Welcome to Our Community

Unlock hidden features. Sign Up for Free Today!

Z-Axis motor? + Controller ?

Discussion in 'General Talk' started by gazingm42, Feb 15, 2017.

  1. gazingm42

    gazingm42 Journeyman
    Builder

    Joined:
    Feb 8, 2017
    Messages:
    45
    Likes Received:
    9
    All, Thanks for all the help and posts on this board.

    So if I am building at 1000mm x-axis with a dual 1000mm y-axis I plan on using openbuild nema 23 with 345oz
    of torque, sku# 596. But for the z-axis any reason why I can not use openbuild nema 23 with 175oz
    sku # 518, since the Z-axis should not have that torque. Or am a missing something?


    With my countless hours of reading and watch youtube videos. I discovered the tinyg vs the Xpro V3
    controller a difference with 1/8 vs 1/32 stepping. So any thoughts on differences with this 1/8 vs 1/32 limitations.
     
  2. Limine3D

    Limine3D Well-Known
    Builder

    Joined:
    Jan 6, 2014
    Messages:
    16
    Likes Received:
    8
    I have both boards that I used to upgrade a Shapeoko kit. My initial preference has been Xpro V3 because it is smaller, I can use easel, and i could use grbl panel with it (much easier for a noob to use than the tinyg software).
     
  3. gazingm42

    gazingm42 Journeyman
    Builder

    Joined:
    Feb 8, 2017
    Messages:
    45
    Likes Received:
    9
    Thanks. What size is your cnc. What size motors did you use. I concern on the amps the pull of 3.amp. The f enrollees both said it uses 2.5
     
  4. Limine3D

    Limine3D Well-Known
    Builder

    Joined:
    Jan 6, 2014
    Messages:
    16
    Likes Received:
    8
    My CNC is fairly basic, so is only doing a cutting space of 12 inches x 12 inches and is using NEMA17 motors. I have hooked up the xpro to NEMA 23 motor with a max peak current of 2.8A and it worked fine (I have a c-beam bundle I am playing around with).
     
  5. gazingm42

    gazingm42 Journeyman
    Builder

    Joined:
    Feb 8, 2017
    Messages:
    45
    Likes Received:
    9
    Limine3D, So the NEMA 23 you have whats the torque on those? Openbuild has 2 nema 23 with different torque. Did you get these via overbuild or other sources?

    I am just curious if some of these NEMA 23 with 3.0 or even 3.5A will work with the Xpro??
     
  6. Limine3D

    Limine3D Well-Known
    Builder

    Joined:
    Jan 6, 2014
    Messages:
    16
    Likes Received:
    8
    The torque on my motors are 175oz-in and I got it from openbuilds. Unfortunately because the board is rated for 2.5A I would be reluctant to try a higher amped motor. A better option might be to get individual stepper motors that can handle 4+ amps if you are looking for that kind of thing. The thing with these here contraptions is they can get expensive quick, so I tend to buy within my budget, break it, then upgrade it!
     
  7. gazingm42

    gazingm42 Journeyman
    Builder

    Joined:
    Feb 8, 2017
    Messages:
    45
    Likes Received:
    9
    Because of cost I was looking at getting the same motor of nema23 175oz. I not sure the near double the cost of the 345oz touque is needed.
     
  8. Giarc

    Giarc Master
    Builder

    Joined:
    Jan 24, 2015
    Messages:
    493
    Likes Received:
    234
    My version of the Ox is a lead screw driven 1500 mm Y by 850 mm X and I use 269 oz (Or were they 270?) NEMA 23s on the X and Y and a 175 oz on the Z. It looks like the Parts Store no longer carries the 270 oz. I have a Makita 701 c router as my spindle that the Z needs to support. Last night, I easily cut in one pass 1/4 plywood with a 1/8" single flute bit at 3000 mm/min at setting 3 on the router which is 17000 rpms. I was able to cut 3/4 inch particle board in three 6.35 mm passes using those same settings. I could probably do it faster, but I did not see a reason to try. I have also cut aluminum plate at 700 mm/min at .2 mm depth of cut with no issues. I may try faster or deeper next time to see what happens. All that being said, there may come a day when I upgrade my two Y axis motors to the high torque. I would have started there if they were available then.

    I use the DQ542MA drivers (4 total) and an Arduino. I like this setup because it is only about $50 more than the Xpro if you buy a "real" arduino board (knock $10 off if you use a clone) and you can give the motors the amperage they want without worrying. I also noticed the DQ542MAs seemed smoother than the DRV8825 which I started with, which would occasionally miss steps due to overheating even with a fan blowing on them. My Z stepper also seemed to run much hotter with them.

    As for the price of the high torque, they are only about $15.50 more for the three you would need totaling $46.50. I believe you will easily get way more than $46.50 worth of performance out of them and with the price of the total build, $46.50 is not a large overall percentage. I feel the same about the DQ542MAs. If you fry one driver, you replace one driver. With an all in one board, that becomes much more difficult.
     
    #8 Giarc, Feb 16, 2017
    Last edited: Feb 16, 2017
    Joe Santarsiero likes this.
  9. gazingm42

    gazingm42 Journeyman
    Builder

    Joined:
    Feb 8, 2017
    Messages:
    45
    Likes Received:
    9
    I am finding lots of good info on programing the tinyg controller. But it has the 1/8th stepper limit vs 1/32 on the CNC xpro V3. But trying to find info on programing the board
    seems to be a issue to me. If anyone has any good sites on the software config for the board will be helpful. I trying to figure out what drivers I need for windows or raspberry to run ie grbl panel or
    universal gcode loader.

    Thanks
     
  10. Giarc

    Giarc Master
    Builder

    Joined:
    Jan 24, 2015
    Messages:
    493
    Likes Received:
    234
    1/8 microstepping is plenty for a CNC. It is what I use and my steppers run smooth. I may try 1/4 just for fun. I don't think you would notice the difference between 1/8 and 1/32 on a CNC router or mill. 3D printer - maybe. This is a good read. Micro stepping Myths and Realities
     
    #10 Giarc, Feb 17, 2017
    Last edited: Feb 17, 2017
    Joe Santarsiero likes this.
  11. gazingm42

    gazingm42 Journeyman
    Builder

    Joined:
    Feb 8, 2017
    Messages:
    45
    Likes Received:
    9
    Thanks, This helps a lot. Make my decision easier. I have my ordered all the hardware yesterday afternoon. Now it makes some of my electronics easier. Now the wait game for things to arrive.

    Thank you
     
  12. Limine3D

    Limine3D Well-Known
    Builder

    Joined:
    Jan 6, 2014
    Messages:
    16
    Likes Received:
    8
    thanks Giarc, for the information. Like I said before, my experience is just from experimenting with a shapoko. I would love to see a post on using the motor drivers on here or even on instructables.
     

Share This Page

  • About Us

    The OpenBuilds Team is dedicated helping you to Dream it - Build it - Share it! Collaborate on our forums and be sure to visit the Part Store for all your Building needs!
  • Like us on Facebook

  • Support Open Source FairShare Program!

    OpenBuilds FairShare Give Back Program provide resources to Open Source projects, developers and schools around the world. Invest in your future by helping others develop theirs!

    Donate to FairShare!