We can make Almost Anything
This assignment is focused on converting the CAD drawing into the real-life objects. it's time to make something big which can be used by me and others in my day to day activities. I was thinking about the things that I simply make which can be used. I was thinking to make a Study Table for kids.
In Vigyan Ashram we don't have a CNC machine.We are Lucky to Study and learned two machines.On Thursday,First we had to go to College of Engineering Pune to use the shopbot machine there.and second we had go to Muktangan.
Shopbot PRSAlpha can cut material in the same way you would with a saw. It can cut in the X or Y direction.
The shopbot machine has 8'*4' standard bed size and able to cut wood and plywood. It has guideways in X, Y axis and a router is at the z-axis which is capable to spin 12000 rpm. So RPM is 20000 but while keeping it, we can keep 12000.We are using end mill as a cutting tool for this machine.
Specification:
On First day we have done our Group Assignment in COEP.For study and use this machine we discussed with Mr. Anasane from COEP.we were given a lecture by Mr. Anasane of COEP.
Shrihari is working in CEOP lab.he tell us about machine software works called PartWorks then we cut simple circle with differnt dimension.
NUMAC HITECH as Leading Manufacturer of very high quality Engraving 2D, 3D Profiles , Cutting ,Drilling Products with our best quality of CNC Router and Laser CNC Machine.
It has 3'*2' standard bed size and able to cut wood and plywood. It has guideways in X, Y axis and a router is at the z-axis which is capable to spindle speed 24000 rpm. We are using end mill as a cutting tool for this machine.
When Install shopbot
this all parts cuts on same speed and feedrate.
we take a rectangle with 80mm X 80mm.after cutting we got a kerf 0.25mm.we also cut circle in rectangular with 60mm diameter.we got kerf here is 4.2mmboth part cuts in inner diameter.but here we got a big difference in the kerf.
I am using a 6mm end mill.There are down-cut and up-cut bits, which will make different edge quality in the upper and the lower layer of the plywood when cutting through. Here is a table summarizing the different flute types
This is our tool assembly...
To make something big assignment, I don't make a big stuff, for this I make a small project like Study Table for kids. For making this I used the Solidworks software and follow the YouTube tutorials for making. Actually, I focus on the how much learning in using Shopbot, not in making any big things.
My object is around 3 X 2 feet.so,I decided my object cut on NUMAC HITECH in Mukatngan.
My Designing process are given below:Our Instructor Miss.Komal send us this link Dogbone From here i learn so important information about dogbone. In my design add dogbone design and check the cutting process according to the design. I learn about dogbone and how i measure it and what is the appropriate dogbone for proper fixing the board.
Dogbone -Dogbones are additional interior corner cuts for connecting parts. Dogbones one has to define herself for interior corners of connecting parts. Since the tool of a milling machine is circular, it is not possible to create sharp interior corners otherwise.
PocketingPocketing is for creating pockets, or pits in other words, into the material. One can create things like boxes or cups by using this strategy.
DrillDrill can be used to mark the skrew locations. Select the points which define the drilling locations.
NestingNesting refers to the process of laying out cutting patterns to minimize the raw material waste. Examples include manufacturing parts from flat raw material such as sheet metal.
So,I add the dogbone in my design.
Shopbot usually works with a
To make the gcode of path we used ARTCAM (2D).
To prepare gcode in ARTCAM,follow the stepsOpen Numac Machine Software called NC Studio.AD.firstly Unloaded previous files.then set the Origin in zero position.then open the saved file.
Before stating drilling I test file in dryrun with change feed rate .also checked Spindle rate.
After cutting my design parts I used sand file for sanding the edge of plywood for pressfit,Then I assembly my design some parts.
My study table looks like this.Completed this assingnment get lots support from Arundhati and Jaydeep Muktangan fablab team.
You can Download Original Files HERE.
In this assignment I learnt about CNC machining and designing. How you can make which is usefull and easy to make.