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Netjams
12-24-2006, 04:50 PM
I wanted to post a build log but I didn't have a camera to share pictures and all the plans were just in my head. After using it for the last 6 months or so I have learned a lot about the weak design but have been able to use it knowing what I can and can't do.
To begin I didn't have any tools other then a set of Ridgid cordless power tools (a drill, sawsall, and skillsaw) oh and a $20 trim router from Harbor freight last an old $10 skill saw from the flemarket. I knew to pull this off I would need a table saw, drill press and router table so I made all those things by building jigs that use the Ridgid tools. For example an old dresser made a great table saw with the old $10 skillsaw mounted underneath and using the dresser top as the table and screwing a fence in the position I needed. On both X rails (the length rails) and the Y rail (side to side) are just 3/4" mdf cut in 6" strips with a 1/4"X1/4" slot cut in the side ends for the 1/2" precision ground steel rods to lay in.

The table size is 48"X24" with about 5" of Z travel (depending on how I place the router and what bit I use). I'm using 3 Geko 201's powered by a 50 volt transformer I got out of an old high power audio amp (about 10 amps?) driving 1 nema 34 604oz for the x and 2 nema 34 ???Oz for the x and y, the 5 volt is still on a breadboard. I'm using 1/2" rolled ball screws on all x, y and z but the end connected to the couplers is ground on a grinder freehand and not so straight.

The machine performs very well, it will run 170 ipm but cutting around 80 or so is as fast as you would want on most any wood. It has good repeatability and a resolution of 1/10,000" but the design really won't allow that close of work with any accuracy.

Now I need to figure out the image part. I got a camera today and have taken some pics of the machine and some of the work I have done on it.
I will post pics shortly :)

Netjams
12-24-2006, 05:10 PM
Ok I think this will work.

http://www.cnczone.com/forums/attachment.php?attachmentid=27889&stc=1&d=1166998101
http://www.cnczone.com/forums/attachment.php?attachmentid=27890&stc=1&d=1166998101
http://www.cnczone.com/forums/attachment.php?attachmentid=27891&stc=1&d=1166998101
http://www.cnczone.com/forums/attachment.php?attachmentid=27892&stc=1&d=1166998101
http://www.cnczone.com/forums/attachment.php?attachmentid=27893&stc=1&d=1166998101
http://www.cnczone.com/forums/attachment.php?attachmentid=27894&stc=1&d=1166998101

Netjams
12-24-2006, 05:25 PM
Here is a short vidio of it running.

CNC vidio (http://67.11.146.0/MVI_0059.avi)

Netjams
12-24-2006, 05:51 PM
Some pictures of some of the stuff I made with this machine.

http://www.cnczone.com/forums/attachment.php?attachmentid=27895&stc=1&d=1167000543
http://www.cnczone.com/forums/attachment.php?attachmentid=27896&stc=1&d=1167000543
http://www.cnczone.com/forums/attachment.php?attachmentid=27897&stc=1&d=1167000543
http://www.cnczone.com/forums/attachment.php?attachmentid=27898&stc=1&d=1167000543
http://www.cnczone.com/forums/attachment.php?attachmentid=27899&stc=1&d=1167000543

InventorJohn
12-24-2006, 06:04 PM
I like it! Very cool router! Gives me ideas on how to proceed with my gantry. Its amazing what you can build with just wood. I also seen your mention of harbor frieght, Its a great place. My inlaw keeps all the sale ads in a 3 ring notebook, and they honor all their old ads.

Netjams
12-24-2006, 06:26 PM
I'm glad you like it and hope it inspires others to go forard with making their own.

bigz1
12-25-2006, 07:16 PM
I like the dual rails on the x axis. Have you got a closeup of the bearings?

Could you also tell me how much your router bit moves by racking the gantry?

Liam

Netjams
12-25-2006, 07:49 PM
Could you also tell me how much your router bit moves by racking the gantry?

I'm not sure what your asking about racking?

I will post some close ups of the bearing setups I used.

