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  1. #351
    m_c's Avatar
    Lives in East Lothian, United Kingdom. Last Activity: 4 Days Ago Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 2,908. Received thanks 360 times, giving thanks to others 8 times.
    I wouldn't bother, unless the power on surge is a problem, as it's just something else to give potential problems.
    Avoiding the rubbish customer service from AluminiumWarehouse since July '13.

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  3. #352
    Looks like I'm going to have wait at least another day the AM882 will come from China quicker lol

    Click image for larger version. 

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    Been on phone will either be redelivered tomorrow (If it's ok which it will be of course, things are like house bricks) or new one sent out for Monday
    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 ;)

  4. #353
    My Hermes claimed they tried to deliver it today although I was there with the roller shutter door open so they are lying bastards, have to wait till Monday, would have been quicker to order from China lol.

    Using the 50v transformer as a pattern (the 45v will be identical) so started to think about kitting out the box, anyone see any issues having the transformer under the stepper driver? I am going to fit 2 pc fans one sucking in and 1 extracting.

    Click image for larger version. 

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    Going to use new capacitors as I have them and am going to need to fit everything a bit tighter.

    You can just see the breakout board in the corner on a bit of ply will fit it roughly there and chop a hole with a cutting disc for the parallel port and USB to stick through.

    Not sure I will fit the other BOB as I really don't need extra the input pins, good to have a spare though.

    What's everyone set there AM882's microstepping up at?
    Last edited by Desertboy; 18-11-2017 at 06:47 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 ;)

  5. #354
    Transformer came finally! didn't get round to soldering it but will have it up and running tomorrow ;)

    Click image for larger version. 

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    Damn just realised I wired this up wrong lol but turned it on yet. The orange and black should be joined as well as the red &yellow.

    Was tired this evening only just come home from work glad i decided to leave it till morning.
    Last edited by Desertboy; 20-11-2017 at 11:28 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 ;)

  6. #355
    Almost there, got some connectors on a din rail for sorting out the wiring to the BOB, still need to solder the capacitors but will get that done tonight. Looking for my holesaw set at moment so I can make the fan holes in the enclosure.

    Click image for larger version. 

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    The non working AM882 isn't bolted down just there for reference.

    I have got a current inrush thermistor which hopefully is the right one if it cause problems I'll ditch it but it was £2 so I thought worth a punt. Hopefully with one fitted I can then use a type B mcb which I can just fit in the box ;)

    I now feel it's starting to look like cnc electronics ;)
    Last edited by Desertboy; 22-11-2017 at 05:41 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 ;)

  7. #356
    Got the capacitors soldered on a 2nd time, ready to test output voltage, need to get my mate tonight and borrow his hole saw so I can fit the fans and he's helping mount the box and the wires can be connected ;)

    Click image for larger version. 

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    Now I need the new AM882 was quoted 10 working days delivery tomorrow is the 10th day :(

    Ordered
    one of these
    http://www.ebay.co.uk/itm/230689466731

    So I can fit it inside the box and take the mains in from the same feed as the transformer. Then I can wire first to a junction then on to the pc fans and BOB. This way if the toroidal transformer is one then the fans are running and less leads coming into the box.

    I hope 1amp is enough, PC fan's are ~0.2amp I guess it doesn't need much to generate the control signal for the vfd.
    Last edited by Desertboy; 23-11-2017 at 09:24 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 ;)

  8. #357
    Can I wire the stall detection output from 1 AM882 to the next then the last AM882 in the chain to the BOB?
    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 ;)

  9. #358
    Short answer - no!

    Longer answer - the AM882 use an open-collector output. Think of it as being a normally-open switch that closes when there is a fault (like a stall). What you can do is wire them all in parallel and then to the BOB input. I do this with the EM806 on my machine and it works fine.

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  11. #359
    Click image for larger version. 

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    A little bit closer, ready to mount the box and start running the motor's and home switches. Need to mount the VFD as well so I can run the wiring 12v adapter won't be here till Monday.

    Need holesaw for the fans mate has my cheapo set so going to see him tonight little bastard keeps forgetting it.
    Last edited by Desertboy; 24-11-2017 at 07:20 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 ;)

  12. #360
    Does this look correct it's the pulse and dir +'s connected to BOB pc 5v

    Click image for larger version. 

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    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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