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Open builds stepper motors out of stock?

Discussion in 'General Talk' started by gregers05, Feb 25, 2019.

  1. gregers05

    gregers05 Journeyman
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    not sure if this has been answered elsewhere, but I am looking to purchase a leads 1010 in the next month or so and noticed that the stepper motors have been out of stock for a while. Is there a time frame when these will be back in stock?

    If I get a stepper motor from elsewhere, will that work on the leads? Wiring will plug right up?
     
  2. MaryD

    MaryD OpenBuilds Team
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    If you are planning to order in about 3 - 4 weeks, you should be fine.
     
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  3. gregers05

    gregers05 Journeyman
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    perfect thanks!
     
  4. Kax

    Kax Well-Known
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    Good to hear. I got the LEAD Machine on preorder without the motors because none were in stock. I will wait for the motors to become available here. This is my first CNC machine and I want everything to be compatible.
     
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  5. Steve007

    Steve007 Well-Known
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    I'm hoping they will be in stock soon myself. I bought a Workbee 1010 two weeks ago and I'm ready to start cutting. I'm not new to cnc, but I am new to DIY hobby machines so I'm a bit leery about buying elsewhere in fear of incompatibility issues. I watch the parts store daily for them to be back in stock
     
  6. gregers05

    gregers05 Journeyman
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    This was also my issue. Ill be ordering the lead in the next week or so. I can buy basically the same motors for similar price or a little cheaper, however I am not sure how the wiring works out with that. I assume the OB motors have all the correct connectors and what not already. I don't really want to mess with trying to match up connectors and stuff. But maybe I am wrong.
     
  7. Kax

    Kax Well-Known
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    It would be nice if we could preorder the motors so that we didn't have to check back everyday.
     
  8. Steve007

    Steve007 Well-Known
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    That would be nice. I think I'll email the openbuilds people and ask about that.
     
  9. RoosterTX

    RoosterTX Well-Known
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    I ordered my Lead CNC on 22 Feb. At that time the estimated ship date was 28 Feb, still awaiting fulfillment as of today. Steppers were out of stock as well at that time. If anyone gets an update on things, please advise...
     
  10. GrayUK

    GrayUK Openbuilds Team Elder
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    RoosterTX: If you haven't done so yet, please contact the Parts Store - FAQ CENTER - Drop Down Menu - Contact Us.
    I'm sure they will be able to advise.
     
  11. RoosterTX

    RoosterTX Well-Known
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  12. Steve007

    Steve007 Well-Known
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    I looked at these also. The shaft on the openbuilds steppers are 1/4 inch and shaft on these from Amazon are 10mm. I don't know if that means it can't work or you may just have to modify the flex coupling to the lead screw.
     
  13. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    As @Steve007 noted the shaft is too large but also the 4.2Amp current requirement on that model is too high unless you are using the DQ542MA Stepper Motor Driver to power it. The next model down from Stepperonline is a 269oz.in model that should be suitable. It's not quite as strong as the 345oz.in model from the parts store but it's up to you to determine as to whether that much power is necessary based on how you intend to use the machine.
     
  14. RoosterTX

    RoosterTX Well-Known
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    I'm going to be using the new Black Box controller from the parts store - already on order. So I assume with all these differences I should just wait on the Openbuilds motors. I really hope they're not a month or more out. I'm too excited to wait that long to get the machine built!
     
  15. Steve007

    Steve007 Well-Known
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    I'm going to wait it out also(for a little while anyway). My workbee 1010 is still in the boxes so if I have to return it I can. I don't want to, but if openbuilds can't get motors or at least direct us where to get them I may have to. I chose the openbuilds machine over the shapeoko because of the lead screw option. Lead screws aren't much use if you can't turn them.
     
  16. Steve007

    Steve007 Well-Known
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  17. Rick 2.0

    Rick 2.0 OpenBuilds Team
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  18. Steve007

    Steve007 Well-Known
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  19. Rick 2.0

    Rick 2.0 OpenBuilds Team
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    I know you're in a hurry to get building but all I can do is recommend you be patient. When it comes to cutting aluminum the Lead system is hands down better than the Shapeoko. But putting an oversized motor on the system is also not a good idea. This is a system you'll have for a while. Be patient, get it right and you'll be happier in the long run.
     
