Week 7. Computer Controlled Machining¶
This week I experimented with computer design to be worked on a CNC machine.
Group assignment:
- Complete your lab’s safety training
- Test runout, alignment, fixturing, speeds, feeds, materials and toolpaths for your machine
- Document your work to the group work page and reflect on your individual page what you learned
Individual assignment:
- Make (design+mill+assemble) something big
Learning Outcomes¶
- Demonstrate the design of 2D and 3D figures in the onshape program for milling them.
- Show step by step procedures for obtaining cnc production.
Final result: After manufacturing¶
I had never designed something like this, I had worked in a carpentry shop but only moving wood, in addition the CNC machine has the characteristic of having a work bed measuring sixty by fifty centimeters. However, the results were achieved.
Links¶
Group assignment:
As a team effort under the supervision of local and global evaluators, a safety talk was held in a CNC production workshop.
Obligations and prohibitions signs.
Obligation signs
Other obligations
Hearing protection
head protection
Eye protection
How to protect our bodies in the workshop.
Prohibition signs
More prohibition
Finally, we obtained a certificate for the training course we took, we have acquired safety experiences in the work environments of a CNC machine.
First steps¶
Preparing safety equipment in the work area.
Already with the respective protection for safety
Turning on the equipment
Showing revolutions per minute control initializing from zero
After starting with the green button, begin to increase the revolutions of the bur.
Increasing the revolutions of the cutter
From the computer calibrating and setting the three initial axes whether x, y, z
Placing the work material, in this case mdf
Taking out the strawberry.
Placing the corresponding strawberry.
Placing the protector to avoid watering the bit of material that is going to come out
Already in the process of milling a design.
The first milling result learning the depth settings.
The three milling tests with different depths of the model.
Design¶
In this first image in sketch 1, with the line tool, we are beginning to draw the final product, which would be a bench.
In the following image, specific values are being given for the size of the design.
Then you are assigning the inside tilt angles.
Using offset we make an image inside the drawing.
Then we insert a horizontal line at the bottom as shown.
Then with the trim tool we remove the excess part.
Then we eliminate what is left over so that it is as follows.
Then we draw a rectangle at the top with the measurements shown.
We draw with offset on both sides.
Then we eliminate the remaining parts to be as follows.
In the next step we continue drawing with offset in the middle part.
Then we delete the middle part so that the design is as follows.
Then we extrude the figure.
In this figure it can be seen that we duplicated the previous figure and then modified the middle part for the fit.
Part of the design is removed so that the lace remains as shown
Then we extrude the second shape that will fit the first
We design the third figure that is going to be part of the seat and then we extrude it.
In the assembly sheet we insert the three figures to be joined.
Next we join the two objects as shown.
Then we assemble the third object that corresponds to the seat.
Below is a preview of how the bench looks
__________
Then custom colors are assigned, so the final design remains.
Starting with the printing of the first piece
Second piece cut with a CNC machine
Supervising the work of the machine in case any problem occurs
Finished piece of bench legs
Accident on one of the legs of the bench while adjusting it and then it broke.