Drawing

-Import the vector file then right click and check open files and duplicated lines. Join it if not to join, it could not calculate toolpath. Fillet can make bone

-I clicked fillet to make dob-bone to fit the joint. Check the tool radious.

Toolpaths

-When I finish drawing, I can make the toolpath. Tool path window is on the right upper coner of the window.


-Profile: depth should be deeper than real thickness of matarial(+0.5 would be ok), always click Ramp!



-1. Edit: I Set up the feedrate and rpm here.
-Stepover is recommaned 1/2 of tool diameter. I did 40% of it.
-Pass Depth is recommaned 1/2 of tool diameter.


-For incut and outcut, I need tabs. if I made a tab followed by material, when I detatched it, teared the matarial off. So make oppisite direction of material would be better.


-check preview.

Shopbot

Let's start Shopbot! and.. mistakes from starting OTL


-This warning came out when I opend software before machine started. So make sure that start machine before software!


-Set up X,Y by manually. And Z automatically.


-I had to setup xyz before open the file. and open the spindle control window from tool>spindle control.


-When I save the toolpath from v-carve, Shopbot automatically opens the file. Select CUT PART. first time I was scared to press this button. I thought I start the machine right away. But it is not, so don't worry.


-When machine start to cut off, check the spindle speed from shopbot machine.


-don't forget to turn on the vacumme.


-finally it start!

Feedrate and RPM

-I calculated the recommaned feedrate and rpm using chipload chart. Upcut endmill shoud decrease 20%, and downcut endmill 40%. so I multiple 0.8 and 0.6 for each type of endmill.


-I tested on soft plywood. RPM1000, feedrate 120 was good and RPM 15000, feedrate 100 was also ok. So I tested other cut with 15000, 100 because I thought it would be faster.

Cut Type

-I also tested cut types such as outcut, incut, oncut, pockets with raster and offset, convetional and clime.

Test Joint

-I tested some joint from my design. For the pocket slid, offset value -0.1, for peanut shaped joint offset value -0.5 was good. And I decided incut also do -0.1 offset.


-for the slide more and -0.2 offset was good.

Marble Racer

-My kind and genius magic hand instructor Rodrigo gave me better wood for my assingment work. So I find another feedrate,RPM and offset value. 13000, 100 was good. (I tried 12000/110, 10000/120, 15000/100, 13000/100)



-The matrial did not cut well. because the wood bended a bit. I had to screwed up middle of the wood to tighten the wood.


-still working.

-still working.


-click here to download marble racer.dxf file.