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### Question #: 15421

Question: [4 Conductor 18 AWG SHIELDED Cable] Is this enough rating for a Nema 34 motor with max 6 amps? Also what about a 220V 2200Watt Spindle?

Current Solution

For the NEMA 34 stepper motor with a maximum current of 6 amps, 18 AWG wire would technically be sufficient. According to the American Wire Gauge (AWG) standard, 18 AWG wire can handle up to around 10 amps of current in chassis wiring and around 16 amps in power transmission. If you are considering running a very long length of cable from the driver to the stepper motor, you may want to consider using 16 AWG.

As for the spindle, this wire gauge is well-suited. There are three phase shifts, each at 120 degrees and each conductor is carrying only 1/3 of the power. At 220v, 2200 watts / 220 V = 10 amps. 1/3 of 10 amps is 3.333 amps, so each conductor will be have a load of 3.33 amps.

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### Other Possible Solutions to this Question

• I have a 5hp 3600 rpm 3phs spindle motor will your inverter work for this application 1.5kw?

No. Horsepower is a measure of the rate at which a device can do work, as is the Watt. The conversion ratio is about 746 Watts = 1 Horsepower. Therefore your 5hp motor is equivalent to about 3,730 Watts. The kW designates kilowatts, or units of 1,000 Watts. So a 1.5kW inverter can supply only 1,500 Watts. Our larger inverter supplies 2.2kW, but you need a minimum of 3.7kW for your application.

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I have a 5hp 3600 rpm 3phs spindle motor will your inverter work for this application 1.5kw?

• hi, would like to make a change on my order, i purchase this part 2.2kW Spindle with 220V Inverter \$528.00, and would like to make it for 110 volts instead of 220v. please

Sure, not a problem at all. You will need to call our office and provide your information so that we can change the correct order.

Our phone number can be seen by hovering over the "Need Help?" at the top right of each page.

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hi, would like to make a change on my order, i purchase this part 2.2kW Spindle with 220V Inverter \$528.00, and would like to make it for 110 volts instead of 220v. please

• With a 1/2 lead screw what is the optimal steps for the stepper motor driver 1/16, 1/8, 1/4 etc

We typically use a 1/4 microstepping for lead screws, but you want to determine the microstepping only after you determine what resolution you want on that axis of the machine.

The formula:
Resolution is steps per inch or steps per milimeter

I will go over this using steps/inch:
steps = motor steps x driver microstepping
inch = the amount of travel with one full stepper motor rotation

In the case of our 1/2" 5 start 10 TPI lead screw, the axis will travel .5 inches with one stepper motor rotation.

Let's use 1/4 microstepping (4 microsteps for each stepper motor step)

Therefore:
(200 steps x 4) / .5 inches =
800 steps / .5 inches =
1600 steps/inch

Now let's use 1/2 microstepping (2 mistrosteps)

(200 steps x 2) / .5 inches =
400 steps / .5 inches =
800 steps/inch

Remember that increasing microsteps, the torque is also reduced, but the smoothness from the motor is increased.

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With a 1/2 lead screw what is the optimal steps for the stepper motor driver 1/16, 1/8, 1/4 etc

• BUILDING ONE OF YOUR GREENBULL 6X LONG AND 2.2 KILOWATT SPINDLE DOES NOT FIT. SEEMS LEAD SCREW YOU SENT WITH KIT IS SHORT 42" LOOKS LIKE IT NEEDS TO BE 5 OR 6 INCH LONGER. THIS CORRECT? WHAT THE NEEDED LENGTH FOR UNIT?

The leadscrew length for the greenBull long Z-axis is 47 inches.

Additional Information:

• On the Book Build: I'm changing the 13TPI 1/2" lead screw with the 1/2" 10 TPI Acme screw with the anti backlash nut. This is for the Z axis only. What should I know about installing it and what are the numbers I need to plug into the motor tuning area.

The settings that will have to be change will be your steps per inch in motor tuning (mach 3), or settings/axes(planetCNC). But we do not have the actual numbers/specs that will fit your 10 TPI 5 start lead screw, here is a tutorial video which explains how to get the exact numbers you need! (

).
Here is a default setting that you might be able to tune and adjust accordingly: 1600 steps, accel 400.02, velocity 5.

