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ooznest OX CNC Machine

Discussion in 'CNC Mills/Routers' started by Ryan Lock, Apr 28, 2015.

  1. Spider1967

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    This is a link to some video of the problem to help try and pinpoint the issue
    Any ideas?
    I'm not 100% it is motor problem but I'll try anything.
    Anyone seen anything like this before?
     
  2. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
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    Sounds like lost steps, is your current set the same for both drivers, double check! swap a motor from your z to there, if it’s still there swap the driver.
    Could also be a connection issue.
    Good luck
    Gary
     
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  3. Spider1967

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    When you say lost steps those are because of a defect in the motor?
    The current set up had same motors on both sides.
    What kind of connection issue could cause it?
    Thanks for info so far.
     
  4. GrayUK

    GrayUK Openbuilds Team Elder
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    I could be wrong, but does it happen around about the same place all the time? :rolleyes:
    Put a pencil mark, using just one wheel as a reference, on the Aluminium at each point it clunks. :)
     
  5. Spider1967

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    It does seem to be at the around the same place every time.
     
  6. GrayUK

    GrayUK Openbuilds Team Elder
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    Gotta be mechanical I reckon. It does sound like the grub screw has worked its way out, and you can hear it slipping around till it hits the flat again.
    However, that should happens all over. At the point where it is worse, have you checked for square between the X and Y axis?
    How is it at the extreme ends of the Y axis?
     
  7. Spider1967

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    It does seem pretty square at extreme ends.
    I’ll do some double checks tomorrow.
     
  8. Spider1967

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    Ok time for an update.
    A friend suggested I swapped the cables so Y cable 1 was in socket 2 and visa versa bad hey presto it seems to work fine. I’ve had it up to 3m/min with not skips.
    Seems the build guy labelled them up wrong. Doh!
    I’ve calibrated all axis and it seems to be working nicely.
    Thanks to all here for you help.
     
  9. Spider1967

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    Next questions
    1. I’m using Universal Gcode sender classic 1.09. What is the best post processor to use with this software.
    2. I’m using Aspire to draw the parts
    3. The ox has the Makita router fitted. There seems to be limited collets available and I need to use 3mm / 4mm / 5mm and 6mm drills and cutters. I’ve not seen 3mm or 5mm collets for that router. Any ideas how I can hold the tools I need to use.
    4. I tried an extension for er11 collets that I cut down but it doesn’t run true. When I use cutters straight into router then run lovely.
    Any and all ideas or help appreciated.
    Thanks
     
  10. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
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    UGS, if it's working for you don't "fix" it!
    The only place I know of making collets for the Makita RT701 is Elaire, good quality but $$, I use one for 1/8".
    Cheers
    Gary
     
  11. Spider1967

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    UGS does work fine it’s the right post processor I’m unsure about.
    Does GRBL processor work best?
     
  12. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
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    Right, in Aspire select GRBL post.
     
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  13. Giarc

    Giarc OpenBuilds Team
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    The Elaire collets are nice. I bought the set of three. 1/8, 3/14, and 1/4. Your 3 mm should be able to make every size hole, or slot, you need...as long as it isn't smaller than 3mm or larger than you cutting area. ;)
     
  14. Juha80

    Juha80 New
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    Hi,
    I'm new in CNC world and need some help. I bought a workbee 1000x750 screw machine and it works great. Only issue is that it's not accuracy. If I design 260mm circle it comes out 261mm. Circle is perfect, not oval. I also cut maximum length Y-axis line whitch should be 770mm long and it came out 772mm long. Same thing in X-axis. 550mm is 552mm. I cut those lines manually using Universal Gcode Sender buttons.
    For CAD and CAM I use Fusion 360 and post process general grbl.
    Any Idea what's problem?
    -Juha

    edit: I think I need to calibrate my machine :)
     
    #1064 Juha80, Nov 17, 2018
    Last edited: Nov 17, 2018
  15. joe williams

    joe williams Well-Known
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    Have you calibrated your machine?

     
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  16. Juha80

    Juha80 New
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    Thanks Joe! I think that's the solution. I miss that calibration part in Workbee manual or there's no mention of it. Maybe they include it next edition.

