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Question #: 3609

Question: Which 3 axis combo pack should I order to replace my millstar3 motors on my full size knee mill

Current Solution

Measure the frame of the motors and the length of the motor. This should give a good idea on the type of motor and the torque. If you know the torque, please provide this information as well.

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Other Possible Solutions to this Question

  • I bought your 3 axis combo and need to know what name brand is the motors and their ounces and the drivers

    Surely you know the brand motors you sold me?

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    I bought your 3 axis combo and need to know what name brand is the motors and their ounces and the drivers

  • Your combo kits don't specify whether they are standard NEMA motors. I need Nema 34 with a .375 shaft diameter. Which 3 axis kit work for these requirements?

    We currently do not have any Nema motor's with a .375"/3/8" shaft diameter. The motors in stock 100 oz, 425 oz, with a 1/4" input shaft. Our 651 oz, with a 1/2" input shaft.

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    Your combo kits don't specify whether they are standard NEMA motors. I need Nema 34 with a .375 shaft diameter. Which 3 axis kit work for these requirements?

  • what do i need to buy for a complete replacement 4 axis cnc mill nema 34 motors mach 3

    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

    Click the link to add information to this solution:
    what do i need to buy for a complete replacement 4 axis cnc mill nema 34 motors mach 3

  • What wiring should I use to connect two motors for one axis?

    Yes, you can use 2 motors in the same axis output, however you will still need a driver for that motor! Also depending on the orientation on which you mount the motor you might have to invert the direction of the motor, and that will be simple by swapping the A+,A-, to the B+,B- locations and vice versa, from the driver to the motor wiring.

    Also you can run a slave motor using another axis on the board, and setting it up in the Planet-CNC settings.

    Planet-CNC/File/Settings/Axes, here you will enter 3 in the Number of Axes location, and then change the Function of the Axis 4 to Slave 1. There you will have the 4th axis or A-axis be a slave for the x-axis.
    Slave 1 - X-Axis
    Slave 2 - Y-Axis
    Slave 3 - A-Axis
    Slave 4 - B-Axis
    Etc...

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    What wiring should I use to connect two motors for one axis?

  • Which end mill would you advise to buy for cutting in full depth MDF and plywood of up to 20mm thickness? I am about to install a 2.2k spindel on my cnc.

    There are several endmills that would work for that application. Here's the one we use in our own shop: https://buildyourcnc.com/Item/endmill-singleflute-upcut-Onsrud-1-flute-plastic-wood-aluminum for cutting .75 inch MDO.

    Click the link to add information to this solution:
    Which end mill would you advise to buy for cutting in full depth MDF and plywood of up to 20mm thickness? I am about to install a 2.2k spindel on my cnc.

  • if buy a 3 axis cnc combo, which software would I need for working this combo?

    if you purchased the USB interface, you will need planet-cnc software rather than Mach3, and you will need a usb cable to connect the usb interface to the computer.

    The blackToe 2x4 CNC Machine Kit with optional table will need wire to connect the electronics. Don't forget to get some end mills to use for cutting the intended material.

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    if buy a 3 axis cnc combo, which software would I need for working this combo?

  • When Blacktooth is powered on the motors get power but will not turn. What should I do?

    The motors could be wired incorrectly causing them to lock up. Make sure to check the wiring to make sure the X and Y are connected to the correct terminals.

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    When Blacktooth is powered on the motors get power but will not turn. What should I do?

  • For tuning the motors in mach 3 should I be running a gcode or is keyboard jogging enough to determine the stall rates

    It seems to be getting some kind of interference or a short within the wiring or communication, try jogging the motors in the software without anything wired to the board. Then add one motor at a time to see if there is a short within your wiring or a faulty driver/motor.
    If the USB breakout board continues to move the x-axis with no motors or driver wired to it, please email customerservice@buildyourcnc.com for a replacement or further troubleshooting.

    Click the link to add information to this solution:
    For tuning the motors in mach 3 should I be running a gcode or is keyboard jogging enough to determine the stall rates

  • For tuning the motors in mach 3 should I be running a gcode or is keyboard jogging enough to determine the stall rates

    Keyboard jogging will give you a good start at motor tuning since going from a stop to rapid travel speed is the quickest the machine will be required to accelerate. However, best practice is to also run test files and actually cut the type of materials you expect to deal with to test machine performance under load and make any fine adjustments needed for maximum performance.

