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  1. #1
    Join Date
    Mar 2004
    Posts
    576

    Stepper connector

    Hi all,

    Where do I find decent-priced connectors for my stepper motors? I found these at digikey.com ... SC1182-ND and SC1162-ND, but they're only rated for 20-gauge wire and I'm thinking I should use something heftier like 16-gauge -- just gut feel for a 4-to-5-ft run from controller to motor.

    Any better sources? Also, while I'm at it, any sources for nice flexible multi-conductor wire.

    Cheers,
    -Neil.

  2. #2
    Join Date
    Feb 2007
    Posts
    4553

    Smile

    Neil,

    Take a look at the 9W4 connector, they make pins for 10 thru 40 amps.

    http://www.mouser.com/catalog/636/1235.pdf

    Jeff...

  3. #3
    Join Date
    Mar 2004
    Posts
    576
    Hmmm... nice connector, but I was hoping to find something inline, and sealed to protect against all sorts of oils/fluids. Where is everyone else getting the round connectors, that I keep seeing on pics of CNC conversions?

    Cheers,
    -Neil.

  4. #4
    Join Date
    Apr 2005
    Posts
    101

    null connectors, may be

    Dear Neil:

    I have an extreme suggestion: why not using no connectors at all?

    I believe connectors are one of the troublespots in our machines,
    specially if used with steppers, which draw a considerable amount
    of current and, if one wire gets loose, can cause a driver to blow.
    If you try to find a decent, locking, high current connector you will
    see they are unreasonably expensive.

    So, I decided on a radical approach: NO connectors for the steppers:
    the wires are soldered near the steppers and I use screw terminals on the
    driver side: very secure (tighten them well, of course) and high current
    capability. After all, you don't have to disconnect them so often...

    Nelson

  5. #5
    Join Date
    Feb 2007
    Posts
    4553

    Question

    Like this?


    http://tinyurl.com/c8fq2p
    Attached Thumbnails Attached Thumbnails mil connector.jpg  

  6. #6
    Join Date
    Mar 2008
    Posts
    3655
    If you put the connectors on the DRIVER end, they don't have to be sealed. Try these:

    You can use THIS wire for motor cables and home/limit switches. Ground the drain wire ONLY at the driver end.

    http://cgi.ebay.com/Servo-Motor-Wire...3286.m20.l1116

    These gold-pin connectors are good and fairly cheap:

    http://cgi.ebay.com/ws/eBayISAPI.dll...%3D4%26ps%3D42

    CR.

  7. #7
    Join Date
    Mar 2004
    Posts
    576
    If anyone ever needed connectors, it would be me -- for two reasons: (1) I seem to move the mill around periodically, and don't want wires dangling off the mill as it adds to the complications moving that beast; and (2) I am now CNC'ing a lathe, and want to use the same PC/controller/driver setup, and swap the connections as necessary. Both machines are very low use, so I'm not worried about

    For (1) above, it would make sense to have the connectors near the steppers.

    Those ebay connectors are just like what I was thinking, though I don't see the the seals/grommets for the wire sides, and ideally it would be a stock shelf item so if I needed spares in the future I could get more. That's what I'm running into now btw -- I can't find extras of the connectors I currently have on the mill (put there by someone else who I bought the mill from).

    I use Amp Mate-n-Lock connectors ( http://dkc3.digikey.com/PDF/T091/P0226.pdf ) for work-related products regularly (and have a bunch in stock), and I discovered yesterday that I can get seals for it. With proper strain-reliefs, this may work well, and I'd use 2 circuits per wire to ensure proper current-handling capacity.

    But a properly sealed circular may make me feel better.

    Cheers,
    -Neil.