    -Juha
     
  17. joe williams

    joe williams Well-Known
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  18. Robert Towner

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    Hey Guys, anyone tried carving up some PurpleHeart on your OX before? This stuff is hard as a rock! I definitely went at it way too aggressive to start and had a nice little scare when the router took off in the wrong direction. Really had to slow things down and take it easy. I will be running some tests tomorrow to try and get some feeds and speeds dialed in, but was curious if anyone has any experience with this wood and has any advise for starting points.
    Thanks!
    Robert
     
  19. GrayUK

    GrayUK Openbuilds Team Elder
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    Not being a "Woody" person, I had never heard of this wood before, but I just looked it up. What a beautiful looking wood!! :D
    Mind you, finding good looking pieces of wood in this country is like trying to find Rocking Horse Poo, :jawdrop: and if you did, you'd have to sell your CNC to be able to buy it. :D
    I don't know where you are based, but you are so lucky to have such woods on hand. :thumbsup:
    Apparently, it certainly seems to be a challenge when trying to work with it, especially using high-speed tools and heating up the wood. I hope others can advise you on this wood, if not here, then maybe on a Woodworking site.
    Come back though, and let us know how you got on. :thumbsup:
     
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  20. Alex Chambers

    Alex Chambers Master
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    Can't help you with feeds and speeds for cnc yet (still building my workbee) but routing purple heart I have found a high speed/medium feed best. It will go bright purple if it gets hot, but will fade back to browny-purple eventually. Watch out for the grain direction - it tends to tear out sometimes. Also blunts tools quickly. Does take a lovely finish though.
    Alex.
     
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  21. LeeH

    LeeH New
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    Hi I'm trying to decide on the Makita or Dewalt router for my Ooznest OX. My first thought was the Dewalt, but I will be cutting acrylic and PVC as well as wood. But I'm thinking the lower rpm of the makita would be better for the plastics. Any advice would be appreciated. Also would I need the mount adapter to mount the Makita in the Ooznest mount kit?
     
  22. Rick Holder

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    Hi Lee,

    I use a Makita trimmer/router CX range with adjustable speed and custom mount and it’s great for plastics. Trial and error will get you the best feed and speed rates with the type of material used. I haven’t ever used a dewalt router so can’t give you an option. Good luck, Rick.
     
  23. sharmstr

    sharmstr OpenBuilds Team
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    I cut plastics with the dewalt no problem.
     
  24. Alex Chambers

    Alex Chambers Master
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    You'll need to check with Oozenest, but they seem to have discontinued the Ox - it's no longer on their website. If you buy the Makita from Oozenest they supply a collar to fit the Makita to their standard router mount. Otherwise there are adapters available on Thingiverse for 3D printing. If you haven't got a printer I am sure someone on here could help you out for the postage cost. (including me if you are UK based) If you are cutting plastic a lower speed is a definite advantage, although lots of people on here will tell you that they are cutting plastic with the Dewalt. I cut some polystyrene this afternoon with the Makita at its lowest setting and would have gone slower if I could.
    Alex.
     
  25. Gary Caruso

    Gary Caruso OpenBuilds Volunteer
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    What I like about the Makita is the parts are cheap and the router itself is available globally and cheaper. From personal experience the makita is quieter even at similar RPM than the dewalt.
    Both require expensive collets to do other than 1/4" (or 6mm in some countries) making a spindle with ER11 or ER16 collet standard more attractive.
    Dewalt collets link
    Makita collets link
     
  26. Ryan Lock

    Ryan Lock Veteran
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    Hi Gary,

    The Makita is a cheaper model with a greater RPM range. The collets are quite expensive, but they are an aftermarket product, which we could do more about the price.

    We do sell an adaptor so it fits the standard router mount: Router Mount Adaptor For Makita RT0700CX4 - 3D Printed

    Best Regards

    Ryan Lock
     
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  27. LeeH

    LeeH New
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    @ Ryan Lock I decided on the Makita Router and my order from you for OX router mount, Makita adapter and a couple of collets has just arrived. The mount kit came with 6x 20mm M5 low profile bolts. I can only figure out where 4 of them are used, what are the other 2 for?

    Also are the downloadable files for the OX still available? Even though you no longer sell the OX it would be nice if your website had a section for discontinued models.

    Lee
     
  28. Ryan Lock

    Ryan Lock Veteran
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  29. LeeH

    LeeH New
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    I got my new router mounted and trammed, went to try it out, but my workshop PC is dead. I'm gutted I can't try it out this weekend and am gonna have to source a new motherboard on Monday.
     
  30. paul.ludwa

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    Hi,
    I am a happy owner of ooznest CNC 1500x1500 screw drive with Dewalt D26200 as spindle.
    I am urgently in need to perform heavy drilling operation in plywood, around 500 holes, 8mm diameter. Holes have to be made before cutting out elements as preferably I want to make all the other operations (pocketing, profiling) using the machine.
    I have already ruined one router bit and burned the holes (they are practically black).

    Dear users,
    what is the optimal (regarding costs, speed and bit usage) way to do drilling operation ? I am using Vcarve Pro for preparing models and generating toolpaths.
    Thank you very much for your help!
     

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