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  1. #121
    Registered Skyfire's Avatar
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    Quote Originally Posted by LeeWay View Post
    Looking very cool.
    It looks pretty sleek.
    What color or colors have you chosen to do it in?

    Not that it makes a lot of difference. It will look sharp in any color and work the same as well.
    Hi Lee, Welcome back :cheer~

    Yes. I chose the colorway several days ago. I want to use Orange and Dark Gray as the major colors for my machines. I have ordered the paint sample now. Double component resin paint type. I had used such paint before and should be best for machines.

    I will do the putty works very soon also and then I guess I will receive the paints in 3-4 days so I can paint the machine.

    Thank you again. And yes, I'm sure the machine will look not bad.

    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  2. #122
    Gold Member LeeWay's Avatar
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    I never left. Been here the whole time.

    Color choices sound excellent. Look forward to seeing it dressed up.

    Lee


  3. #123
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    Quote Originally Posted by LeeWay View Post
    Come to think of it, it doesn't look too bad in iron oxide.

    For what it is worth, I did my mill in gloss black. It looked very nice to start with, but just like on a car, it shows everything. Chips stand out like diamonds. Sparkles and glitters and lets me know I haven't been doing very good housekeeping.
    Yes man, I can imagin the picture as you described. Trust me, My bigger CNC I used to mill the casting iron parts looks much much more worse than yours now..

    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  4. #124
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    Quote Originally Posted by LeeWay View Post
    I never left. Been here the whole time.

    Color choices sound excellent. Look forward to seeing it dressed up.
    I almost want to paint it right now... but have to adjust the accuracy firstly, and putty works may take 1-2 day to wait it dry, and second putty work..

    But I'm sure we will see the coated machine within 4-5 days!

    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  5. #125
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    Fantastic



  6. #126
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    Quote Originally Posted by hesham morsy View Post
    Fantastic
    Thanks man. Welcome any inputs here

    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


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    Hi guys. I have done many small works today.

    Firstly I planned to install the motors firstly to make the axis move convinient because the motors have the small handwheels behind. To install the motor in the right position, I milled a smll locating coupler between the ballscrew end and the motor bracket. It's a simple AL part I machined with CNC control.





    Fit in very well:


    Locating the bracket:


    After locating the bracket I could drill the screw holes at the right postion so the stepper motors can drive the ballscrews more smooth with shaft couplers.

    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  8. #128
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    Next was the spindle motor mount. I had planned to use the steel board as standard but has no fitfull material in hand. So I made this one with aluminium too.

    Still simple CNC milling firstly:


    One side finished:


    All finsihed. seem nice


    installed to the head and make the spindle motor having some adjustable distance:


    After installing the spindle motor, I added the timing pulley to the shaft. This was an easy step also.


    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  9. #129
    Gold Member handlewanker's Avatar
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    Hi skyfire, I think your machine would look good in red, not bright pillar box red but a deep red like old blood...LOL....maybe with a slight hint of Maroon in it.

    Just looked at the 4th photo in post #128 and the red colour looks quite good.

    BTW, I have been puzzling over something.......the X axis rails stick out in front of the slide....is this because the rails were too long and you didn't want to cut them short?

    Also I see you are using a toothed drive pulley for the spindle....would this not be better using a Poly Vee type belt......there is a tendency for cyclic vibration to be imparted to the cutter and hence the job with toothed belts........I also believe that toothed belts don't last long at high speeds, but I might have misread this.

    Also while on the subject of spindle drives, you mentioned that a variation would be needed to allow different drive ratios to be explored......in that case I would fit a Poly Vee type pulley and use a taperlock for the spindle and motor attachment which makes changing and removing pulleys very easy, but still maintains perfect balance and security of drive.

    PS, your grinding wheel needs dressing....the finish on the table front is shocking...post #115 photo #4
    Ian.



  10. #130
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    Wink

    Quote Originally Posted by handlewanker View Post
    Hi skyfire, I think your machine would look good in red, not bright pillar box red but a deep red like old blood...LOL....maybe with a slight hint of Maroon in it.

    Just looked at the 4th photo in post #128 and the red colour looks quite good.

