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Question #: 3592

Question: What wire size between voltage converter and VFD?

Current Solution

Please consult the advice of a professional electrician. The information provided below should always be confirmed by a professional electrician and you assume all risk involved when working with electricity which is potentially hazardous and lethal. Never work with instruments and wiring on live electricity.

The wire gauge used between the spindle VFD and the wall socket, or voltage converter will be determined by the current consumption of the VFD. For example, if the spindle/vfd is rated for 2.2kW and the voltage input is 220V, then 2200W/220V = 10 amps. In this case, it's best to increase the gauge for a current flow to provide a safety factor and consider 15 amps rather than 10 amps. A wire gauge that is too small will cause overheating on the wire and possibly cause the insulation to melt and cause a short. A wire gauge of 14 (copper wire) for 15 amps would be adequate. Remember that the length of the wire is important. The longer the wire, the larger gauge is needed.

It will be very short wires. Maybe 12" long.

14 AWG should be fine.

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Other Possible Solutions to this Question

  • What length of wire do you recommend for the black toe (2'x4') between the spindle and VFD?

    The length of the cable from the VFD (Variable Frequency Drive) to the actual spindle should be about the same as the z-axis cable from the z-axis motor to the z-axis driver which is recommended at 11 feet. This is locating the VFD about at the midpoint of the machine.

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    What length of wire do you recommend for the black toe (2'x4') between the spindle and VFD?

  • What kind of wire should I use between the invertor and the spindle?

    The type of wire that should be used between the spindle and the VFD (Variable Frequency Driver also called the inverter) should be of stranded type and we use between 18 and 16 AWG.

    The total current is divided among the three coil wires, therefor a wire gauge of 16 should be sufficient.

    Currently we use 20AWG 4 conductor.

    Additional Information:

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    What kind of wire should I use between the invertor and the spindle?

  • wire size to connect Frequency converter to 2.2 KW Router?

    We use 16 AWG (American Wire Gauge) to connect the 2.2kW Spindle to the VFD (Variable Frequency Drive also called the inverter. Since there are three coils, the 2.2kW (2200 watt) spindle will draw 10 amps total or 3.33 amps per coil. 16 AWG will be more than enough capacity to handle 3.33 amps.

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    wire size to connect Frequency converter to 2.2 KW Router?

  • How do you wire the connection between the vfd and the pokoys57cnc breakout board?

    The Pokeys57cnc board: https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach4-mach3-USB-ethernet-Board

    This board contains a 0-10V output at pin #17 that can be connected to the spindle's VFD 0-10V input. On the VFD, this terminal is typically called AI0 or above.

    Pin #14 on the Pokeys57cnc board can also be used as a spindle error input.

    The Galvanically isolated I/O section of terminals on the Pokeys57cnc board (which also contain the pins 14 and 18, can be used to serve as the on/off for the spindle/VFD using the VFDs digital input.

    Click the link to respond:
    How do you wire the connection between the vfd and the pokoys57cnc breakout board?

  • What wire size to use from VFD to 2.2kW spindle?

    We use 16 AWG wires between the spindle and the VFD. This wire size has a maximum capacity for 22 Amps, a good buffer to eliminate any possibility for overheating. The 2.2kW using 220V may draw up to 10 Amps (220 x 10 = 2200).

    That is, all three wires are sharing the total current draw.

    Additional Information:


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    Additional Information:
    grounding a spindle


    Additional Information:

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    What wire size to use from VFD to 2.2kW spindle?

  • Is 1000W voltage converter (110V to 220V) enough for 2.2kW spindle?

    Ideally, the spindle VFD should use an actual 220V socket that contains the minimum amp fuse that will allow the appropriate draw for all of the items that will be plugged into that socket. If you elect to use a boost converter, the 2.2kW spindle VFD will need a 2200 watts or more.

    My brother is using 1000W and told me his spindle is working just fine. Is it safe to use 1000W ?

    I still can't recommend using a 1000W converter.

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    Is 1000W voltage converter (110V to 220V) enough for 2.2kW spindle?

  • What size of wire do you use to connect the VFD to the spindle?

    The type of wire that should be used between the spindle and the VFD (Variable Frequency Driver also called the inverter) should be of stranded type and we use between 18 and 16 AWG.

    The total current is divided among the three coil wires, therefor a wire gauge of 16 should be sufficient.

