The NEW Build Your Own Arcade Controls
Main => Project Announcements => Topic started by: djhobin69 on March 06, 2018, 07:09:25 am
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Hi Ladies/Gents just a quick intro from myself
Im Andy from Manchester UK, I have spent the last few months build myself a cnc machine for wood and perspex cutting (MPCNC), i built this so i can start making my own aracde
machines, the machine is not very big so I will be mostly building bar top's. Anyway here is my first attempt,
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366242;image)
live not sanding anything yet but i will do this once the wood glue is dry
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You need more rigidity in your CNC frame. In the meantime you can slow down your feed rate. Those lines in the edges look like your passes are not perfectly tracking. You should not have to sand the edges at all. Your cuts should not look so rough. Post some pics of your machine. Maybe I can help.
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366249;image)
The edges should look more like this. Look at the button hole and joystick cutouts. I couldn't find a pic before I put the T molding on.
These are not even that great. I was squeezing the last smidge of life out of a cheap end mill.
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hi mike thanks for the advice, i think its the router bit thats the issue when i built it i only have one from an actault router not a cnc i have some cnc router bits on order at the moment so im hoping they improve the cuts
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I hope it is that simple. That banding looks like a repeatability issue. Either the frame is not rigid enough, or you are pushing the router too hard, or both. Some pics of the CNC machine would be helpful in sorting that out.
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ill get some pics when i get home your probably correct about it being rigid but not sure how i would stiffen it up
thanks
Andy
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Here are some generic MPCNC pics.
(http://www.reprap.org/mediawiki/images/thumb/5/5f/MPCNC.jpg/729px-MPCNC.jpg)
(http://www.reprap.org/mediawiki/images/thumb/2/28/Mid5.jpg/800px-Mid5.jpg)
There's a ton of related info at the V1 Engineering forums run by Ryan, the MPCNC designer.
https://www.v1engineering.com/forum/ (https://www.v1engineering.com/forum/)
Scott
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Ugh. Unsupported rails. That will be good for extremely light duty at best. Slow feeds are your best bet. That whole structure will sag in the middle. There is not much you can do about that. That frame looks like it is made for a non contact tool like a laser.
The first CNC machine I built had unsupported rails. Slow feeds yielded good results. My machine was much heavier than this one though. Steel pipes and lead screws.
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Ugh. Unsupported rails. That will be good for extremely light duty at best. Slow feeds are your best bet. That whole structure will sag in the middle.
I agree that a slow feed rate is your friend, but cutting MDF shouldn't be a problem.
The MPCNC can mill aluminum with the right combination of bit, spindle, and feed rate.
! No longer available (http://www.youtube.com/watch?v=WxN7gmFyrEg#)
https://www.youtube.com/watch?v=WxN7gmFyrEg (https://www.youtube.com/watch?v=WxN7gmFyrEg)
! No longer available (http://www.youtube.com/watch?v=y90T1P1F75g#)
https://www.youtube.com/watch?v=y90T1P1F75g (https://www.youtube.com/watch?v=y90T1P1F75g)
The designer recommends a typical 2' x 2' working area, with tube supports for any axis over 4' or go with the newer LowRider design for a large working area.
One technique mentioned on the MPCNC forums is to rotate the tubing 180 degrees from time to time so any sag induced by gravity is then reversed by gravity. ;D
If that fails, replacement conduit is relatively cheap.
All things considered, it looks like a great way to get started with CNCs for under $500.
Scott
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For 500 bucks it is worth a shot. It seems to be more capable than it looks. The OP probably needs to slow down and use an end mill instead of a router bit.
Thanks for the info PL1.
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just got a new quite spindle so i can now cut at any time of the night which is cool , plus cuts are getting neater
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366280;image)
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Now its time to use a better design for your bartop. This one is so straight and hooky it looks like someone created it without descent tools. There are some really nice ones out there which scream for a cnc cut...
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Here are some generic MPCNC pics.
(http://www.reprap.org/mediawiki/images/thumb/5/5f/MPCNC.jpg/729px-MPCNC.jpg)
(http://www.reprap.org/mediawiki/images/thumb/2/28/Mid5.jpg/800px-Mid5.jpg)
There's a ton of related info at the V1 Engineering forums run by Ryan, the MPCNC designer.
https://www.v1engineering.com/forum/ (https://www.v1engineering.com/forum/)
Scott
I’m actually going to build one of those. I have all the parts to it and just need to assemble.
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Wow, it's borderline cheaper to cobble your own CNC machine and print out one of these bartops versus buying one from Mr. We and his fabulous garage storefront.
:o
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(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366369;image)
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366371;image)
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366373;image)
the finished article this is running an older 500 in 1 elf board
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this is the new project ive been working on for a 60 in 1 board
(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=149895.0;attach=366589;image)