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Question #: 2242

Question: Motor tuning. While motor tuning what are the recommended steps per inch, velocity, and acceleration for the BlackFoot CNC?

Current Solution

These are the recommend values(default) for our blackFoot CNC machine, the acceleration and velocity can be adjusted as high as the motor can rotate without stalling! Suggested increment's will be by 10's.

blackFoot:
X-axis
“CW8060 (6.0A) Driver”
Set to 1/16 Microstep, 5.43A
Dipswitches: 01100110 (“0”=down, “1”=up)
Mach3 Motor Tuning: 914.29 steps/in, Velocity 400.02, Acceleration 4
Y-axis
“CW230 (3.0A) Driver”
Set to 1/16 Microstep, 2.7A
Dipswitches: 11001100
Mach3 Motor Tuning: 1422.22 steps/in, Velocity 400.02, Acceleration 4
Z-axis
“CW230 (3.0A) Driver”
Set to 1/4 Microstep, 2.7A
Dipswitches: 10101100
Mach3 Motor Tuning: 1600 steps/in, Velocity 79.98, Acceleration 5

Additional Information:
how can we tuning the CNC motor

Respond:

Other Possible Solutions to this Question

  • While motor tuning what are the recommended steps per inch, velocity, and acceleration for the GreenBull CNC?

    In the customer service live, just enter "motor tuning" and it will give you a list of all the recommended or default settings for our machines. However the acceleration and velocity for the greenBull(other machines) will be an actual determination on your trials. You will want the highest possible acceleration and velocity without the motors stalling, so you can do increments of ten to be on the safe side, if it is too slow try increments of 25.

    The steps per inch is dependent on the microstepping:
    Steps/Inch for the x and y
    Steps = 200 motor steps per revolution x 16 microsteps = 3200 steps
    Inches = sprocket number of teeth x pitch of the sprocket = 14 x .25" = 3.5 inches
    steps/inch = 3200 / 3.5 = 914.28
    This is really a starting point. You will then need to use the mach3 calibration function to get the perfect steps/inch value. Use as long a measurement as possible when calibrating.

    Velocity:
    Start with a value of 1000 ipm. Increase this value with a relatively low acceleration at about 10. You will notice at a particular velocity that it will stall. This is your stall velocity. I would take the stall velocity and reduce it by about 30% to 50% which should give you a good final safe velocity.

    Acceleration:
    Once the velocity is found, raise the acceleration until it start to stall at a low velocity. Reduce the acceleration by about the same percentage to stick with a safe acceleration.

    The acceleration is mostly dependent on torque (current) and the top speed is dependent on the amount of voltage.

    Give some tests with all of the axes running at the same time. If you notice and stalling, reduce velocities and acceleration depending on when the stall happens (top end, or acceleration curve).


    X-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/16 Microstep
    Dipswitches: 01100110 (“0”=down, “1”=up)
    Mach3 Motor Tuning: 914.29 steps/in
    Y-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/16 Microstep
    Dipswitches: 01100110
    Mach3 Motor Tuning: 914.29 steps/in
    Z-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/4 Microstep
    Dipswitches: 01100100
    Mach3 Motor Tuning: 1600 steps/in

    Additional Information:


    Additional Information:


    Additional Information:
    4th axis


    Additional Information:

    Click the link to respond:
    While motor tuning what are the recommended steps per inch, velocity, and acceleration for the GreenBull CNC?

  • My question about motor tuning for the blacktoe in Mach 3 was for the aceleration and velocity settings what are the recomended settings

    In the customer service live, just enter "motor tuning" and it will give you a list of all the recommended or default settings for our machines. However the acceleration and velocity for the greenBull(other machines) will be an actual determination on your trials. You will want the highest possible acceleration and velocity without the motors stalling, so you can do increments of ten to be on the safe side, if it is too slow try increments of 25.

    The steps per inch is dependent on the microstepping:
    Steps/Inch for the x and y
    Steps = 200 motor steps per revolution x 16 microsteps = 3200 steps
    Inches = sprocket number of teeth x pitch of the sprocket = 14 x .25" = 3.5 inches
    steps/inch = 3200 / 3.5 = 914.28
    This is really a starting point. You will then need to use the mach3 calibration function to get the perfect steps/inch value. Use as long a measurement as possible when calibrating.

