WEEK 7 - COMPUTER CONTROLLED MACHINING

me using the table i made in the computer cutting week

i am really missing this week since i am not in town..........

but i am trying to complete my design and document it. so that i cant can do the machining after arriving at the lab.....

after ages..

i am planning to make a furniture which i can use during my fab days. there should be a moving part too...

You can find our group page here and this week group ASSIGNMENT here. we tested the design rules for different 3d printers in our lab

test cut for this week

after a long time searching for inspiration . i found this design from pinterest

from pinterest

i started designing with fusion. i have done PARAMETRIC KIT in WEEK 3 - COMPUTER CONTROLLED CUTTING .

after evaluating the scaled down design i modified the design to make it stronger and steady.
i designed the file for 12 mm plywood EVEN THOUGH i have parametric size.

i added finger joints for attaching 2 parts

A dog bone is added in CNC wood carving to ensure that inside corners of pockets or cutouts fit sharp-edged external parts. Since CNC routers use round bits that leave rounded corners, the dog bone creates a small circular cutout at the corners, allowing for precise and snug assembly of interlocking parts.

nifty dog bone is installed from from fusion extensions and added in fusion

dog bone of dia 6.mm is added.

finally i arranged -> created dxf file -> exported the design like in the WEEK 3 - COMPUTER CONTROLLED CUTTING .

i went to shop bot

Computer-aided manufacturing (CAM) is the use of software and computer-controlled machinery to automate a manufacturing process. As its name implies, CAM does this by controlling machine tools in the production of goods

shop bot cam is 2.d. so its not tha ttime consuming.

v -carve pro is the software to cam its files.

this is the interface of vcarve pro.

i MEASUREd the size of job all corners to confirm its thickness. its came around 11.8 mm. and updated in the vcarve pro.

i added job settings with job size which give it a border.

the interface allows to move, transform and edit the drawing.

i arranged the PiecES MORE OPTIMALLY to save space. the round pieces is not mine but my FRIENDS.

i added these pocket hole of size 4 mm depth .i added the tool size which is single flute 6 mm in size.then i done it for REMAINING two TOOL PATHS.

then i save the file in drill1.sbp format.

subsequently added outer and inner tool paths and saved . then i headed to the command console .

i added tabs in the drawing so that the cut pieces won't get THROWN out or misaligned while milling

my 2d profile

I divided the milling in 3 parts: Drill (Pre-drill),Inner Cut, and Outer Cut.


my 3d profile

Once the toolpath files are ready, next step is to open the ShopBot's software ShopBot 3.

the machine we using is Shop Bot PRS Alpha 96 CNC Router

shop axis and parts

Features

Bed Size: 1.7526x2.438m
Table Thickness: 3/4" Plywood Bottom Layer & MDF Top Layer
Stationary Bed
Tool Module moves in X,Y, and Z directions

when working with shop bot safey very COMPULSORY . so use PERSONAL safety equipments WHENEVER using shop bot.

i turned on the shop bot

The next step is to set the origin. To do this, jog the module along the X and Y axes to set their zero positions. For the Z axis, use the plate and alligator clip provided with the machine. The machine will detect the position when the clip and metal plate make contact, and it will automatically set the Z axis to its zero position.

When all three axes are set to zero, click on "Cut Part" to upload the file. Then click on "Start." A pop-up box will appear, prompting you to turn on the spindle. To do this, turn the key located on the side panel of the machine once.

Now press Start button on the remote and once the spindle starts spinning,click OK on the dialogue box

after drilling the camping holes i clamped the work piece with screws.

we have to be ready to press emergency button WHENEVER a event occurs. SUBSEQUENTLY i milled all my outer and inner files.

after the milling

then using a chisel i RELEASED each piece after removing the clamping screws .

unfortunately our shop bot stopped working at the end of the milling, motor driver damaged. some pieces didn't got milled🙂.

asome pieces like this too.

i completed remaining pieces using zund in our lab.

i sanded using the orbital sander to finish the pieces.

now let's head to the assembling. assembling was quet easy, thanks to the planned designing.

my standing desktop table came really nice and i like it.

design files