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    For tuning the motors in mach 3 should I be running a gcode or is keyboard jogging enough to determine the stall rates

  • I have my motors wired like the wiring diagram I have two motors on Y axis how do I wire the second motor

    To move two stepper motors simultaneously with the same signal, simply wire the two stepper motor drivers to the same interface board signal terminals (CP and CW).

    Additional Information:
    using a ardino uno controller and a cnc sheild on top of that how to wirer 2 motors to 1 axis its the x axis ?

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    I have my motors wired like the wiring diagram I have two motors on Y axis how do I wire the second motor

  • 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

    Click the link to add information to this solution:
    i have a 4 axis cnc need to replace everything electronics and motor nema 34 what do i need to buy

  • I am using you reliable builder, though i am building from scratch. Can you help me size motors to my construction?

    Sure, please describe the machine that you are building and the material with which the gantry and other parts will be built.

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    I am using you reliable builder, though i am building from scratch. Can you help me size motors to my construction?

  • I'm looking to upgrade my X-Carve with one of your vfd spindles, can you reccomend which one to use to replace the dewalt 611 router?

    If you would like to replace a router that outputs a relatively low HP (horse power) such as the Bosch PR20EVSK or Dewalt 611, both having about 1-1.25 HP, the 1.5kW spindle would have more than enough power and will also provide constant torque where the routers are unable to achieve. The 1.5kW spindle outputs 2 HP and is water cooled to keep the dust out of the air!

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    I'm looking to upgrade my X-Carve with one of your vfd spindles, can you reccomend which one to use to replace the dewalt 611 router?

  • WHAT CAUSES ONE OF MY TWO AXIS MOTORS TO STOP WHILE THE MACH3 PROGRAM IS STILL RUNNING

    If one of your stepper motors decides to stop moving and the others are moving during a CNC milling or laser cutting job, then there could be two things that could be causing this.

    - The motor found its limiting torque (usually comes with a not-so-pleasant sound). This is where the control software is trying to move the stepper motor too fast (velocity, or too fast too quickly, acceleration) and the load against the stepper motor (inertia of the machine, or the material against the end mill while milling). Recommended action is to lower the velocity and/or acceleration, and/or lower the feedrate when cutting.

    - There is a wiring issue with the wiring from the driver to the motor. This could be a loose wire, or a chafed wire (or two shorting together). It can also be a loose digital wire from the controller board to the driver. Sometimes wire ties can be the culprit. Recommended action would be to thoroughly inspect the wiring.

    It's probably not the limit switches since that would cause a stop to the entire motion of the cnc router or laser machine.

    Sometimes Mach3 will show a status when something goes wrong, but in cases where the motor is stopping due to its torque limit, then that would not be shown in the status. It's always good to check it anyway.

    Additional Information:
    I need to clarify my situation a little better after going to my shop and trying to run another program on Mach 3. About 15 minutes into the milling process all the motors (2-X axis, Y axis and Z axis)stop but the program continues to run. I stop the program and after a couple of minutes when I try to restart the program all the motors start working again. Then after another 15 minutes or so, all the motors stop again. I checked and rechecked my wiring. This has never happened to me before when running the same programs with the same setups and motor speeds. All of a sudden when I reloaded a program I successfully used before it does this. Do you have any recommendations?

    Additional Information:
    Yeah, it sounds like a more complex issue. Have you tried running in the air without using the spindle. This may be a power related issue.

    Additional Information:
    That's exactly what I did. I ran the program without the router motor on just to see if the motors would get through the whole program but they stopped working after about fifteen minutes and then I was able to start them again after about 3 or 4 minutes. I never had this problem before so you can imagine my frustration especially after ruining a couple of projects on expensive material.

    Additional Information:
    Sure. I can completely understand. Try this: disconnect all but one of the driver from power and digital connection and do the air run. Repeat this for each driver and note your findings. This will rule out the drivers causing a power failure.

    Also, is your stepper motors and drivers on a separate power circuit from the computer?

    Additional Information:
    I will try disconnecting each driver and digital connection, which will be a real pain because it will be hard to access.

    All the stepper motors, drivers and computer are plugged into the same power strip.

    Additional Information:
    Ok, so there is no power failure going on, but I believe it is necessary to test each stepper motor and driver pair individually. Hopefully that will lead to a conclusion.

    Additional Information:
    It will take a little time but I will do it and report back on my findings.

    Additional Information:
    Curious, what machine is exhibiting this problem?

