What 3D printing project are you working on today?

[Epatcola]

Today I worked on a jig to attach the CR30 spectrophotometer to an old ender 3 clone printer I have.

It works pretty well although I still have a bit of tweaking to do. The build plate is 220mm square. I can't use all of it because the CR30 sits forward of where the hot end was. 26 rows and 28 columns of 7mm square patches is about as much as will fit on the plate and A4 paper. It took 23 minutes to measure the 728 patches.

I posted the initial idea here.

 

[Epatcola]

Today I worked on a jig to attach the CR30 spectrophotometer to an old ender 3 clone printer I have.

I finished tweaking the g-code and got it down to about 17 minutes to read the 728 patches.

I was using the CR30 bluetooth interface which proved to be unreliable randomly missing between 2 and 5 patches of the 728. It didn't miss any with a USB cable connection. The PC bluetooth is provided by a modern Intel wireless chip set and has an external antenna so you would think it should be good and the distance was around 10 feet.

Annoying because the bluetooth connection is convenient. I don't see why manual reading over bluetooth would not have the same problem and having to check that the PC got every measurement is tedious. If you are using bluetooth and notice you didn't read enough patches it might not be your fault.

A few seconds of video here. It might not stay hosted for long.