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Question #: 14826

Question: to drive the motors will the setting for motors hi be set ti low

Current Solution

The settings that you will use for your 3.0 amp driver to properly power and turn your 425 oz-in stepper motor will cheifly depend on your application and the mechanical parts you are using on your machine. In all circumstances, the amp setting for the stepper motor (according to the datasheet) should be 2.8 amps. Use the closest setting on the driver without going over.

Here is a good rule of thumb for the microstepping which will correspond to the resolution, but wil also affect torque. You always want to try to achieve the best torque and resolution for the axis you are moving but go with the lowest microstepping possible. In cases where there is mechanical advantage, like a lead screw scenario, where for each motor revolution, the axis move a very small amount, you will want a very low microstep value. This is because the mechanical configuration will provide most of the finer resolution and you will not need the microstepping to assist in this. Increase the microstepping only in conditions where the axis is not moving smooth enough, or where there is a mechanical disadvantage. A mechanical disadvantage would be where the stepper motor is causing a great amount of movement in the axis and the resolutions suffers from this condition. Increase the microstep value up to your desired resolution, but don't go over since the torque of the motor will decrease.

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Other Possible Solutions to this Question

  • 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?

  • wHAT IS THE SMALLEST LENGTH SHAFT I CAN USE FOR YOUR #25 DRIVE SPROCET?

    The hub length of the drive sprocket and the other mechanical devise that is used to connect on the shaft will determine the length of the shaft needed for use with the drive sprocket.

    The hub lengths for our drive sprockets are 1/2". So if you are connecting the drive sprocket to a motor, your motor shaft will need to be at least 1/2" in length.

    Click the link to add information to this solution:
    wHAT IS THE SMALLEST LENGTH SHAFT I CAN USE FOR YOUR #25 DRIVE SPROCET?

  • MY MOTORS GET REALLY HOT TO THE TOUCH.

    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.

    Click the link to add information to this solution:
    MY MOTORS GET REALLY HOT TO THE TOUCH.

  • 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.

    Click the link to add information to this solution:
    WHAT CAUSES ONE OF MY TWO AXIS MOTORS TO STOP WHILE THE MACH3 PROGRAM IS STILL RUNNING

  • When will the 2000 mm HIWIN Spec Linear Guide rail be available?

    That is difficult to tell at this time. Right when we get them in, they go fast. These items come from China and the units are shipped in via freight on ship, so there are many factors on the delivery such as weather.

    Click the link to add information to this solution:
    When will the 2000 mm HIWIN Spec Linear Guide rail be available?

  • HAVE PORTER CABLE 7518 ROUTER ON MY CNC AND WOULD LIKE TO KNOW IF YOUR ER20 COLLET NUT, FOR THE CABLE, WILL FIT ROUTER.

    Yes, our porter cable collets and nuts will fit the porter cable 7518.

    Additional Information:

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    HAVE PORTER CABLE 7518 ROUTER ON MY CNC AND WOULD LIKE TO KNOW IF YOUR ER20 COLLET NUT, FOR THE CABLE, WILL FIT ROUTER.

  • CAN THERE BE CLOSED LOOP CONTROL WITH STEPPING MOTORS?

    I haven't delved into using encoders with stepping motors too much. From my research, you need to have a controller that can provide the closed loop control, rather than software handling that process. I have also found from my research that using encoders on stepping motors is generally used to stop the machine in the case that the motor failed to achieve the commanded position for some reason and gives the user the chance to correct and continue with the job.

    If you want proper closed loop control, it may be best to go with servos and servo controller that provide the closed loop control within the real of those two components.

    Click the link to add information to this solution:
    CAN THERE BE CLOSED LOOP CONTROL WITH STEPPING MOTORS?

  • WHAT MOTORS DOES THE BLACK TOOTH USE?
  • WHAT MOTORS DOES THE BLACK TOOTH USE?
  • HOW LONG SHOULD THE MOTOR CABLES BE FOR BLACKTOE

    The motor cables for the blackToe are as follows:

    Total 30 feet

    X - 9
    Y - 10
    Z - 11

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    HOW LONG SHOULD THE MOTOR CABLES BE FOR BLACKTOE

  • THE MOTORS ARE NOT TURNING

    Make sure you follow the tutorial here: http://www.buildyourcnc.com/CNCElectronicsandWiring.aspx

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    THE MOTORS ARE NOT TURNING

  • IF WE ASSUME DESIRE TO PLACE THE RED LEAF 6' AWAY FROM TABLE, HOW MUCH CABLE IS NEEDED CONNECT MOTORS ON TABLE ITSELF?

    blackToe requires a minimum cable length of of 15 ft for X, 17 ft for Y and 18 ft for Z for the redLeaf to be positioned at midpoint along the long axis and under the table. Each axis would need have 6 feet extra (form the midpoint)

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    IF WE ASSUME DESIRE TO PLACE THE RED LEAF 6' AWAY FROM TABLE, HOW MUCH CABLE IS NEEDED CONNECT MOTORS ON TABLE ITSELF?

  • WHICH OF OUR PEDIATRIC PATIENTS WILL NEED 2 DOSES INFLUENZA VACCINE FOR THE 2011–12 VACCINATION SEASON?

    ACIP's influenza recommendations for children age 6 months through 8 years have changed for the 2011–12 season. According to the new algorithm, certain children need 2 doses of influenza vaccine this influenza season, separated by at least 4 weeks. Here is a summary:

    • Children age 6 months through 8 years who did not receive AT LEAST 1 dose of the 2010–11 vaccine should receive 2 doses, separated by at least 4 weeks, REGARDLESS of their previous influenza vaccination history.
    • Children age 6 months through 8 years whose influenza vaccination status from the previous season is not known should also receive 2 doses at least 4 weeks apart.
    • Children age 6 months through 8 years who received 1 dose of seasonal influenza vaccine during the 2010–11 season need ONLY 1 dose this season. This is because the vaccine strains are the same this season as last season.

    You may find this Immunization Action Coalition handout helpful: www.immunize.org/catg.d/p3093.pdf.

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    WHICH OF OUR PEDIATRIC PATIENTS WILL NEED 2 DOSES INFLUENZA VACCINE FOR THE 2011–12 VACCINATION SEASON?

  • I HAVE NEMA 34 MOTORS BUT NEED THE ELECTRICAL COMPONENTS DO YOU A KIT WITHOUT INCLUDED?

    If you are looking for the drivers to pair with NEMA 34 stepper motors, you can find the 6.0 amp drivers here:
    https://www.buildyourcnc.com/item/electronicsAndMotors-stepper-driver-6!0a

    The other electronics to send the signals to the 6.0 amp drivers (the control board that operates with the control software) is subject to personal preference, but here they are listed:

    Our breakout board (works with Mach3 and LinuxCNC and requires a parallel port on your computer):
    https://www.buildyourcnc.com/item/electronicsAndMotors-parallel-breakout-relay

    The PoKeys57CNC (works with Mach3 and Mach4):
    https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach4-mach3-USB-ethernet-Board

    Generic USB breakout board (works with Mach3):
    https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach3-USB-Board

    Additional Information:
    Do I need a driver for every motor or can I use one driver for all four motors

    Additional Information:
    Each motor needs its own driver.

    Click the link to add information to this solution:
    I HAVE NEMA 34 MOTORS BUT NEED THE ELECTRICAL COMPONENTS DO YOU A KIT WITHOUT INCLUDED?

  • WHAT ARE THE BEST FOODS THAT WILL HELP YOU LOSE WEIGHT?

    Lettuce, or any vegetable. Also drink a cup of water before meals, it'll make you feel fuller.

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    WHAT ARE THE BEST FOODS THAT WILL HELP YOU LOSE WEIGHT?

  • HOW MUCH SILICONE TUBE DO I NEED FOR A GREEN LEAN TO CONNECT THE SPINDLE

    The greenlean requires 56 feet of 1/4 Inside Diameter and 3/8 Outside Diameter silicon tube for the spindle.

    Additional Information:
    20

    Additional Information:
    20

    Click the link to add information to this solution:
    HOW MUCH SILICONE TUBE DO I NEED FOR A GREEN LEAN TO CONNECT THE SPINDLE

  • WHAT WOULD BE THE COST OF FREIGHT TO SOUTH AUSTRALIA?

    You can determine if the country is serviceable by:
    - selecting the items you want to purchase on the website
    - go to the cart (shopping cart top left of any webpage)
    - log in, or register
    - Enter the address and click on calculate shipping.

    The webpage will return the direct rates and whether your area is serviced or not. Feel free to enter any address as long as you are able to receive the package from that address.

    The shipping times are determined by the service you select in the shopping cart. If a machine is purchased, we generally have a one week lead time unless otherwise stated in the description of the machine's product page.

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    WHAT WOULD BE THE COST OF FREIGHT TO SOUTH AUSTRALIA?

  • WILL THE LASER ENGRAVER WORK ON NON-ANODIZED ALUMINUM

    no, it will only work on anodized aluminum

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    WILL THE LASER ENGRAVER WORK ON NON-ANODIZED ALUMINUM

  • I HAVE ONE OF YOUR SMALLER STEPPER MOTORS RUNNING MY X AXIS BRIDGE CRANE AND IF IT IS MOVED TO FAST THE MOTOR SOUNDS LIKE SKIPPING STEPS WILL 651OZ REQUIRE A DIFFERENT POWER SUPPLY CONTROLER?

    Yes, the 651 oz/in motor requires a driver that is compatible to the motors (the motor will draw 6 amps max and the driver paired with this motor will be able to allow for a 6 amp draw). I would also recommend a 36 volt power supply for better high velocity performance.

    Click the link to add information to this solution:
    I HAVE ONE OF YOUR SMALLER STEPPER MOTORS RUNNING MY X AXIS BRIDGE CRANE AND IF IT IS MOVED TO FAST THE MOTOR SOUNDS LIKE SKIPPING STEPS WILL 651OZ REQUIRE A DIFFERENT POWER SUPPLY CONTROLER?

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