• I HAVE A 2.2KW WATER COOLED SPINDLE WITH YL620-H VFD. THE VFD USES P#-## PROGRAM FORMAT. BELIEVE ALL CORRECT SETTINGS SETUP BUT WHEN TURN UNIT ON, IT SPINS AT ABOUT 200-300 RPM REGARDLESS OF WHAT FREQUENCY CHOOSE. DO YOU PARAMETERS IN THIS FORMAT FOR UNIT? THANK YOUR HELP. HUIBERT MEES

You will need to look for the parameter that controls the run frequency. The frequency can be controlled bu the panel, external terminals, or the RS485 TX/RX terminals (UART protocol). You will want to change that parameter so it uses the panel. If you are referring to the maximum panel dial frequency is only allowing 200-300 rpm, then look for the parameters to control the frequency.

For 200 RPM:
Hz = 200/60 = 3.33 Hz

For 300 RPM:
Hz = 300/60 = 5 Hz

Conversion to RPM:
If you ever find yourself yearning to reverse-engineer the process, the formula is as follows:

RPM = Hz × 60

Look for values that match somewhere between 3 and 5 in your frequency parameters and replace them with 400 to give you 24,000 RPM max.

• What is the number of pole pairs and rotor inertia for NEMA 23 Stepping motor?

You can find the wiring diagram, and technical specifications for the NEMA 23 motor, on it's product page, found here,

https://www.buildyourcnc.com/Item/electronicsAndMotors-nema23-100ozin-newbiehack-motors-stepping_motors-100_ozin

There is a datasheet below the product description. This image will expand to be easier visible once clicked on.

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What is the number of pole pairs and rotor inertia for NEMA 23 Stepping motor?

• Building one of your greenBull 6X Long and 2.2 kilowatt spindle does not fit. Seems lead screw you sent with kit is short 42" looks like it needs to be 5 or 6 inch longer. Is this correct? What is the needed length of lead screw for this unit?

The leadscrew length for the greenBull long Z-axis is 47 inches.

Additional Information:

• I PURCHASED A VFD AND SPINDLE FROM FRIEND, HIS SET UP IS 220. DON'T HAVE 220 IN MY SHOP. QUESTION CAN USE YOUR 110 WITH THIS SPINDLE??

Depending if the spindle can work with this specific VFD, it might be possible. However we would not like to risk you working unit, with a possible match so we would like more details on your specific model and any information available on the spindle itself.

Response
The only info on the spindle is 2.2KW 400HZ 220V. Made by Zhong Hua Jiang.

Was originally on a Delta C200 vfd. That is 220 single phase.

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I PURCHASED A VFD AND SPINDLE FROM FRIEND, HIS SET UP IS 220. DON'T HAVE 220 IN MY SHOP. QUESTION CAN USE YOUR 110 WITH THIS SPINDLE??

• What is the minimum RPM for the 2.2 kW spindle? Info on spindle page says 0-24,000. Elsewhere in this knowledge base it says 6000. My edge finder has a1500 RPM limit.

The lowest Hz for a 2 pole 2.2kW spindle is 250 Hz. That works out to 15,000 RPM. If you need lower RPM, a separate spindle will be required. This is typical for industrial CNC machines where spindles are changed out to mill on different materials.

Additional Information:
Thank you for the reply.

Does that mean the 2.2 kW spindle sold by BYCNC is a 2-pole, not a 4-pole? There don't seem to be specs on the website for the 2.2 kW spindle.

I currently have the 1.5 kW spindle from BYCNC and can run from 0-24000. 1500 is no problem. I never mill at that low of a speed, just use the edge finder to set the workpiece coordinates.

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What is the minimum RPM for the 2.2 kW spindle? Info on spindle page says 0-24,000. Elsewhere in this knowledge base it says 6000. My edge finder has a1500 RPM limit.

• [55] My Nema 34 motor has different wiring colors, black blue red green instead of what is shown here. How do I wire it.

Can you tell me the part number of the motor?

An easy way to determine the coil pairs for 4 wire stepper motors (open-loop stepper motors only) is to connect two of the wires and try to spin the motor by hand. If the motor shaft turns with difficulty, those two wires belong to one of the coils. You can insert those two wires into the A+ and A- and the other two wires to B+ and B-. If the motor spins in the wrong direction, then you can either swap the two pairs at the driver, or toggle the "DIR active low" or "DIR Invert" in the CNC control software for that axis.

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[55] My Nema 34 motor has different wiring colors, black blue red green instead of what is shown here. How do I wire it.

