Welcome to Our Community

Some features disabled for guests. Register Today.

OpenBuilds OX CNC Machine

Discussion in 'CNC Mills/Routers' started by Mark Carew, Dec 15, 2013.

  1. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Aug 6, 2013
    Messages:
    3,237
    Likes Received:
    1,815
    ok then ditch the parallel port breakout. An Arduino running GRBL only needs a USB port. There are many GUI's for driving GRBL but only a few make use of the latest features. Which one you choose in the end depends on what you want.
    I recommend UGS only for the setup phase. It just makes setting up GRBL easy. However I don't like it for normal running. Once GRBL is setup you should not need to do it again (but backup the settings, right?)
    I really like Candle because of the way it implements jogging, but it does not implement work offsets properly for what I want so I switched to....
    bCNC which does the offsets very well but jogs in the 'old' way. (it also runs on Windows and Linux so I was able to load Ubuntu on an old laptop and run it there which freed up my main laptop for other things.)

    With all of them I did find that my wireless mouse would leave a screen button stuck down now and then, causing some interesting crashes. I switched to a wired USB mouse and have never had that problem again.
    well, if you watch my videos I linked to you will see that using Sketchup with Sketchucam has to be the simplest thing ever, mostly because you are drawing 2D shapes and adding cutlines around/within them. No need for 3D drawings at all.
    what you need to do then is watch both of the 'building the OX' videos. This will give you insight into both the physical build as well as the electronics.
    OpenBuilds OX CNC Machine
     
    #3451 David the swarfer, May 8, 2018
    Last edited: Jul 9, 2018
    Mark Carew likes this.
  2. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
    I think this will not save you much as i don't think it's the correct V slot 2040, so the wheels will not work, Openbuilds shipping is reasonable.

    upload_2018-5-8_8-35-27.png
     
    Mark Carew likes this.
  3. Ruben Barrios

    Builder

    Joined:
    Apr 23, 2018
    Messages:
    12
    Likes Received:
    7
    Thanks Gary for catching that. I was just about to order that extrusion today. In that case, I will not have extrusion left over to build my acro, but no problem, I can just order more.

    Also, thank you David for the information on the arduinos. I bought a few thinking my son was going to get into robotics, but he never did, so I might as well put them to use.
     
    David the swarfer likes this.
  4. Ruben Barrios

    Builder

    Joined:
    Apr 23, 2018
    Messages:
    12
    Likes Received:
    7
    So because of Paypal delaying the funding of my account, I was not able to order my extrusion until a few days later and what do you know, free shipping. Now I have everything inbound and hopefully will have enough here to start building this weekend. Now that brings me to another question. Do I really need an Acro? Since this machine will do pretty good resolution and is as big or bigger than the acro I was planning, would I be better off just mounting the laser on the Ox? What would the benefit be for a stand alone laser as opposed to using the Ox?

    On a more technical question. Either way, I would like to build a 4th axis jig to allow me to route or laser round objects. If I do use the Ox to do my lasering, would I be better off using two arduinos to switch between the laser setup and the router or just reprogram the one controller? Secondly, I would love to do my own laser inlay kits for pens which would entail cutting two tubes of wood with a pattern through one side. This would be to allow the interchange for the two pieces for contrasting woods.My question is what could I use as a center to prevent the laser from cutting through to the other side of the tube, prevent reflection of the laser, and be economical enough to be disposable? Or maybe I should be asking this on the laser forum.
     
  5. Gaou²

    Gaou² New
    Builder

    Joined:
    Nov 17, 2014
    Messages:
    20
    Likes Received:
    2
    guys i need some help . I have build a 1,5m x 1m ox use it for a while ( basically playing and fooling around) but there is something in the movement at both belt axis ( x and y) that i cant understand and doesn't seem right . It kinds of kick while moves ( it is like a small jump or a kick to unknown direction sorry but even this is difficult to identify) and i dont know where to look.

    Everything was smooth enough ( all v-wheels have been left with some tension) so i cant understand what may be the cause. I inspected the wheells the belts the pinion the stifness ( if there is any :) ) and all seem in normal condition.

    I am starting to think it is a software problem ( mach3 settings) . but even there i dont what to look for.

    I can post some photos but i don't know what to shoot.

    any tip would be big help,
    Pavlos
     
  6. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Aug 6, 2013
    Messages:
    3,237
    Likes Received:
    1,815
    sounds like pulse train jitter, ie the series of pulses from Mach3 to the drivers are not contant.
    be sure to go to the Mach3 website and follow ALL the instructions for how to set up Windows for use with Mach3.
    If you don't get this right it will never be reliable.
     
    Gaou² likes this.
  7. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
    Are you running dual belts? could be the belt running up on top of the other.. doesn't ever do it on Z?
     
