Meet the eShapeoko #344

BellyUpFish
Posts: 174
Joined: Mon Jan 12, 2015 9:19 am

Re: Meet the eShapeoko #344

Post by BellyUpFish » Mon Jul 27, 2015 3:55 pm

tiltit wrote:
Here are some pics.
P7263216.JPG
P7263217.JPG
P7263218.JPG
I am having so much fun with this machine, thank you cvoinescu for making it easily available in Europe.
What are your speeds/feeds for cutting aluminum?

tiltit
Posts: 14
Joined: Fri May 15, 2015 7:55 pm

Re: Meet the eShapeoko #344

Post by tiltit » Mon Jul 27, 2015 9:01 pm

What are your speeds/feeds for cutting aluminum?
I have tried a few. I did start with 250mm/min feed and 0.1 mm cut depth at 16K rpm, that worked well. I then cut a piece on Sunday so I had to keep noise down so I tried 200mm/min 0.1 cut and 8K rpm, that worked too but my spindle did struggle from time to time. Today I cut at 300 mm/min, 0.2mm cut depth and 20K rpm, that also worked good. I used a 2mm two flute, pretty worn end mill.
I do find aluminium chips quite nasty though, I think that I will only mill it on special occasions.

tiltit
Posts: 14
Joined: Fri May 15, 2015 7:55 pm

Re: Meet the eShapeoko #344

Post by tiltit » Mon Jul 27, 2015 9:19 pm

Forgot to mention the alloy. It's AlMg1 or 5005. That's the only one my local metal supplier has. I find it very soft.

tiltit
Posts: 14
Joined: Fri May 15, 2015 7:55 pm

Re: Meet the eShapeoko #344

Post by tiltit » Sun May 01, 2016 8:07 pm

Hi again,
it's been a long time that I haven't added anything to this log. I am currently building a new box to hold the electronics and I wanted a new circuit board for GRBL. No more Arduino and shield with pin headers connections. So I used my e-Shapeoko to mill out a new board.
To design the board I used Kicad, then I generated the gcode with Flatcam and finaly send it to the machine with bCNC.
MillyGRBL_Front_assembly.JPG
MillyGRBL_Front_assembly.JPG (142.08 KiB) Viewed 1759 times
There are still some bodges, but it is acceptable. The whole milling process took 6 hours.
MillyGRBL_Back_assembly.JPG
MillyGRBL_Back_assembly.JPG (132.35 KiB) Viewed 1759 times
And some failures.
MillyGRBL_Fail.JPG
MillyGRBL_Fail.JPG (149.33 KiB) Viewed 1759 times
As You can see in the last picture I did struggle quite a lot to get the final result and I had quite a few failures.

tiltit
Posts: 14
Joined: Fri May 15, 2015 7:55 pm

Re: Meet the eShapeoko #344

Post by tiltit » Sun May 01, 2016 8:10 pm

Here is a detail from the freshly milled board.
MillyGRBL_detail.JPG
MillyGRBL_detail.JPG (427.49 KiB) Viewed 1758 times

CalebPeters
Posts: 109
Joined: Sun Nov 10, 2013 12:20 am
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Re: Meet the eShapeoko #344

Post by CalebPeters » Sun May 01, 2016 10:03 pm

That looks very impressive! I bet it will be well worth your effort.
Shapeoko 2 #3164 : GRBL, NEMA 23 motors, 350W Spindle, Limit/home switches, Drag chain, X-Carve Upgrade.
DIY-Oko 3 #-1 : LinuxCNC, PC-450 with Super-Pid, Hall Effect Limit/home switches.

tiltit
Posts: 14
Joined: Fri May 15, 2015 7:55 pm

Re: Meet the eShapeoko #344

Post by tiltit » Mon May 30, 2016 9:27 pm

I now have installed all the electronics into a wooden box with an aluminum base. It still isn't perfect but in any case it's better than before. And it sure took me a long time...
grbl_box.JPG
grbl_box.JPG (139.04 KiB) Viewed 1645 times
grblBox_topview.JPG
grblBox_topview.JPG (188.49 KiB) Viewed 1645 times
I find that cable management is much harder than it looks. And wiring mains is really quite scary stuff. I sure hope I got it right.

zerblatt007
Posts: 196
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Location: Bergen, Norway
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Re: Meet the eShapeoko #344

Post by zerblatt007 » Tue May 31, 2016 12:32 pm

Your setup seem quite tidy and nice to me.
Mains are not that scary if you separate it from lower voltage cabling and mark it well. This will also reduce noise and problems related to EMI/RF as your controller is not shielded.
What you could do to make it even more tidy is wrap the mains wires in some spiral wrap like these: http://www.cableorganizer.com/spiral-wrap/
Shapeoko #958: Dual-Y drive, Double-X, Belt on outside, 1m Y-Axis, Acme Z, Opened up and boxed in. Kress 1050 Spindle.

cvoinescu
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Location: Camberley, UK
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Re: Meet the eShapeoko #344

Post by cvoinescu » Tue May 31, 2016 12:51 pm

Your wiring looks good to me too.

One little nitpick: it is a good idea to have double insulation on all mains wires where they can go near parts that can conduct electricity into a human. You can achieve that by securing the mains wires out of the way, e.g. with zip ties, where, even if the insulation somehow fails or a connector comes off, they can't touch a low-voltage circuit; or by adding a sleeve of some sort. I'm pretty sure the spiral wrap isn't rated as insulation, so you would not be passing any certifications by using it, but it seems enough to me.

In other words, spend a minute thinking of all possible things that can fail (insulation gets stripped by accident; solder joint comes undone; switch pops out of its hole; and so on), and make sure one single fault can't put the user in danger (blown fuse okay, starting fire not okay, mains voltage through person definitely not okay).

Edit: I've re-read my last paragraph and it sounds a bit scary. It's not. A few zip ties to hold the mains wires together go a long way -- if any one pops out of its connector, it's still zip-tied to its neighbor, so it can't wander off too far.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

tiltit
Posts: 14
Joined: Fri May 15, 2015 7:55 pm

Re: Meet the eShapeoko #344

Post by tiltit » Sat Jun 04, 2016 1:51 pm

Thanks for the advise with the spiral wrap. I thing I may just do that, it can't hurt to have an extra layer of insulation. One thing that I am unsure about is earth. I have the bottom aluminum base tied to it, and so is GND. I believe that the electrical installation in my flat is pretty good, but I wonder what can happen if it's not so. I have seen flats in Germany where where earth was actually live and got some strongish tingling just by touching a computer case. Does any one know if MeanWell power supplies have any fuses or should I add one?

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