8. Computer controlled machining¶
Group assignments for the week¶
- Test runout, alignment, speeds, feeds, and toolpaths for your machine
Draw a test patterm¶
We draw a “Popsicle” shape to test and search a good margin setting.
When the outcomes getting bigger or smaller,
the edge of Popsicle will move up or down with a 1/cosin(θ) magnificator of the design angle. This file gives 10x magnification. (link for file at the bottom of page)
Test cut¶
Note: MDX-540 set user’s XY as working XY, mix with system XY will cause wrong positioning.
Test milling¶
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Install the end mill, power on the machine, set up originnal pint of user XYZ.
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Open Dr.engrave, draw a small Rectangle, move to a desire position.
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Set a higher position z axis to cut in the air.
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Set up the “printer” MDX-540, print to makesure the path doed not hit something.
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Mill It.
Broken end mill cartige¶
We try another setting, and break the end mill.
Test Resault¶
NOTE: This test is a wrong design and calculate but a good estimate.
Finally we find a opperatable set up:
Spining speed 10000 RPM,
XY-milling speed 40 mm/min,
Z-milling speed 5 mm/min,
Cutting deepth 3mm.
And Margin is between 54.6 (lightly touch) to 58 (press apply)
So the Margin range for design well be 2.73 to 2.9 mm (1.365 to 1.45 for each side).
I choose 2.75, but the resault shows tighter well be better if you do some after-mill works.