    Additional Information:
    I purchased a BYCNC kit back in 2009 with an approximate cutting area of 2' X 4'. I later changed out the Z-Axis Motor and controller for a larger one and have two X-axis motors and controllers. In 2010 I rebuilt the machine out of birch plywood instead of the particle board that the kit supplied. I sent Patrick pictures to him. The machine never gave me a problem till now.

    Additional Information:
    Thanks for the update. This is Patrick by the way. I answer pretty much all of the Customer Service questions. That machine has given quite a good history.

    Additional Information:
    I love the machine and made a number of samples of my work for my e-commerce site, but I can't start selling product until I know this problem is solved because I will not be able to fulfill orders. I finally got all the electronics out of its enclosed protected area near the machine so that I test each controller as you recommended. I hope the problem can be rectified. Will let you know.

    Additional Information:
    Thanks.

    Additional Information:
    I tested each stepper motor and driver pair individually and they worked so what might be the next step?

    Additional Information:
    Did each stepper motor driver pair work for the full +15 minutes?

    Additional Information:
    Yes, I had them in operation for over 30 minutes.

    Additional Information:
    Ok, well it’s good that the motors and driver are ok. We are now down to the power supply and the breakout board as possible causes for the stop. I have a feeling it may be the power supply where with all three drivers drawing current and the power supply maybe getting too hot. Is the fan in the power supply working? You can also test to see if there is 36 volts on the power supply voltage output (V+ and V-).

    Regarding the breakout board, if you have an oscilloscope, you can test if the driver pulses are outputting, but I would consider this as a last resort after you determine if there is a problem with the power supply.

    Additional Information:
    I tested the power supply with a voltmeter and each output was registering 39-40 volts. I think the problem may be the g-code. I am using V-Carve pro to do design and output to Mach 3 Mill g-code. When I studied the g-code lines I noticed that further into the program the z-axis g-code stopped zeroing out to move to the next part of the carving. In other words both the x and y keep moving and the z just stopped working because there was g-code missing. I think something is missing when the design was converted to g-code. I noticed that when I ran a simpler project it worked without problems so I need to investigate this further.

    Additional Information:
    New Update, Its not the g-code. I started to run the long program and everything was working fine until about 45 minutes into it, all the motors stopped working (but the program was still running) and there was a high pitched hum. When I put my hands on the motors they were all trying to move but it seemed they were all stalled. I turned the power off, gave it a minute and when I turned it back on I was able to move the motors again. Could this be a power supply problem?

    Additional Information:
    It does sound more and more like a power supply problem. Did you test the power supply after the motors stopped?

    Additional Information:
    No, I did not. What should I be looking for.

    Additional Information:
    It’s good that you know the voltage during normal operation, so you have a base understood. If the power supply is the problem, the voltage will be reduced or non existent when measured after the problem.

    Additional Information:
    Also, check to see if the fan is running on the power supply when the motors stop. That may (not absolutely) be an indication.

    Additional Information:
    I'll run another test, check the voltage and fan when the problem occurs and let you know. Thanks for hanging in there with me as we try to resolve the problem.

    Additional Information:
    It’s my pleasure. This service is rarely used and is faster then email. Odd nobody uses it. Any recommendations you can give would be great. No problem using this FAQ to pose ideas as this resolution will be cleaned up later.

    Additional Information:
    It might be that people do not realize you can communicate through the sight like this because they are so used to e-mail and texting. You may want to explain this feature in the customer service section.

    I ran the program this morning and it did not take long before the motors stopped. While operating the voltages for all three motors was 46 volts, when the motors stalled (and again there was a high pitch hum) the voltage went up to 60 volts and the fan on the power supply was operating.

    Additional Information:
    So, the driver work individually, but not all together. There is a high pitch sound when the motors fail. You have noted 60 volts from the power supply and the supply fan remains on. This is a difficult issue to resolve, but it seems to me that your power supply may be bad. The 60v measurement tells me that the current dropped and ohms law tells us that is current drops, volts will rise if the resistance stays the same.

    Additional Information:
    As one last test I am going to test each driver again and let them go through the entire program because it seems that the failure can occur at the beginning or towards the end of the program. When I originally tested ach driver I let them run for about a half an hour and the program takes over an hour to run completely. I just want to make sure that it is not the drivers. I will report back when I finished but as you noted it may be the power supply but I want to make sure.

    Additional Information:
    That’s a great idea.

