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  1. 13-03-2018 #11
    Desertboy's Avatar
    Lives in Leicester, United Kingdom.
    Desertboy
    Last Activity: 26-02-2025 Has been a member for 7-8 years. Has a total post count of 1,005. Received thanks 85 times, giving thanks to others 756 times.
    Quote Originally Posted by Nickhofen View Post
    It seems that i mess things up.
    I order first two AM882 stepper drive they are on the way and today I discover that they are not the -H version, how bad is that?
    No problem at all I have 1 AM882 and 3 AM882h the only differences are the h are rated for AC and also for a slightly higher input voltage (100vdc instead of 80vdc)

    feed them ~70v dc and they perform identically, I mixed them and I don't know which one is which lol they all fire stall protect fine if I drive the machine to hard and jumper setting are universal between them.

    In future I am going to buy 4 AM882h's for a bigger build but I have a spare toroidal transformer that outputs 78v when rectifed which is high for the AM882's but fine for the AM882h's.

    One thing I'm sure is just good practise is if you have a dual ballscrew Y axis using 2 AM882's (Or h's) on that axis and not mixing them.
    Last edited by Desertboy; 13-03-2018 at 07:53 PM.
    http://www.mycncuk.com/threads/10880...60cm-work-area My first CNC build WIP 120cm*80cm

    If you didn't buy it from China the company you bought it from did ;)
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