cnc stuff

docs/Assignments/week_7_computer_controlled_cutting/computer_controlled_cutting.md

@@ -0,0 +1,251 @@
+# Computer controlled cutting
+
+## How to set up the machine for use
+* Clean the machine and sacrificial layer
+* Make sure the machine is clear of any obstacles
+* 
+
+
+## Machine safety
+Machine needs to be clear of any obstacles
+The machine needs to be clean
+
+
+Make sure the sacrificial layer is clean so the material on top is flat on the bed.
+
+Make sure the rails of the machine are clear and clean
+
+When you do the assignment do it alone. Because there are a lot of steps. If you forget one step you have to go back to step 1 and re-do everything.
+
+
+**Never** touch a running machine
+
+
+Always check the ways out before you start the machine. Know where to leave in case of emergency.
+Make sure you know where the fire extinguishers are
+
+Center of the mill is called the wedge
+
+
+Vacuum tube sucks all the excess material. (chips of the cut wood)
+It is the perfect environment for fires or dust explosions
+
+How to get something on fire. When the milling bit hits something metal or a screw. That creates sparks.
+
+### Vacuum system
+The vacuum is to suck up all the residue of the milling. In case the milling bit hits a screw. You instantly turn off the machine and check the bag.
+
+If its on fire throw it out of the window.
+If its not on fire. You have the inspect the bag closely for some time.
+![alt text](image-7.jpg)
+In case of emergency you can push the big red button and the machine will also turn off 
+
+![alt text](IMG_8623.jpg)
+This is the clip holding the bag in place. Pulling the clip will let the bag go.
+### Personal safety
+If you have long hair. Make sure your hair isn't loose. Use a hair band.
+Make sure you don't have any loose clothing or other accessories on you.
+
+Make sure you're not stressed, tired or in a bad state of mind.
+
+## Using the shopbot
+### How to change the milling bit
+The plastic cover attached to the spinning part is called the dust shoe. Take it off the machine using the butterfly nut at the back.
+![alt text](image-2.jpg)
+![alt text](image-1.jpg)
+
+Shaft size needs to be the same as the collet size. The collet is the part of the assembly that holds the milling bit
+![alt text](IMG_8604.jpg)
+First attach the collet to the nut. Then after that you can put the milling bit in. Like this
+![alt text](IMG_8612.jpg)
+not like this!
+![alt text](IMG_8607.jpg)
+
+Make sure you don't push the milling bit too far into the collet. Otherwise you may break the drill bit.
+![alt text](IMG_8615.jpg)
+![alt text](IMG_8614.jpg)
+This should be the good length
+
+Then you can go fasten the assembly to the machine. Make sure it is screwed on tight but not too hard so you still can get it off.
+The key is connected to the tool that is used to change the spindle. The reason they are connected is so the head can't be spinning when changing it.
+![alt text](IMG_8591.jpg)
+![alt text](IMG_8616.jpg)
+
+Always put away the tools when you're done. Always put them in the same place.
+![alt text](image.jpg)
+Fasten the dust shoe afterwards using the same butterfly nut.
+![alt text](image-2.jpg)
+
+### Preparing the machine
+There are 2 different softwares on the machine. The V-Carve and shopbot software
+* V-Carve is for making toolpaths, Fusion also could be used for this.
+* Shopbot software is used to send gcode to the machine.
+
+We use the Shopbot software so we can't change any parameters. Because it can really mess stuff up. 
+
+First turn on the machine before turning on the shopbot software. Because when the shopbot software starts it attempts to connect with the machine.
+![alt text](IMG_8620.jpg)
+**Don't turn the key yet. Turn it before you start the job**
+
+This is how the shopbot software looks:
+![alt text](IMG_8631.jpg)
+
+Go to command field and press `K`
+Then you open the Keypad window. In there you can move the machine and the spindle. In there you can use the arrow keys for X and Y. For the Z axis PAGE UP and PAGE DOWN is used.
+![alt text](image-3.jpg)
+
+The reason why the screen and keyboard is angled this way is so the keys correspond with the direction is going.
+![alt text](IMG_8634.jpg)
+
+First thing you do when you turn on the machine is press the `Zero X Y` button.
+![alt text](image-4.jpg)
+
+After you've done that the X and Y should be zero.
+![alt text](IMG_8640.jpg)
+
+Now make sure again that the plate is clean. Then we can do the Z axis calibration. We do the `Z` leveling on the sacrificial layer. We put the plate that is attached to the machine under the bit and press the `level Z axis button`
+
+![alt text](IMG_8642.jpg)
+![alt text](image-5.jpg)
+![alt text](IMG_8655.jpg)
+
+After that we can put the material on the machine and fasten it.
+The screws should go into the sacrificial layer but not in the layer under it. We use woody screws. Yes they are literally called woody screws.
+![alt text](IMG_8667.jpg)
+
+When drilling the plate onto the sacrificial layer you should put force on the plate because otherwise it will go up and the material needs to be flat on the sacrificial layer.
