3. Computer controlled machining
This week we used CNC milling machine to cut something big from plywood. Cut CNC test together.
Documentation
Creation
- Designed using Rhinocerous, inspired by gothic arc.
- Used usual Rhino commands: polyline, fillet edge, extrude, move, 1D scele and so on.
![2](../images/screen/mil/mil_1.jpg)
- Set matetrial sizes and Z-axis origin referring to material.
![2](../images/screen/mil/CNC_1.jpg)
- Setting tab for 6mm diametre flat tool (for plywood using down cutting milling cutter).
![2](../images/screen/mil/CNC_2.jpg)
- Pocketing of joint holes, setting speeds.
![2](../images/screen/mil/CNC_3.jpg)
- Pocketing safe plane setting tab.
![2](../images/screen/mil/CNC_4.jpg)
![2](../images/screen/mil/CNC_5.jpg)
- Pocketing cuts preferences and depths.
![2](../images/screen/mil/CNC_6.jpg)
- Pocketing preferences of entering and exiting material.
![2](../images/screen/mil/CNC_7.jpg)
- Set minimum distance tool optimisation.
![2](../images/screen/mil/CNC_8.jpg)
- Axis Profiling Exit / Entry settings have to be Along Path to not destract exterior material.
![2](../images/screen/mil/CNC_9.jpg)
- For Engraving (screws pointing) safe plane should be twice higher, because when material not screwd, it is more curved.
![2](../images/screen/mil/CNC_10.jpg)
- For Engraving Exit \ Entry settings shouldnt be defined, to make only Z-axis movement.
![2](../images/screen/mil/CNC_11.jpg)
- To make algorithm for CNC need to Post slected cutting trajectories in correct order.
![2](../images/screen/mil/mil_2.jpg)
- Machine ON by turning switcher.
![2](../images/screen/mil/mil_3.jpg)
- Changed tool and clened collet.
![2](../images/screen/mil/mil_4.jpg)
- Placed material, put collibration button on material.
![2](../images/screen/mil/mil_5.jpg)
- Started programme for screws, screwed.
![2](../images/screen/mil/mil_6.jpg)
- After collibrated Z-axis again (screwed material more plane).
![2](../images/screen/mil/mil_7.jpg)
![2](../images/screen/mil/mil_9.jpg)
- Started to cut
![2](../images/screen/mil/mil_10.jpg)
- Bridges done well.
![2](../images/screen/mil/mil_11.jpg)
- Simulation corresponds to cutting process and looks good)
![2](../images/screen/mil/mil_12.jpg)
- This plywood quite soft,easily cleaves.
![2](../images/screen/mil/mil_13.jpg)
- Air pump ON.
![2](../images/screen/mil/mil_14.jpg)
- Mostly done.
![2](../images/screen/mil/mil_15.jpg)
- Tried to pump by vacuum cleaner, after used air pump.
![2](../images/screen/mil/mil_16.jpg)
- Used chisel and hummer to break bridges.
![2](../images/screen/mil/mil_17.jpg)
- Material was 15 mm, not 10 as I thought, so joints holes were not correct.
![2](../images/screen/mil/mil_18.jpg)
- Next day I changed sizes of holes and height of shelf ot arrange it on least material piece.
![2](../images/screen/mil/mil_19.jpg)
- Changed tool.
![2](../images/screen/mil/mil_20.jpg)
- Collibrated X, Y and after Z-axis Origin position.
![2](../images/screen/mil/mil_21.jpg)
- Checked that coose correct file on screen.
![2](../images/screen/mil/mil_22.jpg)
- Screwed.
![2](../images/screen/mil/mil_23.jpg)
- Recollibrated Z-axis.
![2](../images/screen/mil/mil_24.jpg)
- Started to mill now holes have correct size, depth defined well.
![2](../images/screen/mil/mil_25.jpg)
- Remembered that need to switch on pump.
![2](../images/screen/mil/mil_26.jpg)
- Prosessing...
![2](../images/screen/mil/mil_27.jpg)
- Mostly done.
![2](../images/screen/mil/mil_28.jpg)
- Unscrewed.
![2](../images/screen/mil/mil_29.jpg)
- Vacuumed major part of chips.
![2](../images/screen/mil/mil_30.jpg)
- Cutted bridges by hummer and chisle.
![2](../images/screen/mil/mil_31.jpg)
- Now cutted well.
![2](../images/screen/mil/mil_32.jpg)
![2](../images/screen/mil/mil_33.jpg)
- Done. Actually milled not perfect, plywood too soft, chip off because of that.