  8. Gaou²

    Gaou² New
    Builder

    Joined:
    Nov 17, 2014
    Messages:
    20
    Likes Received:
    2
    what do you mean dual belts i am having one on every side ( two steppers).
    Today in the morning everything was running fine. yesterday the spindle was sounded strange too. today i got smoke from the vfd . i don't know if all these are related but yesterday that i have notice the movement problem the spindle had a period drop of rpm .

    at this time the steppers are running fine but the vfd is out of order.

    last news is all running fine. i saw i have the 35000Hz in kernel speed. change it to 25000 and now i am getting moves without a "jump"
     
  9. Ruben Barrios

    Builder

    Joined:
    Apr 23, 2018
    Messages:
    12
    Likes Received:
    7
    Lessons learned so far. The Chinese screw sets sold as being for the Ox are not low profile, so they may cause clearance problems. In my case, I had to add 1/8" spacers to allow for clearing the heads (replacement low profile screws have been ordered to replace these and remove the spacers). The plates I purchased are a little thicker than those in the plans, so I ended up having to reorder screws adding 5mm to many of them to allow for the extra thickness of the plates. Also, take your time and hand tap. I know many videos show people using a drill and a drill/tap, but after breaking one, I switched to hand tapping and had no issues afterwards. Thankfully the hole with the tap stuck in it is on the Z axis, so I can get away with two screws to attach the plate instead of three.

    I also found out there is a huge difference in sizes of 270 oz NEMA 23's. I had three from a prior attempt at a build, but needed a forth for this build. The one I received was much smaller than my other ones even though they have the same 270 oz rating. I will be using the odd smaller one for the Z axis.

    Hopefully I can get the machine fully built by this weekend leaving only the electrical and computer stuff to finish off. Wish me luck.
     
    GrayUK likes this.
  10. Gaou²

    Gaou² New
    Builder

    Joined:
    Nov 17, 2014
    Messages:
    20
    Likes Received:
    2
    guys i need an idea on where to mount a microswitch for the zaxis. during the two months i have this build i couldn't find a solution so every idea would be usefull..! zaxis.jpg
     
  11. JustinTime

    JustinTime Veteran
    Builder

    Joined:
    Dec 18, 2013
    Messages:
    756
    Likes Received:
    252
    Limit switches are comprised of two parts. The switch itself and an actuator. Install the limit switches on the alu plate and the actuator/lever on the 20x60 that holds the spindle.
     
    Gaou² likes this.
  12. drcyberg

    drcyberg New
    Builder

    Joined:
    Jun 22, 2018
    Messages:
    2
    Likes Received:
    0
    Hello everyone!
    I like build work area 1000x2000, because only give this size (steel, aluminium). Possible modify in the OX calculator and great work machine? Or need more any componens?
    P.S.: The OX calculator only 1500 can! :-(
    Big thanks!
    Regards!
     
  13. tazma

    tazma New
    Builder

    Joined:
    May 17, 2018
    Messages:
    31
    Likes Received:
    2
    Hola, voy a montar este CNC (Router CNC de código abierto OpenBuilds OX) pero no sé que motores se necesitan gracias
     
  14. Spider1967

    Builder

    Joined:
    Jun 5, 2018
    Messages:
    19
    Likes Received:
    2
    Hi
    I’m using an ox 1m x 1m with c beam ball screw driven z axis
    At present it has a Makita router fitted.
    The limited range of collets sizes is a pain in the backside.
    I’d like to fit a ER collet router that is air cooled.
    Has anyone any advice or experience of fitting these type of spindles to a c beam Z axis.
    Any recommendations for an ER collet type spindle.
    Cheers
     
  15. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
  16. Giarc

    Giarc OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Jan 24, 2015
    Messages:
    2,898
    Likes Received:
    1,613
    Good find. I don't remember them having the metric sizes when I bought mine. I may grab the 8mm.
     
  17. Spider1967

    Builder

    Joined:
    Jun 5, 2018
    Messages:
    19
    Likes Received:
    2
    I've looked at the Elaire website and I can't find a 5mm collet for the Makita
    I think I've sourced the other sizes I need but I'm drawing a blank on the 5mm.
    I really need to drill 5mm for m6 holes
    if I can find a 5mm solution then the Makita can stay.
     
  18. JustinTime

    JustinTime Veteran
    Builder

    Joined:
    Dec 18, 2013
    Messages:
    756
    Likes Received:
    252
    The 3/16" collet is very close to 5mm and those bits are a dime a dozen shipped from China.
     
  19. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
    Don’t use a drill operation use a helical drill opperation with a 1/8” bit or 4mm endmill.
     
