Skip to main content

Group Assisnment Week 3 - Computer Controlled Cutting

Write something at the front

This is the machine where we are going to do the cutting:

image

The brand is Da Zu Yue Ming CMA1610.

What are we the group going to do this week

The assignment is including tasks below:

  • Characterize your laser cutter’s focus, power, speed, rate
  • Determine the kerf & joint clearance

Test the machine and get the curf

We are going to use the acrylic board to do the cutting, for the first we need to know the thickness of it:

image

It is about 3mm, so on the Onshape I need to design a test board for testing the curf of it. Then I can make sure this board will be complete fit:

I design a board from 2.5mm to 3.1mm:

image

but it is a little no in the order, so I add some Variable Parameters:

image

for the width I think 1.5mm is fine.

Then I add the different cutting intervals as 1.5mm.

image

for the heigh I think 8mm is fine.

Then I add the different cutting intervals as 8mm.

image

Since the software for machine seems not supporting editing different contents, I have to make two layers for it cutting.

image

Then I output two DXF files:

image

And send them to the machine

image

note

The parameter is 95 Maximum light intensity, 90 minimum light intensity, 20 mm/s working speed.

And the power is 91.

Then I should have torn the paper off the acrylic sheet so it wouldn't catch fire:

image

Setting the zero ppoint:

image

Finally, setting the power of laser as 90%, and the speed as 20mm/S, as recommended before.

The I can send the file from the software to the machine and begin the cutting:

The first is brkoen and the second one is great:

image

But it also gave me a chance to see which one would fit right in:

image

I forgot to cut the text first. But after checking with the files I design, the curf should be 0.6mm.