Newbie 3.5 Spindle wire


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    Default 3.5 Spindle wire

    What is the recommended shielded wire from the VFD to the spindle if I have a 3.5kw 220v? I think its 15amp?

    I cant find sh@t on 3.5 spindle wiring.

    Thank you
    Jason

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    Default Re: 3.5 Spindle wire

    McMaster Carr 7777T21

    Igus CF31

    Gerry

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    Default Re: 3.5 Spindle wire

    I just bought some Igus CF6 14-4 for my new spidle, 20ft. ran me about $80 delivered.

    https://www.igus.com/product/950

    Adam,

    G540, Rack and Pinion Drives-X/Y axis, 1/2-Ball Screw-Z Axis w/THK HSR 25 Linear Slides, Steppers KL23H2100-35-4B, Power Supply-KL-600-48


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    Default Re: 3.5 Spindle wire

    Depending upon power factor and just looking at input power to the motor, current could easily range from 9 to12 amps. Plus we don’t know if the motor is rated for output power and thus the possibility of efficiency being a factor.

    In any event the NEC requires all electrical motors to be rated with all the data you need. In this case you need the phase current value. It is likely well under 12 amps so 14 gage wire would do. If the current rating approaches 14 amp I’d upgrade to a 12 gage cable. A decent cable suitable for drag chain usage is a bit expensive but worth every penny.

    By the way this assumes running a 3 phase cable to the motor from the VFD. A single phase run requires a 12 gage cable.



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    Default Re: 3.5 Spindle wire

    Single phase



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    Default Re: 3.5 Spindle wire

    Perfect, went with 12g.

    Thank you



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    Default Re: 3.5 Spindle wire

    A VFD implies 3 phase wire to the motor.



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    Default Re: 3.5 Spindle wire

    This is the model I have.

    DZB200B003.7L2A 220 3.7 220V 50/60Hz 0~200V
    0~600Hz 15


    Oops, read back a bit... Got ya

    Last edited by JasC; 12-10-2018 at 04:11 PM.


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    Default Re: 3.5 Spindle wire

    Hmm I already posted this but it didn't take.

    I need to figure out the VFD to spindle and to controller wiring.
    How do I check ohms on the spindle? Its has 1-4 and a grd.
    VFD to spindle from UVW?
    Controller to VFD RST?
    Control has a 3 pin out 1=24v, 2=gnd, 3=0-10v?
    Any insight would be great. I cant find the manuals for these anywhere.

    Thank you

    J



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    Default Re: 3.5 Spindle wire

    Quote Originally Posted by wizard View Post
    Depending upon power factor and just looking at input power to the motor, current could easily range from 9 to12 amps. Plus we don’t know if the motor is rated for output power and thus the possibility of efficiency being a factor.

    In any event the NEC requires all electrical motors to be rated with all the data you need. In this case you need the phase current value. It is likely well under 12 amps so 14 gage wire would do. If the current rating approaches 14 amp I’d upgrade to a 12 gage cable. A decent cable suitable for drag chain usage is a bit expensive but worth every penny.

    By the way this assumes running a 3 phase cable to the motor from the VFD. A single phase run requires a 12 gage cable.
    You are getting a little carried away with your cable size, these quality cable that most are using 16gage is rated for 20Amps

    Mactec54


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    Default Re: 3.5 Spindle wire

    Quote Originally Posted by JasC View Post
    Perfect, went with 12g.

    Thank you
    No point in using 12gage if it won't fit in your plug post some photos of what your spindle or motor connection has, you can't just buy any sort of cable and expect it to work for you

    Mactec54


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    Default Re: 3.5 Spindle wire

    Its is large and will fit I checked. Second its shielded for this type use.

    J



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