explore the world of model designing and CNC stuff. [Fusion 360 CAD & CAM Tutorial for CNC Beginners [Snapmaker Academy]]

There are some really nice tutorials you can find on youtube about Fusion 360 CAD/CAM as well