    Additional Information:
    I just ran the x-axis through the whole program and there was no problem especially since I have two NEMA 23 motors moving that axis. Before I check the Y and Z could having a NEMA 34 on the Z axis with appropriate controller be a problem. I used the larger motor on the z axis because the router I am using is a large 1 1/2 hp. I've run this program in the past with this set-up and have not had a problem.

    Additional Information:
    Having a, say 3.0 amp driver, driving a stepper motor that typically requires a 6 amp driver would not seem to be an issue since the driver is limiting the current draw, but the driver may not be able to handle larger coil and back EMF with the protection on the 3.0 amp driver. With that said, I don’t believe that is the issue in this case.

    Additional Information:
    I don't either because I was able to run this and other complicated programs with this set-up in the past. I will let you know on the y and z axis.

    Additional Information:
    Thanks

    Additional Information:
    I ran the Y axis and z axis separately through the entire program and there was no stopping or problem. I guess the culprit is the power supply and I'll order a new one and hope that resolves the problem.

    Additional Information:
    Yes, that is the most probable cause. Please keep me informed. Thanks!

    Additional Information:
    Received and installed the new power supply. I ran the program with the router on and it worked flawlessly. The program runs for an hour and a half and I did not have a single problem. I guess it was the power supply but I was glad to go through all the diagnostics we discussed before replacing it. I hope this power supply lasts a lot longer than the last one. Thanks much for hanging in there with me and coming up with the solution.

    Additional Information:
    It’s my absolute pleasure and I am so happy to hear that the power supply replacement solved the problem.

    Additional Information:


    Additional Information:
    Y axis stop working X & Z work fine Y axis has two motors have check wiring & connections new breakout board still the same port & Pin set OK dont no were to go next David

    Additional Information:


    Additional Information:
    my cnc plasma cutter will run out the program when cutting. what is the cause?

    Additional Information:
    The cnc plasma question shod be a separate question. Can you pise that question by clicking the customer service live menu button at the top? Thanks.

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    WHAT CAUSES ONE OF MY TWO AXIS MOTORS TO STOP WHILE THE MACH3 PROGRAM IS STILL RUNNING

  • Hello what is the thread size of the water cooling fittings on the 2.2kw spindle? I am wondering if I can replace the fittings with standard pc liquid cooling fittings, which are G1/4".

    They do have a similar looking thread as the G1/4”, but I will confirm in the morning. We use the G1/4” on the pump and radiator so it will be easy to determine this fit when I get into the office.

    Additional Information:
    Another FAQ says it is an M8, but I will confirm.

    Additional Information:
    These are M8x1 thread. I was able to find M8x1 3/8 barb fittings on Ebay. I plan to drill and tap my spindle to G1/4 though.

    Click the link to add information to this solution:
    Hello what is the thread size of the water cooling fittings on the 2.2kw spindle? I am wondering if I can replace the fittings with standard pc liquid cooling fittings, which are G1/4".

  • Are the stepper motors on x and y axis suppose to be hot after running for approximately 30 min. I can touch them but they are hot.

    If your motors are hot to the touch, this is normal. Current is being drawn by the motor coils as the motor moves and as the motor stays at a position. If the motor is not using the current in the coils to move (holding it's position), the energy will be translated as heat (rather than motion, sound or light). Even while moving, some of the energy will be lost as heat. Remember that energy cannot be created nor destroyed.

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    Are the stepper motors on x and y axis suppose to be hot after running for approximately 30 min. I can touch them but they are hot.

  • what would be required as far as hardware is concerned to build my own 3 axis cnc mill?

    The hardware options to build a 3 axis machine are too vast to be able to recommend any one particular option. This would depend on your design and personal preference.

    Click the link to add information to this solution:
    what would be required as far as hardware is concerned to build my own 3 axis cnc mill?

  • I need to replace the on board computer of my laser engraving machine

    What model laser cutter and engraver do you have? What is the model number of the laser controller within the laser cutter and engraver?

    Click the link to add information to this solution:
    I need to replace the on board computer of my laser engraving machine

  • 3d printer motors not moving fast enough. How should I configure the motor drivers?

    This will depend on the 3D printer that you are using and the mechanics involved. Specifically regarding the motor drivers, software is really what determines the speed of the motor. If the computer is not able to product the high number of pulses that is required for faster motion, then you can reduce the microstepping and configure the software appropriately for the new microstepping so the resolution is corrected (steps/inch or steps/mm).

    Click the link to add information to this solution:
    3d printer motors not moving fast enough. How should I configure the motor drivers?

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