• 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?

• i have a 4 axis cnc need to replace everything electronics and motor nema 34 what do i need to buy

To replace all of the electronics for a 4 axis system with all NEMA 34 motors, you will need the following components:

4 NEMA 34 stepper motors:
https://buildyourcnc.com/item/electronicsAndMotors-nema34-651ozin

4 drivers (one driver for each motor):
https://buildyourcnc.com/item/electronicsAndMotors-stepper-driver-6!0a

One controller:
https://buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

24v Powers supply for the controller:
https://buildyourcnc.com/item/electronicsAndMotors-power-supply-24v-1a-dc

2 48V power supplies for the motors and drivers:
https://buildyourcnc.com/item/electronicsAndMotors-power-supply-24v-36v-48v

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i have a 4 axis cnc need to replace everything electronics and motor nema 34 what do i need to buy

• What is the difference between a NEMA 23 and NEMA 24 motor? can I use either one on a machine?

The frame size difference of the NEMA 23 and 24 is very slight and, depending on the motor mount both will most likely fit. The bigger difference between these stepping motors is the torque. Make sure that the motor that you purchase has the appropriate torque for the axis that it will move.

Is is safe to go with the higher torque? Or if the torque is too high for what i need is that bad?

You can use a motor with higher torque. Just make sure to select the correct driver for that motor.

Additional Information:
The frame size has nothing to do with torque. Nema 23 means a 2.3" frame. Nema 24 means a 2.4" frame. That's all. Either could have more or less torque depending on speed and power.

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What is the difference between a NEMA 23 and NEMA 24 motor? can I use either one on a machine?

• What is the difference between a NEMA 23 and NEMA 24 motor? can I use either one on a machine?

The frame size difference of the NEMA 23 and 24 is very slight and, depending on the motor mount both will most likely fit. The bigger difference between these stepping motors is the torque. Make sure that the motor that you purchase has the appropriate torque for the axis that it will move.

Is is safe to go with the higher torque? Or if the torque is too high for what i need is that bad?

You can use a motor with higher torque. Just make sure to select the correct driver for that motor.

Additional Information:
The frame size has nothing to do with torque. Nema 23 means a 2.3" frame. Nema 24 means a 2.4" frame. That's all. Either could have more or less torque depending on speed and power.

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What is the difference between a NEMA 23 and NEMA 24 motor? can I use either one on a machine?

• Do you offer or can recommend a place where I can buy the Drive Pulley for NEMA 43 Stepper Motor (1586 oz-in 3/4" single shaft) 5.5 Amps?

We don't offer those drive pullies with a 3/4" bore at the moment. We can supply them if you are willing to wait. If so, what is the pulley pitch, how many teeth and the width of the belt.

Additional Information:
Meant to say pulleys, not pullies.

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Do you offer or can recommend a place where I can buy the Drive Pulley for NEMA 43 Stepper Motor (1586 oz-in 3/4" single shaft) 5.5 Amps?

• [596] I am new to CNCs, curious to know what I need to look for in a pendant that would be compatible with this board and Mach4?

I recommend using a wireless pendant rather than one that is wired to the controller.

Here is a link to one on Amazon.com: https://amzn.to/3r3AfTm

This is an affiliate link.

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[596] I am new to CNCs, curious to know what I need to look for in a pendant that would be compatible with this board and Mach4?

• Hi I want to build a cnc laser table 13'x15' cuttting area. Is this feasible. Also would the 80watt laser be enough power to cut through carpet

Yes, it is feasible to create a machine with a cutting area of 13'x15'. Your mechanical and structural systems will need to be able to span a bit more than the 13' if that will be the axis travel along the gantry.

We have not cut carpet with our lasers, but I don't see why not. With that said, be extremely careful with the materials in the rug. Read the MSDS (Material Safety Data Sheet) for the rug you intend to cut as some materials will emit corrosive and harmful gases and chemicals when lased.

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Hi I want to build a cnc laser table 13'x15' cuttting area. Is this feasible. Also would the 80watt laser be enough power to cut through carpet

• I have NEMA 34 motors for a GreenBull 6x12. After 2 weeks of use, my Y axis motor has developed play in the front but not rear of the motor. Is this a motor defect or has something come loose somewhere? Thanks,

If there is play within the motor itself, then that motor may be defective. Call us to provide us more detail on this issue.

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