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  #11  
Old 10-15-2013, 12:09 AM
o7oBaseMetal o7oBaseMetal is offline
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I am especially interested in the aspect of putting the "brains" into the machine, connecting them to the motors and mechanical stuff, and calibration of it all. My electromechanical skills are limited...
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  #12  
Old 10-15-2013, 12:32 PM
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1. Getting the gantry ready for a few braces to stiffen it up.

2. Braces added to the gantry.

3. Y axis rail carrier on top of the gantry

4. Center pivot to align the rails to the carrier and a few struts added

5. starting to make the y axis rails
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  #13  
Old 10-15-2013, 12:55 PM
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1. Plates for the rails to be welded onto. They are bolted on in case I have to shim the rails into alignment.

2. Rail being welded to the plates

3. Both rails intalled on the frame

4. Y axis frame and rails on the carrier.

5. The whole assembly so far with a little paint.

Thats as far as I was able to get last weekend. Some of that stuff is slow going and I just can't seem to make any time with it.
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  #14  
Old 12-23-2015, 10:33 AM
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Ii finally have room for another iron on the fire. I am back on this project working on the heatsink for the drivers. I used an endmill for the first time to cut a piece off of the heatsink so I can mount it. I used my drill press so it is a little sloppy but it will work. I am going to mount all three drivers on the same sink. Without a brake I had to use my seamers to make the shroud. It is a little wavy but it will work.
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  #15  
Old 12-23-2015, 04:23 PM
kbs2244 kbs2244 is offline
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Default x-y printer

Not to hi-jack, but, on a some what related theme.

Years ago the were drafting drawing flat bed printers.
They were x/y only (no "Z" for depth.)
They are as antique as buggy whips now days.

I have seen them sometimes on surplus auctions.
Has anyone ever converted one of them to a CNC machine?
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  #16  
Old 12-23-2015, 06:20 PM
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Quote:
Originally Posted by kbs2244 View Post
Not to hi-jack, but, on a some what related theme.

Years ago the were drafting drawing flat bed printers.
They were x/y only (no "Z" for depth.)
They are as antique as buggy whips now days.

I have seen them sometimes on surplus auctions.
Has anyone ever converted one of them to a CNC machine?
I'm sure some one has. It would have to be made pretty stiff though. You would have to play it by ear to see if it is worth useing or starting from scratch and maybe use some of the components
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  #17  
Old 12-24-2015, 08:38 PM
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DeepSeaDynamo DeepSeaDynamo is offline
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Quote:
Originally Posted by kbs2244 View Post
Not to hi-jack, but, on a some what related theme.

Years ago the were drafting drawing flat bed printers.
They were x/y only (no "Z" for depth.)
They are as antique as buggy whips now days.

I have seen them sometimes on surplus auctions.
Has anyone ever converted one of them to a CNC machine?
I'd be concerned with how much side load whatever controls the movement would be able to provide as well. May work for a plasma but not so much for a router. This is of course just an assumption, they did used to overbuild things a lot more then the do now.
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  #18  
Old 12-25-2015, 05:18 PM
kbs2244 kbs2244 is offline
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Default drafting printer

I wasn't thinking so much about the mechanical strength as the positioning logic.
I think most of us are good enough at mechanical engineering concepts to be able to strengthen something up.
But, like me, we may be lacking on the programming side.

I may do a "make" search.
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  #19  
Old 12-25-2015, 10:04 PM
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For positioning logic and simple machine, check out NYC CNC channel on YouTube. They put together a neat but down sized completely shop built x-y machine......
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  #20  
Old 12-25-2015, 11:44 PM
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LKeithR LKeithR is offline
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For those of you who are interested MechMate has a full set of plans for a CNC router table. There are detailed drawings in PDF format as well as a full set of dxf files for all the required profiles. They also include tables for calibration of the stepper motors...all in all a very complete set of info.

When I acquired the files several years ago they came from the original developer in England and were a free download for anyone who intended to use them for themselves and not for resale. Since that time someone in Arkansas has acquired the rights to everything and is charging for access to the files.

At the time I acquired the files there was no restriction on sharing them--so long as no money changed hands--so I see no reason why I can't share them with my friends here.

I've attached the first PDF file to give you an idea of what's involved...
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