Netjams
12-25-2006, 08:07 PM
This is a close up of the bearings in the top rail of X
http://www.cnczone.com/forums/attachment.php?attachmentid=27948&stc=1&d=1167095167

planekrazie
12-25-2006, 08:30 PM
Nice.. The bearings are almost like Train Wheels. Where did you find them?
Steve

Netjams
12-25-2006, 09:07 PM
The bearings were surplus from my local electronics store, I think they were use for guides in old radios. The have very little runout and worked great for this application. I think I still have a hundred of them (need to look), at the time they had them for sale 5 cents each so I purchase 200 of them.

bigz1
12-25-2006, 09:09 PM
Thanks for the closeup netjams. Nice simple idea. I take it their is some small position adjustment available?

By racking I meant how much will the router bit move from it intended posistion by pushing forcibly on one side of the gantry(router being as close to this side as possible).

planekrazie
12-25-2006, 09:26 PM
Would wou be willing to part with a few? I am in the processes of rebuilding my CNC hotwire foam cutter.
Steve


The bearings were surplus from my local electronics store, I think they were use for guides in old radios. The have very little runout and worked great for this application. I think I still have a hundred of them (need to look), at the time they had them for sale 5 cents each so I purchase 200 of them.

Netjams
12-25-2006, 09:49 PM
Bigz1 there is a small movement by doing that, I added cables underneeth to elemiate it but took it off because it slowed the machine down too much.


planekrazie,

I will search to see how many I have left and PM you about it :)

Netjams
12-25-2006, 09:51 PM
I take it their is some small position adjustment available?

Yes that is done by adjusting the nuts on the bolts, causing the bearings to get closer or further apart. I worked better then I expected it would.

planekrazie
12-25-2006, 09:52 PM
Awesome.
Steve



Bigz1 there is a small movement by doing that, I added cables underneeth to elemiate it but took it off because it slowed the machine down too much.


planekrazie,

I will search to see how many I have left and PM you about it :)

bigz1
12-25-2006, 10:20 PM
I was just curious I am getting about .6mm on mine. Its dual rail twin stepper arrangement. I currently have my screws quite high up and was thinking of lowering them. I am also using skate bearings.

Just realised what you have done with the bearing on the zy arrangement. Brillant idea.:cheers: I may copy it at a future date. Appreciate a few more photos of the lower part front and back of z axis.

gmfoster
12-26-2006, 10:47 AM
That is a pretty impressie machine and you have also produced out some pretty impressive work with it..

Congratulations on a job well done!

Garry

Bloy2004
12-26-2006, 11:39 AM
Very nice!.... considering the tools you had (or lack of).
You show real ingenuity!
Heh! I'd sure like to see a picture of that Dresser...er table saw!

John (bloy)

Netjams
12-26-2006, 07:39 PM
Just realised what you have done with the bearing on the zy arrangement. Brillant idea.

Thanks. I thaught it was a good idea too, it sure added some cut area to x :)




Appreciate a few more photos of the lower part front and back of z axis.

I hope this shows what you want.
The wire arount the nuts makes it stronger, I need to take some time out from playing with it and make a thin plate that sits between Y and Z so I dont have to have that wire there.

http://cnczone.com/forums/attachment.php?attachmentid=27999&stc=1&d=1167179315
http://cnczone.com/forums/attachment.php?attachmentid=28000&stc=1&d=1167179315



Heh! I'd sure like to see a picture of that Dresser...er table saw!

Ha.. I'm glad I didn't toss it yet. I have sence then purchased a little 10" table saw and the dressor is out in the weather now.

http://cnczone.com/forums/attachment.php?attachmentid=28001&stc=1&d=1167179315


The machine was very easy to build. All the rails are 6" so starting with 3 half sheets of 3/4" mdf I cut 4 6" strips from the first one and the second was the table and the third was the ends cut with the skillsaw. The trick was figuring where to drill the holes, so that is where the leftover was used :)

Netjams
12-26-2006, 07:41 PM
Ha. I see just puting the images as attachments is enough, I don't have to put the image link.. My bad :withstupi


I did another vidio.. I'm engraving PINK FLOYD in glass for my son.

Engraving glass vidio (http://67.11.146.0/glass.avi)

bigz1
12-26-2006, 09:06 PM
Thanks for the pics. Most appreciated.

I was thinking the same concerning the thin plate to beef it up.