    Currently we use 20AWG 4 conductor.

    Additional Information:

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    What size of wire do you use to connect the VFD to the spindle?

  • What gauge wire between the VFD and the 2.2K spindle? The spindle connection posts are very tiny, equivalent to 18 gauge, but that seems too small. What do you use?

    The type of wire that should be used between the spindle and the VFD (Variable Frequency Driver also called the inverter) should be of stranded type and we use between 18 and 16 AWG.

    The total current is divided among the three coil wires, therefor a wire gauge of 16 should be sufficient.

    Currently we use 20AWG 4 conductor.

    Additional Information:

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    What gauge wire between the VFD and the 2.2K spindle? The spindle connection posts are very tiny, equivalent to 18 gauge, but that seems too small. What do you use?

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  • What's the difference between the redLeaf and redSprout?

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  • WHAT COMMON BETWEEN KUTTY, SHANKAR, LAXMAN AND SUDHIR DAR?

    Drawing Cartoons

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  • What is the difference between 18/8 and 18/10 stainless steel?

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    What is the difference between 18/8 and 18/10 stainless steel?

  • What is the difference between 18/8 and 18/10 stainless steel?

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    What is the difference between 18/8 and 18/10 stainless steel?

  • WHAT IS THE DIFFERENCE BETWEEN A PRINTER CABLE PORT AND USB MOTOR KITS

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    WHAT IS THE DIFFERENCE BETWEEN A PRINTER CABLE PORT AND USB MOTOR KITS

  • WHAT'S THE DIFFERENCE BETWEEN PARALLEL BREAKOUT BOARD AND USB ITERFACE?

    The parallel (printer cable) port is uses the computer as its main source of pulse trains to operate the motor driver directly. Parallel ports are a direct connection from the processor commonly referred to as GPIO pins (General Purpose I/O pins) and provides a convenient and powerful way to interface with the computer. The parallel breakout board is included in those kits only to condition those signals for use with the drivers.

    The USB serves at the actual controller, sending the pulse trains, but the computer sends simple human readable instructions to the USB controller to tell the controller how to send pulses.

    The non-technical differences that may serve as the most important information to you is that the parallel configurations allow for a wider variety of industry standard software that can be used to control the cnc machine. The USB that we offer requires the operator to use a software called Planet-CNC software which is a very well made and feature full cnc control software.

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    Additional Information:

    Click the link to respond:
    WHAT'S THE DIFFERENCE BETWEEN PARALLEL BREAKOUT BOARD AND USB ITERFACE?

  • What's the difference between 128 microstepping and 1-1/64 microstepping?

    I'm not sure what particular devices you're talking about so I can't help you as far as compatibility goes, but a microstep fraction refers to the resolution of the rotating motor. let's say your motor takes 200 whole steps to make one complete revolution of the spindle. If you then set your motor to run at 1/64 microsteps it would mean your motor is taking 64 times more steps to cover the same distance, making a total of 12,800 steps to make one complete revolution of the spindle. So a smaller fraction of steps like 1/128, would take even more steps to complete one revolution, 25,600 in fact.

    If you're talking about motor drivers it's probably telling you how many options of resolution you have.
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    The amount of microsteps you want to make in one revolution is totally up to you, more steps potentially means a more precise machine, but at a certain point the extra steps may be unnecessary.

    hope this helps

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    What's the difference between 128 microstepping and 1-1/64 microstepping?

  • What's the difference between 128 microstepping and 1-1/64 microstepping?

    Stepper motors are designed to move in specific increments; these increments are called "steps". For example, a common standard is for 200 steps per full revolution. Microstepping is a method to send signals to the motor to move only a fraction of a full step at a time. For example, if a motor has 200 steps per revolution and is microstepped 1/16, then effectively there are 3200 small step movements (microsteps) per revolution instead of 200 larger ones. This makes the motion of the motor much smoother and more precisely controllable, at the cost of decreased holding torque.

    Here are is a good references for stepper motor theory: http://users.ece.utexas.edu/~valvano/Datasheets/StepperMicrostep.pdf

    And Wikipedia has a good overview as well:
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    Additional Information:
    Therefore, the difference in 128th and 64th microstepping is increased resolution and smoothness for 128th microstepping, at the cost of decreased holding torque.

    Click the link to respond:
    What's the difference between 128 microstepping and 1-1/64 microstepping?

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