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  1. #1
    Hello All,

    I am currently researching the options for building a 3 axis router. It seems if I am to upgrade in future it is worth buying decent components now.

    I have read some good things about the Geckodrives but do they offer improved functionality over other drives. i.e. is it worth forking out the extra to buy geckos or do I buy one of the ebay kits?

    I notice in particular the 'morphing' function, so it can accelerate smoothly.


    Any feedback/suggestions would be greatly received.

    Regards
    Andy

  2. #2
    It depends really on what size machine you're intending to use them on? Once that's known I can advise properly, but if it's a small machine you're unlikely to see the benefits.

    Edit: Also did you have a particular Geckodrive in mind?
    Last edited by Jonathan; 10-08-2012 at 08:07 AM.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  3. #3
    Quote Originally Posted by Jonathan View Post
    It depends really on what size machine you're intending to use them on? Once that's known I can advise properly, but if it's a small machine you're unlikely to see the benefits.

    Edit: Also did you have a particular Geckodrive in mind?
    Thanks for the reply.

    It will have a table of approximately 3ft x 4ft so I am considering 4Nm steppers paired with the geckodrive G213V which seems like it has been protected against almost everything so should last.

    Nema23 Stepper Motor 4Nm x 3

    G213V Selectable Resolution Digital Stepper Drive

    I have looked at some of the leadshine drivers. Do they perform the same morphing as the geckos?

    Regards
    Andy

  4. #4
    Hi Andy

    Have a look at this

    YouTube | RoboCNC.nl

    Third one across top "Testing Leadshine Stepper Driver"

    I cannot give you the direct Youtube link as I am at work and youtube is blocked !

    Andy

  5. #5
    Ok ounce upon a time I'd have said Gecko's can't be touched and still say they are top notch drives.! BUT the new lead shine digital drives are amazing and do everything the new geckos do with the added benefit they can be tuned in software and tweaked to perfection. I'm not talking the PM542/752 run the mill drives but the DM & AM range and the 542/752 can't touch the gecko's despite what John S say's (He's just a bitter & twisted old Git. .)

    Don't be fooled by the Gecko 203V/213V unkillable label because I've just killed a 203V no problem.!! . . . .BUT here's the sweet bit with Gecko's and why it can and does pay to buy them even if they cost a bit more.! . . . The drive I've just killed is almost 3yrs old it was completely my fault why it died by mixing power polarity up after testing another company's drive. Quick email to gecko and it's being replaced/repaired free of charge and that's with me being completely honest and telling them it was my fault. . . . Can't say fairer than that after 2.5 +yrs . . . . (Oh and in nearly 3yrs they haven't missed a beat or step, sometimes working for 36hrs non stop!!)

    John S is right thou that customs bend you over dry with stuff from the states so be prepared for the sting.!!

    Me if got the money I'd go for the Leadshine AM882 digital's next would be Gecko's after that then If I had to and was in a rush then PM752's other wise I'd wait and save up for the Digitals.!!

  6. #6
    Quote Originally Posted by JAZZCNC View Post
    Me if got the money I'd go for the Leadshine AM882 digital's next would be Gecko's after that then If I had to and was in a rush then PM752's other wise I'd wait and save up for the Digitals.!!
    Some great comments guys thanks for the replies.

    It looks like the leadshine drives work out much cheaper too. For what its worth is it better to go for the 856 over the 556 (up to 80V)?

    They also have these on the bay for around £60. Is there a fake drive market out there to be aware of or can I rest easy they will be ok?

    Andy

  7. #7
    Hi, Andy

    I am in the process and new the the cnc world. The set up I have built is Mach 3 with a warp 9 Ess, PMDX 126 and leadshine AM882 drives. I am having problems getting Motors to move from Mach. I have everything hooked up correctly as far as I can see. I did not hook up the enable to +5 v to the drives, because the PMDX typical hook up didn't seem to call for it. I can make motors turn form the Leadshine pro tuner with no problem, so that tells me there is something wrong with Mach settings. I am at a loss at this point. Getting frustrated. Hopefully you or someone knows about this set up.

    Thanks

    Ben B.

  8. #8
    Hi Ben,

    Not enough info to help I'm afraid. Need to know exactly what is connected and what isn't and to which pins etc.

    Best bet is to post Pics of the Motor outputs and Inputs and outputs in Ports n pin setup in mach3.
    Also what inputs your using on the PMDX and what goes to which. Also how the Dip swithces are set on the PMDX.

    It will be something simple like Active low or the PMDX not enabling it's motor outputs. Something daft like Possibly you haven't enabled the Charge pump or E-stop etc.

  9. #9
    The modern Leadshine devices are just as good, problem is with anything being imported from the States the customs has your pants down.
    John S -

  10. #10
    Buying drives from China is Ok but you have to buy in minimum quantities of 30, 50 is better and this way it covers for the odd dead one.
    John S -

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