    Giarc, Spider1967 and Rick 2.0 like this.
  20. Spider1967

    Builder

    Joined:
    Jun 5, 2018
    Messages:
    19
    Likes Received:
    2
    Has anyone cut HDPE or polypropylene sheet with an ox?
    15mm thick,
    I’m looking for recommendations for depth of cut and feeds and speeds. I’m using a 6mm end mill.
    I’m getting steps on one edge which I need to work out how to stop this from happening.
     
  21. blindflight

    blindflight Well-Known
    Staff Member Builder Resident Builder

    Joined:
    Sep 19, 2013
    Messages:
    53
    Likes Received:
    56
    I have a OX that was built awhile back and it was working and the next day I went to cut a file and all my settings seem off. The machine was not cutting the file I had loaded. I had sent in my controller boards (3) to be checked and all are good. After 6 months of frustration I am giving it another try and I made a simple shape and did a dry cut using a marker. Well now it seems my dimension's are off quite a bit. one length should be 2" and is 1/2".. Any thoughts..
    Thanks
     
  22. Giarc

    Giarc OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Jan 24, 2015
    Messages:
    2,898
    Likes Received:
    1,613
    What software are you using and what are its settings?

    What are your GRBL $ settings you enterred into the software?

    Have you ever calibrated your Ox?

    Where did the file come from? Did you design it yourself? If so, with what software? What were it's settings (ie metric or imperial)?

    Do you read other threads on this forum? Similar problems are being discussed in multiple threads.
    Lots of variables are at play. Without more information, it is hard to help.

    My guess would be that since you are off by exactly a factor of 4, your microstepping is set wrong. Either a jumper or in your GRBL settings loaded to your board.
     
    #3472 Giarc, Jul 22, 2018
    Last edited: Jul 22, 2018
    GrayUK and Gary Caruso like this.
  23. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
    Hi Spider,
    Cut lots of HDPE, it's one of the easiest things to cut.. Polypro on the other hand.. not as hard to get right as acrylic but it will melt on you if you get it wrong.
    Best way is to start cutting some scrap or small test cut files to get it dialed.
    I never used such a big bit so my results would be different than yours.
    Also fewer teeth the better, such as 2 flute or O-flute (one flute) will work best.
    With a 1/8" two flute on HDPE I was doing 1000mm/min and 1.5mm depth, with about 16k RPM.
    With Poly, I was melting it until I switched to a O-flute type.. about same settings from what I remember.
    Good luck
    Gary
     
    Spider1967 likes this.
  24. blindflight

    blindflight Well-Known
    Staff Member Builder Resident Builder

    Joined:
    Sep 19, 2013
    Messages:
    53
    Likes Received:
    56
    Boards were sent to factory and checked , returned good per vendor cnc pro boards
     
  25. Giarc

    Giarc OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

    Joined:
    Jan 24, 2015
    Messages:
    2,898
    Likes Received:
    1,613
    Yes. That is great, but all those questions I asked would help answer the question as to why your machin is off by a factor of four and apply to all boards or board/driver combo.
     
    GrayUK likes this.
  26. cncmystic

    cncmystic New
    Builder

    Joined:
    Aug 2, 2018
    Messages:
    20
    Likes Received:
    4
    Aluminum cut piece looks good and all done on the OX !!! Great !!!
    You say that you cut steel as well ?? What accuracy did you get on that ? flexing and all that !
    I am looking at getting the WorkBee that has C-beams and thus hopefully a lot more sturdy so that bodes well for aluminum milling !
    I like your aluminium table. Looks great. Could you tell me what is behind the design of this and how you intend to make use of it ?
     
  27. daniel lopez hernandez

    Builder

    Joined:
    Nov 10, 2014
    Messages:
    2
    Likes Received:
    0
    hi

    does the xPRO V3 , work with mastercam ?

    i try many times but when i use mastercam and generated the gcode, the cnc get crazy
     
  28. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
    Hi Daniel,
    Does it have a grbl post processor? Looking around quick it looks like it doesn't, so it's using codes that are not supported.
    Regards
    Gary
     
  29. Gaou²

    Gaou² New
    Builder

    Joined:
    Nov 17, 2014
    Messages:
    20
    Likes Received:
    2
    guys i need some help . i replaced my x axis belt with a leadscrew 10x3 ( 3 pitch 3 lead ) . i set the steps per second at 666.6666666667 ( is this a bad number ?) . Anyway i am getting an error that the speed is too high for the kernel speed so i am lowering my speeds way down but then it gets too slow.

    am i missing something here?
     
  30. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
    Staff Member Moderator Builder

    Joined:
    May 19, 2016
    Messages:
    1,184
    Likes Received:
    531
    Hi Gaou, first thing we need to know is what controller and what driver settings, the steps per mm will reflect the lead and your microstep setting.
    If you are accedding the frequency of the system you can lower your micro steps.
    If you are using 1/10 microstep now (which would make sense for 666.666) try 1/4 and the steps per mm will be 266.666
    Cheers
    Gary
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice