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Question #: 3653

Question: Can I drive my X axes with 2 motors using one motor driver?

Current Solution

It is not recommended to drive two stepping (stepper) motors with a single driver. The driver will need to output the sum of the current that is rated for both motors. The best way to drive two motors on the same axis, or if you need the motors to spin in a synchronous fashion, then have each motor connected to their own driver and connect the signal wires from the drivers to the same signal step and direction pin on the breakout/interface board.

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Other Possible Solutions to this Question

  • Where can I get a motor driver "TX14207", or a substitute with instructions?

    I would recommend using our 5.6 amp driver as a replacement for the TX14207 driver. Apparently, those drivers are found in the 6040 CNC routers and will not contain documentation since it is typically sold as a part of a greater assembly. Here is the link to the recommended driver:
    https://buildyourcnc.com/item/electronicsAndMotors-stepper-driver-6!0a

    Click the link to add information to this solution:
    Where can I get a motor driver "TX14207", or a substitute with instructions?

  • How can I connect my pc to my motor drivers and motors?

    All you need is a CNC controller like the following options:

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

    This controller is easy to connect using standard wire screw terminals and works with the mach3 control software.

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

    This controller is a little bit more difficult to connect, but is a more feature-rich controller and will work with both mach3 and mach4 CNC control software titles.

    Specifically, a CNC controller connects to the computer via a USB cable and connects to the motor drivers. These controllers also connect to the limit switches, spindle/router control, air/fluid/mist control, etc.

    Click the link to add information to this solution:
    How can I connect my pc to my motor drivers and motors?

  • Can I use one motor drive 6A and conect 2 motor nema 24 425oz-in?, Can I do that??

    Connecting two motors to a single, larger current driver, is not recommended. Theoretically, this may not be an issue; however, problems could occur where one of the motors draw more current than the other due to some external forces or friction and one of the motors stalling as a result.

    If you need to have two motors turn in a synchronous way as a single axis, connect the two drivers to the same axis signal (the same step and direction pins from the breakout board).

    Click the link to add information to this solution:
    Can I use one motor drive 6A and conect 2 motor nema 24 425oz-in?, Can I do that??

  • Using your NEMA 24 stepping motor with microstepping, can I get a speed range from 3 RPM to 600 RPM ?
  • I am asking what to set my steps per using your kit stepper motors and a 1/2"x13 lead screw with Mach3

    Here is the formula for steps/inch (steps per inch)

    Steps = how many steps for a full ration of the motor = standard motor steps x number of microsteps for each step
    Standard motor steps for our stepping motors is 200 steps per revolution.
    Microsteps are selected on the driver and are shown as full, 1/2, 1/4, 1/8, 1/16, 1/32 etc... Use the denominator for the number of microsteps per step.

    Inches = how far the travel is for one full rotation of the motor. For the 1/2" - 13 TPI (threads per inch), the travel length will be 1"/13 or .076923". So, for one revolution of the motor, the travel distance will be .076923 inches.

    So, the steps = 200 * microsteps, let's make this 1/4 just for the formula.
    The inches will be .076923. Plug those into the formula:
    Steps / inch = (200 * 4) / .076923 This can also be written as:
    200 * 4 / (1 / 13) = 10,400



    Additional Information:

    Click the link to add information to this solution:
    I am asking what to set my steps per using your kit stepper motors and a 1/2"x13 lead screw with Mach3

  • 4 axis kit can I use 2 motors for the gantry with one controller card? or I buy the 3 axis kit instead?

    Yes, you can use the 4 axis kit and use two of the motors on the gantry. You will need to wire the gantry axis motors to the same step and direction signals on the controller interface. For example, if the gantry axis is the X axis, then on the controller step and direction terminals (CP and CW) is wired to both of the stepper motor drivers for the X axis.

    Click the link to add information to this solution:
    4 axis kit can I use 2 motors for the gantry with one controller card? or I buy the 3 axis kit instead?

  • I have a KL23H2100-30-4B motor with a KL-4030 driver and my motor stalls if I set the rapid above 180 imp.

    What mechanical drive system are you using? If your mechanical drive system connected to the stepper motor causes the motor to spin too fast, then you will be reaching the torque limit of the motor under the load of your axis.

    Click the link to add information to this solution:
    I have a KL23H2100-30-4B motor with a KL-4030 driver and my motor stalls if I set the rapid above 180 imp.

  • I bought Nema 24 motors and driver package with usb board. What do i need to have more speed? Cant even jog past 25 ipm without the motor stalling (not having enough torgue)

    We recommend checking the dip switch settings on your drivers, having the correct microstepping/amp settings along with the steps/unit will help the motors run as effective as possible.
    This is a default parameter that we use while we test our motors:
    Driver dip switch settings will be at a 1/16 microstepping and 2.7amp (11001100) for x/y-axis and the z-axis will be at 1/4 microstepping and 2.7amp (10101100).

    In planet-cnc with increasing the motor speed, you will have to modify the settings in planet-cnc (File/settings/setup) you will modify the initial speed, maximum speed, and the acceleration.
    X/Y-axis step/unit: 1422.22 initial speed:500 maximum speed:750 acceleration:25
    Z-axis step/unit: 1600 initial speed:100 maximum speed:300 acceleration:25
    The initial speed and maximum speed will have to be roughly tested and adjusted per application.
    Make sure to adjust the JOG slide bard underneath the axis controls on screen to about 750, to compensate for your x/y-axis adjustments. If left alone the speed will max out at the default setting.

    Here is a video tutorial to calculate the steps required depending on your mechanical linear motion components. (

    )

    Click the link to add information to this solution:
    I bought Nema 24 motors and driver package with usb board. What do i need to have more speed? Cant even jog past 25 ipm without the motor stalling (not having enough torgue)

  • Can you sell me a kit to control my motor from the pc? I already have a motor, driver and power supply.

    All you need is a CNC controller like the following options:

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

    This controller is easy to connect using standard wire screw terminals and works with the mach3 control software.

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

    This controller is a little bit more difficult to connect, but is a more feature-rich controller and will work with both mach3 and mach4 CNC control software titles.

    Specifically, a CNC controller connects to the computer via a USB cable and connects to the motor drivers. These controllers also connect to the limit switches, spindle/router control, air/fluid/mist control, etc.

    Click the link to add information to this solution:
    Can you sell me a kit to control my motor from the pc? I already have a motor, driver and power supply.

  • The motor was tested on the same axes were the others work but one of the NEMA 24 425 Oz motors dose not turn just jitters.

    The NEMA 25 motor uses a different current than other motors. Make sure when you test the NEMA 25 motor, the current setting is at 2.43.

    Click the link to add information to this solution:
    The motor was tested on the same axes were the others work but one of the NEMA 24 425 Oz motors dose not turn just jitters.

  • My x and y motors are on each end of my gantry do I wire each motor to the same XP

    I'm not sure what you mean by XP. Can you clarify? Thanks.

    All stepper motors must be wired to their own stepper motor driver. If two motors need to be driven by one signal (say there are two X motors) then the two drivers will be connected to same CP (pulse or step) and CW (direction) pins on the control interface. If the two motors need to turn in opposite directions, then swap the A and B coil connections.

    Additional Information:
    Whitch A+ or A - B + or B -

    Click the link to add information to this solution:
    My x and y motors are on each end of my gantry do I wire each motor to the same XP

  • Is there a way to change the direction of a motor with the motor to driver wiring?

    You can change the direction of a stepper motor's rotation by swapping the A and B coils where the stepper motor is connected to the stepper driver. This may not work with every stepper motor and driver combination.

    To do this:
    - Turn off all power to the stepper drivers. If this is not done, you will damage the stepper driver.
    - Wait at least 1 minute for the power to dissipate from the drivers and power supply.
    - Once power is off, remove the wires from the A+ and A- and insert these wires into the B+ and B- respectively. Then insert the wires that were in the B+ and B- into the A+ and A- respectively.

    Click the link to add information to this solution:
    Is there a way to change the direction of a motor with the motor to driver wiring?

  • 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.

    Click the link to add information to this solution:
    I am using you reliable builder, though i am building from scratch. Can you help me size motors to my construction?

  • wiring for nema 24 stepping motor to microstep driver CW230. With BlueBrew board .

    Three steps are involved: wiring the stepper motor to the CW230 driver, wiring the CW230 driver to the parallel controller and wiring power to the CW230 driver.

    Wiring the NEMA stepper motor to the CW230 driver:
    This will depend on the number of wires are coming out of the stepper motor. If the stepper motor has 8 wires, you want to wire it in bipolar parallel configuration. Check the datasheet of the motor for this configuration. If the motor has 6 or 4 wires, you don't necessarily need the datasheet, but it is quicker and more helpful. Otherwise, you can use a multimeter to determine the correct wires. Since both coils will have the same resistance across each, you can use a multimeter set to ohms, or resistance, to determine the wires for each coil. If there is OL on the multimeter for any two wires, that means it is an Open Line, or no connection. That could only mean that those wires are not on the same coil. If the reading shows a number, then those wires are on the same coil, and on a 4 wire stepper motor, that will be the wires to connect to either the A or B coil. If the resistance is half of a resistance of another set on a 6 wire stepper motor, then on of those wires if at the midpoint of a coil. On 6 wire motors, only use the wire pair that have the highest resistance. Those will be the wires on the ends of each coil. Connect one pair to the A terminals and the other pair to the B terminals.

    Wiring the CW230 driver to the controller:
    The Step-, or sometimes called CP- is connected to one of the numbered terminals between 2 and 7 and the DIR-, sometimes called the CW-, is connected to one of the numbered terminals between 2 and 7. X is typically connected to 2, and 3, step and DIR respectively. Y is typically connected to 4 and 5. Z is typically connected to 6 and 7. The 5v is connected to Step+, or CP- and DIR+, or CW+.

    Make sure that Mach3, or LinuxCNC is configured for this configuration under ports and pins in Mach3, or the stepconf in LinuxCNC.

    Additional Information:
    Let me know if there are clarifications that are needed here.

    Click the link to add information to this solution:
    wiring for nema 24 stepping motor to microstep driver CW230. With BlueBrew board .

  • I'm going to use 2 stepper motors for my X-axis. Can I use the same connections on the B/O board to do this knowing I will need 2 separate driver boards.

    Yes, absolutely. If you need two motors for a single axis, you will want to use the same terminals for pulse and direction from the breakout board.

    More specifically, you will wire the step/pulse pin to both drivers, and the direction pin to both drivers. If the motors need to turn in different directions, simply swap the A and B coil connections on one of the motors.

    Additional Information:
    i have checked the cnc machine for any flex and there is none but i still cannot cut circles they end up square.have checked calibration and it is correct but if i run at 4000 mm feed all comes out correct but if i change feed to say 2000 mm it makes the part small, like in tiny.

    Click the link to add information to this solution:
    I'm going to use 2 stepper motors for my X-axis. Can I use the same connections on the B/O board to do this knowing I will need 2 separate driver boards.

  • How do I connect my motor wires to the driver?

    Use the datasheet associated to the motor that you purchased. Use the bipolar parallel configuration to optimum performance. The datasheets are located in their respective motor product pages. Just click on the motion electronics at the left and scroll down to the motor you have and click on the title, or datasheet link next to the motor. The datasheet will either be in the form of a pdf, or within the instructions on that product page.

    Additional Information:
    wiring diagram



    Additional Information:


    Additional Information:

    Click the link to add information to this solution:
    How do I connect my motor wires to the driver?

  • I AM USING A XYLOTEX 3 AXIS BOARD AND WANT TO ADD ANOTHER MOTOR SLAVED THE X-AXIS. WILL DRIVE CW230 WORK?

    If the pins from the terminal block on the side of the board are outputs, or at least 2 of them are outputs, then you can connect our modular driver to the board (example: cw230). If they are all inputs, then you would not be able to connect an external driver.

    Click the link to add information to this solution:
    I AM USING A XYLOTEX 3 AXIS BOARD AND WANT TO ADD ANOTHER MOTOR SLAVED THE X-AXIS. WILL DRIVE CW230 WORK?

  • I need the calculation to determine the stepper motor torque to find the load that it can lift using a lead screw at 1/2" diameter with 13 TPI.

