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Type: Posts; User: UA_Iron

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  1. Re: NEMA 34 and DM860A. Low Speeds Stepper Motor Sounds Awful

    What stepper driver are you using to drive these motors?

    Agreed with the above for increasing microstepping value.
  2. Re: Will Mach3 communicate with MDrive34 Plus steppers?

    The Mdrive MDM series will accept step/direction input.

    MCM/MDI/MDO are other interfaces (Serial, Can, Ethernet etc) that as far as I know will not do coordinated motion necessary for a CNC.
    ...
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    Re: Closed loop stepper motors w/driver

    I have used a number of mdrive2 in my career. From what I gather for the lexium mdrive is that the closed loop functionality really is to maintain the synchronization over anything else - so the...
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    Re: Some advice and opinion on Clearpath servos

    That's an impressive servo motor you listed, even with an absolute encoder.

    I'm not sure he'll need more resolution to cut aluminum though - greater than the 6400 positioning counts per...
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    Re: Some advice and opinion on Clearpath servos

    From the clearpath documentation:



    It doesn't matter what the encoder resolution is in the case of the clearpath motors, you have either 800 or 6400 counts per revolution positioning options....
  6. Re: Cheap Ebay Stepper cable - anyone having problems with the oil and the jacketing?

    You sure you need 16g?

    If those are in flexing applications, you can count on the foil shield breaking over time and losing wire coverage. This will negate the shielding. Those wires are very...
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    Re: Dual y axis Fail Safe - E stop if 1 fails

    For frequently rotating components I would never use a hard coupler - but it sounds like you have some options for securing your current couplers down better. Use some permanent loctite in the 420,...
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    Re: Dual y axis Fail Safe - E stop if 1 fails

    what kind of coupling are you using? It might be cheapest to go with a better coupler and still remain blind to such failures.

    Schneider M-drive motors have an external encoder option -EE that...
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    Re: More Grounding Issues

    I find it kind of amazing that someone with so many years of experience with these kinds of electronics systems has not consulted with the manufacturer for insight and support on such issues.


    ...
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    Re: More Grounding Issues

    If noise is noise, you should try yelling at your machine every time it starts acting strange, maybe you can replicate some 180° offset phase that completely cancels out the noise that's causing your...
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    Re: Fixed Gantry Steel, wadeodesign

    Wado, I am living vicariously through your project here so I'm definitely excited by all your work - I just moved states so my project will continue to be pushed off indefinitely. As an engineer I...
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    Re: My Limit/Estop Strategy - Safety

    Oh no need for apologies, I just like to explain something if I think I grasp the concept on 'the why' aspect!

    It's always good to ask these questions, keeps everyone thinking and aware of...
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    Re: My Limit/Estop Strategy - Safety

    Multiple governing bodies for safety standards (CSA/UL/IEC etc) will not accept a software only solution as a means for safety of machine control devices that have potentially fatal consequences....
  14. Re: Does this exist or is it possible to achieve? Multi-material distance sensor

    I get emails from Vendors all the time about their technologies. Keyence sent me this just today and made me think of this thread:
    https://www.keyence.com/mykeyence/?ptn=001

    Or in the attached...
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    Re: Fixed Gantry Steel, wadeodesign

    Great video and update, Wado! Your machine is awesome and I imagine what many of us will be modelling ours after...

    Just a few things I noticed:
    1. The cabletrack/cablecarrier/cable chain: Looks...
  16. Re: Noobie needing help on finding Breakout board WITH USB

    You will want to use confirmed hardware with LinuxCNC (look at their forums). Some motherboards will not operate in the real time manner that LinuxCNC and the linux kernal is supposed to operate...
  17. Re: Does this exist or is it possible to achieve? Multi-material distance sensor

    What kind of accuracy would you need? An ultrasonic sensor would work well because it can see anything - it does not care about surface characteristics. It would have an analogue output in Voltage or...
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    Re: DIY CNC Router cutting steel

    The ballscrew mounting hardware backed out during operation?

    I would use some "permanent" loctite on those mounts/supports - and you just said that at the end of the video! I've pulled apart some...
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    Re: Microstepping, is it safe?

    This exact topic has been discussed in the sticky - starting back in January to October of 2015

    http://www.cnczone.com/forums/stepper-motors-drives/13678-effect-microstepping-torque-6.html
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    Re: 5-axis for machining metals

    The Nabtesco Vigo drives and Harmonic Drive reducers look awesome for a rotary table application, and could probably even be driven by a fairly small nema23 motor. I worked on an instrument where we...
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    Re: 5-axis for machining metals

    You bring up a good point about the mechanical system - a worm drive is superior for the application for the reasons you stated.

    I have to disagree with what you're saying about the stepper...
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    Re: 5-axis for machining metals

    The 4th axis typically won't need as much power as the other axes. If you know a feed rate that you'll be cutting a material at, and the dimensions of the stock, you can do a ballpark calculation of...
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    Re: 5-axis for machining metals

    Like many have said here before, I would design the mechanics of the system before the electrical system (including motors). Mechanical designs tend to evolve over time, and if you have already...
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    Re: Fixed Gantry Steel, wadeodesign

    I found a z-axis motor that would work well for you :)

    IMS Schneider MDM1MSZ42B2 EX MDRIVE42AC Plus Microstepping | eBay
  25. Thread: Orthogonality

    by UA_Iron
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    Re: Orthogonality

    I have always found misumi leveling screws to work very well for these situations:
    Leveling Bolts-Standard Type?MISUMI?MISUMI USA

    Allows you to set height, then clamp down with standard fastener....
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    Re: *Large* CNC Router Build

    There's a build thread here dating back to 2009 I believe where Mariss Freimanis (the gecko driver guy) was a part of - in this thread they built a massive Gantry CNC for cutting out giant foam...
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    Re: Weird Oscillation on Contouring

    I've been following this thread for sometime. I definitely have learned a lot about the capabilities of linuxcnc - thanks for this thread!

    Just wanted to add something hopefully useful:

    As far...
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    Re: Fixed Gantry Steel, wadeodesign

    $15 a pop is a bargain for these motors - even used. I found a few of the cables laying around my work and grabbed them so I have a few at home. There are even different series of cables that are...
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    Re: changing from rack and pinion to ballscrew

    You want to ensure that your ballscrew is perfectly aligned with your guides, use an indicator on one of the guides or tables and probe the ballscrew to ensure it is aligned.

    As far as RPM and...
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    Re: Check my schematic

    A limitation of the earth leakage circuit breaker is that it can be tripped by external voltages/currents from something connected to even metal pipes - in your situation, and to avoid nuisance...
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