+**This is wrong!**
+![alt text](IMG_8673.jpg)
+This is good. Make sure to press down on the material as your drilling it into the sacrificial layer.
+![alt text](IMG_8676.jpg)
+
+
+#### Shopbot software
+After you've done everything to prepare your job file. You can go back to the shopbot software. In there you need to go to the job home. Your job home is your starting point. Then you go to `[Z]ero > zero X and Y axises`. When you press that you will see on the control window the X and Y are both 0
+![alt text](IMG_8712.jpg)
+![alt text](IMG_8715.jpg)
+
+Then you can import the file.
+![alt text](IMG_8716.jpg)
+Then this window will pop up.
+![alt text](IMG_8718.jpg)
+**Once you press start the machine will start. Make sure the machine is clear of any obstacles or other stuff. MAKE SURE EVERYTHING IS TURNED ON. Vacuum, shopbot, Milling drill**
+
+
+Spacebar can pause the machine in operation.
+
+
+
+
+
+
+
+Pass depth should be half the diameter of the tool
+
+
+
+
+
+
+
+
+
+In your design you can make the drill holes to hold the material down. Then you would do these first before doing the rest of your design.
+
+
+
+
+
+
+
+
+What jog home does is. It goes to the start position of the last job
+
+
+
+#### The software
+
+##### V-carve
+
+Tabs are there to keep the object in place. You have to remove them afterwards by hand. Otherwise without tabs things may go flying.
+
+Fillet then add some sort of T-bone and Dog bone. 
+
+Make sure when you make modififications to re-calculate the tool path.
+
+Make sure to save both the shopbot file and the vcarve file.
+
+
+###
+
+When you open up the software it will ask for the job setup
+<insert image of vcarve>
+
+The first parameter is the material size and thickness.
+
+XY datum position is the starting position of the job
+updown Y
+leftright X
+
+<insert image of these settings>
+
+after you've set everything up you can click ok. After that you need to import the vectors.
+The best importing filetypes are .DXF or .PDF
+
+
+After that you can set the vectors on your board en tweak it. 
+
+Then you can create toolpaths
+First drilling toolpaths
+
+
+The first thing we add ourselves are the screw holes marks so we can screw the material in place. These don't have to get drilled through the entire material.
+
+For the outer cut. create a seperate toolpath and make sure the cutting depth is the height of the material. Don't forget to add tabs.
+//TODO: more material more tabs
+
+
+Pocket toolpath. Is for not cutting through the entire material but for creating a pocket in the material. For most cuts we're going to use this
+
+always do the outer cutout last and do the screw holes marking first. After screwhole marking do the screws then you can do the rest of the toolpath jobs.
+Place the woodies atleast 1 cm from the outer cut.
+
+Save the screw markings and the rest of the design in 2 seperate files. So you can first do the screw marking and then afterwards the rest of the design.
+
+Offset and raster are 2 different paths of cutting
+
+
+
+
+---
+
+The higher stepover the smoother the wood
+//TODO: need to do something with this
+
+## F360 (Take this with a grain of salt because I had hard time following)
+Create design. Make it the height of you material
+
+When you're done you need to go to manufacture tab and then in manage.
+In there you need to select the machine. Make sure to select the right milling tool.
+![alt text](image-6.jpg)
+
+
+After that you can select how big the project is and how big the material is.
+You wanna set the origin/zero point at the bottom corners of the model. After you've done that you can press ok.
+
+Then you can select the top buttons under the 2D tab. To create toolpaths.
+
+When you create one of the toolpaths you will get a lot of settings to configure the toolpaths
+
+The toolpaths you create will show in the left menu.
+
+
+Under actions you can export the gcode
+
+
+You can also configure your own milling bits in fusion if yours isn't pre-configured.
+
+
+
+
+

docs/Assignments/week_7_computer_controlled_cutting/lecute_notes.md

@@ -80,7 +80,7 @@ Kerf - Offset by tool diameter
 Runout - The tool may not be attached straight to the machine so it will create sloped cuts
 
 
-klein machining - cleaner cut but harder on machine - for finishing
+climb - cleaner cut but harder on machine - for finishing
 Conventional - To start out with is easier on the machine. Is more rough
 
 2d top down
@@ -114,4 +114,19 @@ Never do large format machining alone
 You want a second pair of eyes and ears always check each other
 Need to be well prepared
 
-Know how to turn the machine off before turning it on
+Know how to turn the machine off before turning it on
+
+
+Before you start milling all the documentation has been done.
+
+
+
+### Extra notes
+If you set the RPM too low it can't calculate the toolpath. For some reason when you change the rpm the the starting point changes when cutting a line.
+
+Pocket allowance = offset
+
+When doing the corners of a cut with filet. You need to double click the corner.
+
+Check the grain of the wood. One side works better than the other.
+TODO: add this to main docs