    There are two main questions that we can answer with respect to motor torque and the mechanical advantage of lead screws, 1) What torque motor do you need to lift a particular weight, or 2) What maximum weight will my motor torque be able to lift.

    This formula uses Newtons (N) as it's final unit. Use this with the included radius (R) to determine the torque. Newtons can easily be converted to lbs or ounces using online conversions.

    Effort = Sf + (Load/(2 x pi x (R/p) x Se))

    where:
    p = pitch of the screw
    Se = screw efficiency = Standard lead screw will be between 20% (.2) and 40% (.4)
    Sf = static force. This is the force that is needed to start the movement. The number may be eliminated, but it is good to use a number in the 5 N to 20 N range.
    Load = the expected load that the effort will need to carry (i.e., the router and the included axis assembly that the motor will need to lift)
    R = radius of the lead screw


    This formula is based on the "law of the machine"

    The final effort amount with its unit of newtons and R will be the torque. For example, if the effort comes to 100 N (newtons) and the R is .5 inches, then you can assume that the effort is 50 N-in since it would take twice the effort to turn form the one inch mark from the center of the shaft.

    Example:

    Load = 90 N (20.2 lbs)
    R = 1 inch since that is the length from the center of the shaft that the motor is rated
    p = 1 inch / 13 = .08 inches

    Effort = 5 N + (90 N / (2 x 3.14 x (1 / .08) x .2))
    Effort = 5 N + (90 N / (6.28 x 12.5 x .2))
    Effort = 5 N + (90 N / (15.7))
    Effort = 5 N + (5.73 N)
    Effort = 10.7 N = 2.4 lbs = 38.4 oz-in

    I am putting the oz-in on the end because the formula considers the distance from the center of the shaft to be one inch.

    Therefore, a 425 oz-in motor would be able to lift a 20.2 lb Router with its accompanying assembly. If the assembly and router is heavier, plug in the numbers and determine the effort required.

    With a bit of algebra, the formula can be rewritten to find the load:

    Load = (Effort - Sf) x (2 x pi x (R/p) x Se)

    Another formula that does not consider friction at all:

    Effort = (Load x p) / (2 x pi x R)

    Lets see if we get similar results:

    Effort = (20 lb x .08 inches) / (2 x 3.14 x 1)
    Effort = 1.6 / 6.28 = .255 lbs = 4.08 oz-in

    The results from both formulas appear to be very small because a 13 TPI screw will have enormous mechanical advantage.

    It is evident that the first formula that does consider friction that we are loosely estimating is far more conservative than the second formula. Either way, even the most conservative formula shows that the 425 oz-in motor will handle very large weights. If you are using a lead screw with only two turns per inch, .5 inch pitch, you can determine the requirements with the first formula.

    Example for a 10 TPI 5 start (2 turns per inch) lead screw:

    Load = 90 N (20.2 lbs)
    R = 1 inch since that is the length from the center of the shaft that the motor is rated
    p = 1 inch / 2 = .5 inches

    Effort = 5 N + (90 N / (2 x 3.14 x (1 / .5) x .2))
    Effort = 5 N + (90 N / (6.28 x 2 x .2))
    Effort = 5 N + (90 N / (2.512))
    Effort = 5 N + (35.83 N)
    Effort = 40.828 N = 9.18 lbs = 146.88 oz-in

    Customer Response:
    thank you so much

    Additional Information:


    Additional Information:


    Additional Information:
    how do i calculate torque of stepper motor if lead screw coupled to motor shaft and load applied by lead screw on plate is 100 kg by vertically

    Additional Information:
    Pls


    Additional Information:
    1m 16mmdiameter ball screws calculations


    Additional Information:
    What is the max load that 2 NEMA 17 stepper motors (spaced 2 feet apart, both will be pushing up on the same gantry) can lift while using a rod with the following specifications T8 OD 8mm Pitch 2mm Lead 4mm for each motor.

    Additional Information:


    Additional Information:
    1

    Click the link to add information to this solution:
    I need the calculation to determine the stepper motor torque to find the load that it can lift using a lead screw at 1/2" diameter with 13 TPI.

  • 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.

    Click the link to add information to this solution:
    With a 1/2 lead screw what is the optimal steps for the stepper motor driver 1/16, 1/8, 1/4 etc

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