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  1. #1
    Join Date
    Apr 2009
    Posts
    165

    Talking My ghetto table top MDF build!!

    So I have been lurking on here from a few months now. Unlike most of the guys on this great forum I chose to start my build before actually doing any research in to what I should do! I just dove in head first and started buying stuff at the local Hardware store. After waisting 100 bucks or so on failed linear guide solutions I finally bought some parts that actually work. And now finally I have a fairly accurate machine. It still needs some tweaking, the bearing blocks are still just mdf and I need to enclose my controller board. It at least works for its intended purpose, drilling holes for a diy microphone capsule. It is also busy building better parts for itself! I am attaching a video of it drilling some holes. let me know what you all think. And trust me, I know it could be much better. In fact I'm already looking out for some aluminium to upgrade the z axis. Thanks for looking!!!!
    Eric

  2. #2
    Join Date
    Jun 2004
    Posts
    35
    All in all it doesnt look like a bad build. As long as it does what you want.
    Is the voice in my head bothering you?

  3. #3
    Join Date
    Apr 2009
    Posts
    165
    Thanks,

    I'm actually pretty happy with it so far. I just see what some of the guys on here are building! Very impressive stuff. I wish I had the space and tools to work with steal and aluminium!

    Eric

  4. #4
    Join Date
    May 2007
    Posts
    380
    Nice first build. I would recommend replacing the Dremel tool with a 1/4" trim router. Even the one Harbor Freight sells. The added power and wider selection of 1/4" shanked bits is well worth it. (That's what I did)

    John

  5. #5
    Join Date
    Jan 2006
    Posts
    628
    Great work. That's one of the cool things about CNC projects - solving problems and getting the job done on a modest budget. It's a home run. There's always room for improvement, but now you have a base (knowledge and physical) to build on.

    Steve

  6. #6
    Join Date
    Apr 2009
    Posts
    165
    Thanks for the kind words. Its been a long road but a bunch of fun!! Its very satisfying seeing all of your hard work come to fruition.

  7. #7
    Join Date
    Oct 2005
    Posts
    2392
    Good going! Umm, where's the pictures?

  8. #8
    Join Date
    Aug 2009
    Posts
    392
    Quote Originally Posted by RomanLini View Post
    Good going! Umm, where's the pictures?
    I second that

  9. #9
    Join Date
    Apr 2009
    Posts
    165
    Is the video working???

    I need to take some pictures and get them posted. I will do it tonight.

    Eric

  10. #10
    Join Date
    Oct 2005
    Posts
    2392
    Quote Originally Posted by tskguy View Post
    Is the video working???
    ...
    Not for me.

  11. #11
    Join Date
    Mar 2010
    Posts
    0

    What components

    Would you mind posting what components your used, and where you got them? For instance, which controller board is that? Also, where did you get the rails?

    Looks good. Thanks,

    John

  12. #12
    Join Date
    Apr 2009
    Posts
    165
    So looks the video works for some of you but not others. Interesting.
    As for components..The fram is 100% 3/4 inch MDF. The motors I orderd from All Electronics. They are cheap!! only 9 bucks a piece. They work great though.
    The lead screws are 16tpi and I bought them from a guy on ebay. They are just ok, that is something I would love to eventually upgrade. The board I also bought on ebay from Lightobject model TB6560T3V1. It works very well and was pretty easy to setup. Im using the 1/16 micro stepping and the resolution seems to be very good. For power Im just using a 12v supply that I converted from a PC. I had planned on buying a 24v but 12 seems just fine for what Im doing. I used linear rail on the x table(ebay) not sure on the brand. And 12mm linear rod from Mcmaster carr and 12mm bearings from ebay. The 12mm works very well on the z axis but has a little flex on the y axis. If I had done my homework before buying I would have gone with 20mm rods and bearings on the y axis to reduce flex. Oh well something to upgrade latter! For the most part it works great. Fun learning experience. I do plan on using most of these components on an all aluminum buid someday in the near future. I just need to get a drill press and some taps before I go down that road!
    Eric

  13. #13
    Join Date
    Mar 2010
    Posts
    0
    That was actually the board that I'm considering using. Did you try it on full steps by any chance? The reason I'm wondering is that I am making an application for speed, but accuracy isn't as important.