  8. #8
    Join Date
    Dec 2005
    Posts
    160
    I Like those import military connectors from ebay I wonder if they are cpc compatible. I just bought 3 size 11 cpc 3 flange mount, plugs and contacts from digikey total cost $50 after you get all pieces needed
    A1301-ND

  9. #9
    For all kinds of connectors, including military connectors snecma--military,medical,industrial connector manufacturer, industrial connectors, connector, I think the connector manufacturer can provide a good solution, but as a general purchasing is issue to consider will be a lot of, because this involves long-term cooperation and stable quality
    military,medical,industrial connectors manufacturer http://ww.sunkye.com

  10. #10
    For circular connector, they have many kinds of about circular connectors, As for you need the circular connector,you can consult our website :http://www.snecma.cc
    military,medical,industrial connectors manufacturer http://ww.sunkye.com

  11. #11
    Join Date
    Sep 2018
    Posts
    6
    Quote Originally Posted by Snecmainfo View Post
    For circular connector, they have many kinds of about circular connectors, As for you need the circular connector,you can consult our website :http://www.snecma.cc
    Snecma Connector changed name to Sunkye International Co.,Ltd, website now http://www.sunkye.com/.

    Looking at Weipu WS series after finding them on an import CNC machine

  12. #12
    Join Date
    Jan 2018
    Posts
    1516

    Re: Stepper connector

    I use aviation GX20 connectors for my nema34 8A with 18AWG wire. Were good price on ebay.

  13. #13
    Join Date
    Mar 2017
    Posts
    411

    Re: Stepper connector

    I use Deutsch connectors. Same one's that are used in the automotive industry. Sealed, oil/heat resistant. Easy to use. You should have a tool to crimp the pins though.

    https://theelectricaldepot.com/deuts...b51ecf69ebdcde

    Attached Thumbnails Attached Thumbnails 2019-12-16 12.34.25.jpg  

  14. #14
    Join Date
    Dec 2003
    Posts
    1206

    Re: Stepper connector

    Quote Originally Posted by dazp1976 View Post
    I use aviation GX20 connectors for my nema34 8A with 18AWG wire. Were good price on ebay.
    i used 4 pin GX16's for my Nema 23s.Other than finding it hard to see the tiny screws that hold them together and having to make a jig to hold them while I soldered the cables in place it worked well.They were rated for more current at higher voltages than I will be using.

  15. #15
    Join Date
    Sep 2019
    Posts
    197

    Re: Stepper connector

    Quote Originally Posted by routalot View Post
    i used 4 pin GX16's for my Nema 23s.Other than finding it hard to see the tiny screws that hold them together and having to make a jig to hold them while I soldered the cables in place it worked well.They were rated for more current at higher voltages than I will be using.
    I used the same one's on my 6040 nema 23's for years. Never had any problems with them....

  16. #16
    Join Date
    Jan 2018
    Posts
    1516

    Re: Stepper connector

    Quote Originally Posted by routalot View Post
    i used 4 pin GX16's for my Nema 23s.Other than finding it hard to see the tiny screws that hold them together and having to make a jig to hold them while I soldered the cables in place it worked well.They were rated for more current at higher voltages than I will be using.
    My X2 machine has Nema23's (5A) with GX16 connectors.
    My PM machine has the Nema34's with GX20's.

    I recommend either.

  17. #17
    Join Date
    Oct 2009
    Posts
    17

    Re: Stepper connector

    Quote Originally Posted by dazp1976 View Post
    My X2 machine has Nema23's (5A) with GX16 connectors.
    My PM machine has the Nema34's with GX20's.

    I recommend either.
    Attachment 440126

    what are these called guys??

  18. #18
    Join Date
    Jan 2007
    Posts
    626

    Re: Stepper connector

    Quote Originally Posted by dazp1976 View Post
    I use aviation GX20 connectors for my nema34 8A with 18AWG wire. Were good price on ebay.
    Also GX16 if you want something a little smaller.

  19. #19
    Join Date
    Apr 2003
    Posts
    540

    Re: Stepper connector

    Good connectors and a good soldering job and you'll never have any issues. I've always been able to find the connectors I needed via amazon or monoprice. I've been happy with the 6 pin 5A aviation connectors. You can get them with a panel mount half that mounts on your control box or on the stepper/servo motor cover and keep things neat.

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