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basic beginners mini 3 axis cnc mill

by:SNK     2019-08-26
I just worked as a CNC mechanic for 20 years.
Have a Fadal 4020 with an extension Z and make some neat gadgets with it.
I started working about 5 years ago after I got sick, investigated and bought some microcontrollers.
They all have their own ideas of making small machines.
And explore what makes it all better.
Above are two photos of my building starting and ending in 24 days.
I will update and more instructions around this project in the future.
Please enjoy and criticize my first guide and CNC competition if needed.
I took out two pallets from the CD player in my dump.
At the thrift store, 3rd was purchased for $7.
Remove the CD rotating motor and place it for standby. Cut 4 x 1/4-All threads 1. 25\" long.
12 nuts were also collected.
Small Hardware for limit switches: 2x 2-56 screws (x & y axis)4 x 2-56 nuts1 x 6-32 stud (z axis)2 x 6-32 nuts(
Use something available or necessary due to change)
Figure 1 shows all the materials, not the small hardware.
Figure 2-
Board limit switch, 6 pin port and 5 v motor.
Figure 3 shows the various switches in the CD player cover.
Figure 4 shows the pins we can use (
For future reference).
Figure 5 shows all screw stabilizer installations.
Figure 6 shows the change of the tray when the stabilizer is installed.
Figure 7 shows the screws and switches for the x and y axes.
Figure 8 and figure 9 show the switch positioning.
Connect using the existing holes on the X-axis and y-axis trays.
I had to open the diameter to clear my screws (2-56).
We put the new add-on
Limit switch for CD rotating motor point on PCB.
Pictures 11 to 13 show changes in the bracket and other limit switches.
And the trap of hope to avoid.
This is the lower base (Y axis)
Should/may be the substrate for all axes.
Figure 1 gives the basic dimensions and shows the list of parts.
1x1/4 board/size s4 x 1/4-
All threads 2 \"long12 x 1/4-
The 20 nuts8 x 1/4 flat wash plant 2 shows all the screw bolt construction.
Screw into the plate until the bottom is flush.
Lock it from the top to the board with a nut.
Figure 3 shows the mounting axis tray.
Pay attention to the limit switch we added.
I had some minor distractions and made adjustments around them.
Figure 4 shows the completed build and the dimensions to be saved. (1.
375 \"for reference).
I did this very early and it looks good and works well, but it\'s not necessary.
You can use the previous downplate and add 6-
32 all threads as shown in figure 4.
According to the theoretical picture. Note the 1.
250 \"dimension in figure 3.
If you use all the boards used to hold the shaft tray, use 4. 00\" x 3.
The external size is 15.
Hardware you need: 4x1/4-All threads 1.
750 \"long12 x 1/4-
20 nuts8 x 1/4 flat washing machine 1x6-32 all threads 1. 625\" long2 x 6-32 nuts 1\" x . 75\" x .
125 square washing machine. 145 dia. hole thru(custom made)
Figure 1 shows the through hole.
There are also some labels stuck here.
I filed them and made my cradle flush.
I will show you how to avoid file assignments when we have set the table.
Figure 2 shows the custom washing machine Board and 6-
All the threaded connecting shafts are together.
Figure 3 is the next assembly completed.
Figure 1 shows the hole pattern of U Bolt and hole size.
We should also pay attention.
250 \"through holes instead of 1/4-
20 threads for shaft tray attachment.
Two or four photos show the building.
Figure 5 shows our 1st traps.
I have to bend the label if so.
Figure 1 shows the old indicator base I have had for a while.
Figure 2 shows the axis components simulated on it.
If you need three H bridges, the first one is one.
I have shown where the signal is.
Note that the position of a yellow line from 1 k resistor is one by one. Sorry, this is wrong.
Part list for an H-bridge: 4x4401 transistors s4 x 1N4007 resistor 4x1 k various jumper wiresPic 2 shows three H-bridges and corresponding axes
The Pic Three is a 555 PWM circuit.
I have this here just for manual speed control.
This is some of the features I find myself bypassing it to get more energy.
Part list: 555 timer IC100k potentiometer. 01 uF capacitor.
1 uF capacitor 2x10 k resistor all kinds of jumper four is manual button control.
Figure 5 is the connection between the button and the H bridge.
Figure 6 shows the overall layout.
Pic one cleaned the 6pin port with the CD tray.
It is connected to the isolation tape.
I have cut the wire and connected to the other side of the barrier strip.
Figure 2 shows that the limit switch uses a green/white wire and the motor uses a black/red wire.
Figure 3 shows the x-axis connection.
Once it is wired, you can test it using the 5 v power supply of the micro controller.
You get a bounce effect if the limit switch is set correctly.
It will clog the gears if they are back.
Fix your green line in turn.
Figure 4 shows tests for other H bridges and buttons.
Figure 5 shows the 6 pin port being used.
Make sure to check all shafts and H bridges.
Figure 1 shows the hole size of the depth.
All threaded connection screws should be centered on the board.
The other two are used to connect the fixtures/sub-plates.
Two to five pictures show the building.
The sixth picture is the model of the candy Chuck after assembly.
Figure 1 shows the PS2 mouse I picked up. 99 cents(
Catch a few actually).
I found all kinds of neat parts in it.
Figure 2 shows the front and back of the mechanical encoder wheel.
Two to nine pictures show the buildings and pits I fell.
This is an ongoing work.
I\'m going to investigate these devices.
So far, the spindle is my curse.
More work is needed
But I have succeeded.
Figure 1 shows some initial test parts and manual work.
Figure 2 shows my simple soft shaft bracket.
Good job.
The picture three to five shows some details on my new spindle stand and is also working on it.
To avoid this, it was almost decided to make a CNC lathe.
One to four pictures show the shaft assembly fixed to the base and column.
Very simple here.
The first picture reminds me of my Z axis disaster.
Figure 2 lets add a barrier strip to both encoders.
Only one is shown here.
Figure 3 shows the x-axis Motor/limit switch hook ups.
Use a zip tie to secure the isolation band.
Figure 4 shows the y-axis Motor/limit switch hook ups.
Keep the y-axis motor stationary.
Figure 5 shows the z-axis Motor/limit switch hook ups.
Details of the x-axis encoder barrier strip.
Details of the encoder barrier strip on the y axis.
Pictures 8 to 10 show the connection between the micro-controller and the breadboard.
Figure 1 to 3 shows the wire management of the micro-controller to the H-bridge.
And the motor/limit switch of the H bridge.
Pictures 4 and 5 show the hooks of Vdd (positive+)
On the limit switch.
Figure 6 shows the motor to the H bridge hook.
Figure 7 shows the normal open circuit wires of the limit switch.
This requires some debugging to be correct.
I marked the wire with tape (yellow arrows)
Once I know what it is.
Pic eight is a micro controller connection and it needs some more debugging to be correct.
I opened the candy Chuck on my mini car bed.
And used for some manual test cutting.
The picture above shows some drilled orange candy and a cherry \"rune\" stone.
Pic one is the security shield I added on an adjustable arm.
Figure 2 is a screenshot of my Pbasic instructables mdi cnc test terminal.
Figure 3 is over now. . . . .
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