  20. Rob Taylor

    Rob Taylor Master
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    I do recommend the STEPPERONLINE motors, for anyone who needs any in a hurry while they're waiting. Nicely-packed, with good literature, at very reasonable prices. And of course, that Prime shipping!

    Ditto also on not over-driving the machine. Having motors on there that are capable of more than the machine itself is a recipe for bent screws and twisted rails. Get whatever torque matches the OpenBuilds "high torque" motor, because they've already thought about what's appropriate for the extrusion frames.

    Plus, on the technical side, the higher the torque at a given frame size, the further out of whack your inertial coupling is going to be (limiting force transfer efficiency, translating to acceleration, largely), and on top of that the slower your accelerations are gonna be capable of being because the increased self-inductance (because of intrinsic higher inductance for more torque) is gonna limit how fast your coils can come up to full current. You want the smallest possible motors you can get away with, and typically (for higher-speed motion) it's better to go up a frame size and keep it short than to get enormously long high-torque motors. High torque winds are for lower-speed builds.
     
  21. Gary Caruso

    Gary Caruso OpenBuilds Team
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  22. Rob Taylor

    Rob Taylor Master
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    I just tested- $15 in US UPS shipping for three motors puts it above the Amazon price, even with a 3+ volume discount on the motors. Other countries and motor sizes may vary, of course.

    If you're of the boycott-Amazon persuasion, it's not enough of a price difference to get enormously concerned about. Maybe $2 a motor.
     
  23. Gary Caruso

    Gary Caruso OpenBuilds Team
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    Another option is Valuehobby.com they sell some of my rc airplane designs... I'm using the 269ozinch motors from there no issues (out of stock on that size though).
     
  24. Steve007

    Steve007 Well-Known
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    Thanks for the info guys. I'm learning all of this as I go here. I'm a trade machinist with 20 years experience so I'm not new to cnc but I am definitely a noob to building a hobby machine. Especially with the electronics side of it. I'm used to industrial equipment with servos and plenty of machine weight.
     
  25. Rob Taylor

    Rob Taylor Master
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    Those are good prices! Looks like they have USPS shipping options as well, which would put them at a really good price point, albeit perhaps at a slower shipping speed.

    Bear in mind all the lessons you learned on the job still apply. Extrusion machines are a sort of hack, a workaround to avoid needing castings, servos, weldments, and all the other heavy, expensive, and power-hungry stuff that kept CNC away from hobbyists. But mass and damping, resonance bands, rigidity, etc etc all still apply. The more you can make a machine like a "real" machine, the better it's going to perform- because the real deal have been under development for decades, and the laws of physics are fairly immutable.

    Of course, for some things like lasers, pick'n'place, etc, they're absolutely perfect. Light and fast is exactly what you want. But a 3D printer or a gantry router, however good it may be, would be better if it was made of cast iron and ran on servos and ballscrews. There are hybrids, where people fill their extrusion with sand or screw linear rail to aluminum extrusion and things like that, it's just a case of finding the point where you're happy with the performance, I suppose. Plenty of people are perfectly happy with their machine performance right out of the box, which is fantastic!

    Not to be discouraging or anything, I think the rise of the extrusion machine hobby is great and we've all seen solid results from even plywood machines, just an important point that occasionally bears repeating, I think.
     
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  26. Kax

    Kax Well-Known
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    Is there any ETA on when the motors we will available again? Thanks.
     
  27. Steve007

    Steve007 Well-Known
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    The openbuilds team told me as soon as this week. You should email support and ask them to process an order for you. They will send you a PayPal invoice and you can basically prepay and they will ship the motors when they are in stock. This is what I did, hopefully they ship out this week.
     
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  28. Kax

    Kax Well-Known
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    Nice! They are back in stock. I just got 4. Thanks!
     
  29. Steve007

    Steve007 Well-Known
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    Yeah, I looked earlier and saw they were in stock again. Hopefully I'll be getting a email soon saying mine have shipped.
     
  30. gregers05

    gregers05 Journeyman
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    Been waiting weeks for the motors to get back in stock. Just put my order in for the Lead! Pumped to get it.
     
    Steve007 likes this.

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