    BTW, I have been puzzling over something.......the X axis rails stick out in front of the slide....is this because the rails were too long and you didn't want to cut them short?

    Also I see you are using a toothed drive pulley for the spindle....would this not be better using a Poly Vee type belt......there is a tendency for cyclic vibration to be imparted to the cutter and hence the job with toothed belts........I also believe that toothed belts don't last long at high speeds, but I might have misread this.

    Also while on the subject of spindle drives, you mentioned that a variation would be needed to allow different drive ratios to be explored......in that case I would fit a Poly Vee type pulley and use a taperlock for the spindle and motor attachment which makes changing and removing pulleys very easy, but still maintains perfect balance and security of drive.

    PS, your grinding wheel needs dressing....the finish on the table front is shocking...post #115 photo #4
    Ian.
    Hi my friend, thank you for new comments here!

    Yes, I can imagin the dark red color...That would be cool I have ordered some orange color paint sample and will arrive in a few days I think. I think maybe I will make several different colorways then to get the best choice, haha..

    The rails of X, Z are all some longger than traveling needs. I made this intentionally. The porpose is to add the axis covering and the longger rail slots can hold the covers tight in case they plump up when compressed. Actually I just ordered the covers with some sketch and may avaliable after one week.

    just like the one used on another machine:


    I understand the comment on the belt and pulley issue. I chose the HTD-5M type timing pulley for this spindle system. The HTD type is very common on industrial VMC spindle units and run very smooth because the teeth is round type. So will not generate the vibration. Another small consideration is that the pulley structure is more simple than using V type belt system. I don't need special tighten structure of the motor part. The ratio changging structure you mentioned should be the most stardard one for spindle system. But that will need some special ordered pulley and associate parts may take some long time. So, I would like to try some easy way for me now.

    About pulley exchanging system, I'm planning small updates on the pulley and make it can be fatened on the shaft end(need thread on the center of the shaft end) so the pulley can be easily exchangged.

    Yes, very sharp observing...the grinding works of the worktable is not very good. The reason is that almost every machining supplier have closed for CNY. I don't have a grinding machine so this work is done in a road side small shop... That's the only one I can get for this prototype. Did you see the top of the worktable without scarly marks? I re-ground it manually with a big oilstone. That's some boring but careful work to make sure of good planeness. So checked many times with a dialgage during the grinding works.

    Now I'm doing the putty works...Another dirty work..haha. This just the first putty, so looks not nice. The casting surface is not bad, so it will save me many strength. I'm using some fast dry putty here, just save time.


    Last edited by Skyfire; 02-20-2013 at 12:49 AM.
    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  11. #131
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    Hi guys. I've installed all of the motors now. no problem in this part.
    Then I finished the putty works and ground the surface to be smooth. So totally the machine is ready for painting.





    Then the gas spring has been installed. so the Z traveling much easier now. should be better balance of up/down after spindle unit installed.



    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


  12. #132
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    The following work of accuracy adjusting is most important. Most of this part need work with the dialgage and stone ruler used former. I connected a stepper motor controller I DIYed before and make the adjusting quicker. I took only one picture during the adjusting. other steps were pretty similiar.



    Now I show the last accuracy testing report:

    (all error within full travel distance)

    X travel plate error: 0.02mm
    Y travel plate error: 0.01mm
    X-Y perpendicularity: 0.01mm
    Z-X perpendicularity: 0.01mm
    Z-Y Perpendicularity: 0.01mm

    Totally I'm very satisfied with the error result. I can test the spindle to worktable perpendicularity now. so have to wait the spindle unit.

    I'm sure if the grinding works of the worktable could be better, the X travel error should be within 0.01mm also. I could also do some manual fixing work with oilstone also to make it <0.01mm,,, but it will take some long time. so I just leave it as it is now.

    Nex I will just dissamble the machine and paint the main structure. And then assemble it again. I will measure the errors again when assembling again to make sure of same--or even better---just if I'd like to cost more time on it

    www.skyfirecnc.com
    Email: info@skyfirecnc.com; Skype: skyfirecnc


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Show how to build a CNC machine from the very beginning to the end

Show how to build a CNC machine from the very beginning to the end