Well, here it is! This is the final part 3 of a heavily edited shorter version of the original build series which ran for 24 episodes. I’ve also added timestamps so you can come back and find certain sections. At the end of the video I explain how to download the CAD for free. A written guide is below.
Free CAD download (Fusion 360 format):
1. Link to the mycncuk forum post (#1) is below.
http://www.mycncuk.com/threads/15107-My-CNC-router-MK4-F360-CAD-files?p=129001
2. Click the link then scroll part way down post #1 and there is an optional link to the British Red Cross Ukraine to help with humanitarian efforts. They have a Paypal option so it is nice and easy, should you wish to donate.
3. Then scroll down to the bottom of post #1 and there is a link to the free download file itself in F360 format.
This CAD is completely free, but if you want to support the channel I’m experimenting with a “Thanks” button which if I’ve done it right (!) should appear someone around the video which I think allows you to send over a few dollars to help the workshop funds. Again, no obligation at all, just enjoy the videos.
You don’t need to be a forum member to download it, but you may wish to join and access the wealth of information from all the experienced builders on there. There is also a build log section which is well worth a browse. Then when you are ready start a thread, talk about your project, then ask all the questions you want !
TIMESTAMPS
0:00 – Introduction to Mk4
0:18 – Mk3 CNC machine teardown
0:44 – BED: Modifying the bed
1:52 – BED: Building up the sides
3:10 – BED: Adding the crossbeams, end plates, and cable trays
5:45 – BED: Epoxy levelling the X axis – PROBLEMS !
7:34 – BED: Epoxy levelling the X axis – SUCCESS !
9:49 – BED: How flat are the 20mm Hiwin Linear Rails ?
11:53 – BED: Lateral alignment of the X axis linear rails
12:50 – BED: Checking vertical alignment of the rails with a precision level
14:15 – GANTRY: Installing the moving gantry
18:46 – GANTRY: Epoxy levelling the Y axis – SUCCESS ! (2 jugs method)
22:54 – GANTRY: Lateral alignment of the 20m linear rails
24:25 – Y & Z AXIS: Installation, pre-load adjustment, MOVEMENT !
27:16 – Cable trays and drag chains
29:20 – Z AXIS fitting the steppers
30:53 – FIRST FULL MOTION CHECK !
32:31 – Proximity sensors
34:44 – Testing the sensors for home repeatability
35:58 – Spindle power cable re-fit (longer cable), basic electrical checks
40:52 – Spindle installation (1.5kW Chinese Water Cooled ER11 collet)
42:02 – Spindle to VFD connections (motor UVW, spindle & shield ground)
42:28 – Spindle run up testing 0 – 24,000 rpm
42:57 – Overview panning shots of FINISHED machine (mechanically) !
43:49 – Water temp sensor (spindle cooling system)
44:27 – Skimming the bed (get the surface in plane with the rails)
44:47 – Belt safety shields
45:21 – Squaring / homing the X axis with dual stepper motors
46:48 – Tramming the spindle (make it perpendicular to the bed surface)
49:24 – MACHINE FINISHED !
49:37 – Basic TEST CUTS, what can it do !
51:44 – How to get the free CAD download (Fusion 360 format)
NOTES:
This is probably not a first time machine and you will need a lathe and ideally a milling machine or someone with these tools to help you make the custom parts.
I don’t have a cutting list, parts list, drawings, etc. but the motors, screws, rails are all standard sizes for CNC machines.
Provided as-is and I can’t support modifications. Also since it was imported into F360 from another package there is no design history to roll back. Use it for ideas, inspiration, or incorporate some or all of the parts it into your DIY machine. Or just have a look around and see how I did it! I think it took about 18 months of on/off design, multiple iterations and dead ends.
Good luck with your project !
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