    Also, I tried to find the motors that you are using on all electronics. It looks like there are 2 $9.00 ones:

    http://www.allelectronics.com/make-a...R-MOTOR/1.html
    http://www.allelectronics.com/make-a...STEPPER/1.html

    and one $8.00:

    http://www.allelectronics.com/make-a...R-MOTOR/1.html

    that look like the one you used. However, I can't find voltage or current ratings for any of them. Do you know the voltage and current rating for yours? Which one was it?

    Thanks again.

  14. #14
    Join Date
    Mar 2010
    Posts
    0
    Oh, one other question. For the lightobject board, are the possible current outputs: 2 amps, 1 amp, .5 amps, or 3 amps, 1.5 amps, and .75 amps?

    Thanks again.

  15. #15
    Join Date
    Mar 2010
    Posts
    0
    Found a little info on each of these:

    Datasheet for 23KM-K255U http://www.interinar.com/public_docs/23KM-K255U.pdf Allelectronics link: http://www.allelectronics.com/make-a...R-MOTOR/1.html $8.00

    Info for STP 58D3004 http://www.mendingthings.com/?p=68 "1.8 dgree, 1.2V and 2.5 Amps and .48 Ohms." Allelectronics link: http://www.allelectronics.com/make-a...STEPPER/1.html $9.00

    Just a little more info for 23KM-K246-01V http://www.arduino.cc/cgi-bin/yabb2/...m=1259987287/4 Allelectronics link: http://www.allelectronics.com/make-a...R-MOTOR/1.html $9.00

  16. #16
    Join Date
    Apr 2009
    Posts
    165
    The motor I bought is the first link you posted...It works well but I did have an issue when I recieved them. I had to crack them open and re-solder the connection to the external connector. Not a big deal but I was a little miffed becouse they didnt work out of the box. But for 9 bucks a little time and a multi meter nd all has been good ever sence. I didnt try the full stepping on the board. I have read it isnt a good idea. From what I understand micro stepping is more for smoothing out things not really to give you more resolution. But I could be wrong Im a bit of a newbie.

    Eric

  17. #17
    Join Date
    Aug 2009
    Posts
    392
    Quote Originally Posted by tskguy View Post
    The motor I bought is the first link you posted...It works well but I did have an issue when I recieved them. I had to crack them open and re-solder the connection to the external connector. Not a big deal but I was a little miffed becouse they didnt work out of the box. But for 9 bucks a little time and a multi meter nd all has been good ever sence. I didnt try the full stepping on the board. I have read it isnt a good idea. From what I understand micro stepping is more for smoothing out things not really to give you more resolution. But I could be wrong Im a bit of a newbie.

    Eric
    Different stepping modes, as mentioned, are meant to smooth things out more than to give extra resolution. It's used to eliminate resonant frequencies the best you can. Even with a smaller step mode, you can achieve the same speeds, assuming that your computer can keep up.

  18. #18
    Join Date
    Mar 2010
    Posts
    0
    Quote Originally Posted by tskguy View Post
    The motor I bought is the first link you posted...It works well but I did have an issue when I recieved them. I had to crack them open and re-solder the connection to the external connector. Not a big deal but I was a little miffed becouse they didnt work out of the box. But for 9 bucks a little time and a multi meter nd all has been good ever sence. I didnt try the full stepping on the board. I have read it isnt a good idea. From what I understand micro stepping is more for smoothing out things not really to give you more resolution. But I could be wrong Im a bit of a newbie.

    Eric
    Sorry, I posted twice with a different order. You got the:
    http://www.allelectronics.com/make-a...R-MOTOR/1.html ?

    What current setting did you use on your lightobject board to go with it?

    Thanks again. this is great info.

  19. #19
    Join Date
    Apr 2009
    Posts
    165

  20. #20
    Join Date
    Apr 2005
    Posts
    1
    Hello tskguy,
    I bought a board model TB6560T3V1 but I have not an user manual or a wiring diagram; can you help me?
    many thanks.

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