    Velocity:
    Start with a value of 1000 ipm. Increase this value with a relatively low acceleration at about 10. You will notice at a particular velocity that it will stall. This is your stall velocity. I would take the stall velocity and reduce it by about 30% to 50% which should give you a good final safe velocity.

    Acceleration:
    Once the velocity is found, raise the acceleration until it start to stall at a low velocity. Reduce the acceleration by about the same percentage to stick with a safe acceleration.

    The acceleration is mostly dependent on torque (current) and the top speed is dependent on the amount of voltage.

    Give some tests with all of the axes running at the same time. If you notice and stalling, reduce velocities and acceleration depending on when the stall happens (top end, or acceleration curve).


    X-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/16 Microstep
    Dipswitches: 01100110 (“0”=down, “1”=up)
    Mach3 Motor Tuning: 914.29 steps/in
    Y-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/16 Microstep
    Dipswitches: 01100110
    Mach3 Motor Tuning: 914.29 steps/in
    Z-axis
    “CW8060 (6.0A) Driver”
    Set to 5.43A, 1/4 Microstep
    Dipswitches: 01100100
    Mach3 Motor Tuning: 1600 steps/in

    Additional Information:


    Additional Information:


    Additional Information:
    4th axis


    Additional Information:

    Click the link to respond:
    My question about motor tuning for the blacktoe in Mach 3 was for the aceleration and velocity settings what are the recomended settings

  • I just changed my X and Y to the ACME 1/2" 5 start lead screw. What are the motor tuning numbers. I have the book built machine.

    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! (

    )

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    I just changed my X and Y to the ACME 1/2" 5 start lead screw. What are the motor tuning numbers. I have the book built machine.

  • I purchased the large gantry system with USB control. I have built the CNC and it is working fine. Now fine tuning the motors. On the X-axis I have the Velocity set at 60 (inches), Acceleration at 1.4, the Step Pulse 1-5us and Dir Pulse set at 0. Do I need to adjust the pulses?

    The steps per unit is automatically determined in the calibration of the axis by clicking on the "set steps per unit" button above the reset button on the settings tab. Initially set the velocity and acceleration to a low setting, like 100 and 10 respectively, so that the axis does not stall during this operation. Once calibrated, the steps per unit will be set to the correct value and the velocity and acceleration can be increased. I have a video explaning the tuning of the motors on this page:
    https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-breakout-Mach4-mach3-USB-ethernet-Board

    The name of the video is Test and Tune the motors.

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    I purchased the large gantry system with USB control. I have built the CNC and it is working fine. Now fine tuning the motors. On the X-axis I have the Velocity set at 60 (inches), Acceleration at 1.4, the Step Pulse 1-5us and Dir Pulse set at 0. Do I need to adjust the pulses?

  • My stepper motors are randomly and frequently stalling while using the Pokeys57CNC controller board, any idea what could be the issue?

    I would suspect that the velocity and/or acceleration is too high for the amp setting on the driver. Consider increasing the current amp setting on the driver is the motor can handle the current, or decrease the velocity and/or acceleration.

    You might also want to check to see if you have any mechanical binding on the machine. To check, remove the mechanical drive mechanism so the axis slides freely and slide it from end to end to feel if you have any tight areas or binding.

    Click the link to respond:
    My stepper motors are randomly and frequently stalling while using the Pokeys57CNC controller board, any idea what could be the issue?

  • one of my motors from the blackfoot kit goes back and forth rather than turning, the wiring hasnt changed since i bought it, what could be wrong?

    The motor shaft does not turn, but slides back and forth in an axial motion? Please submit additional information on this page.

    Additional Information:
    it goes one step then the next step in the other direction so it seems to just vibrate

    Additional Information:
    It sounds like this could be a bad driver? You can determine if this is the cause by connecting another motor to this driver to see if it still happens to the new motor plugged into that driver. This will either rule out the motor causing this, or if it is the driver.

    You can also possibly rule out the driver as well if you change the step and direction wires from another driver to the problem driver.

    Make sure you do these steps one at a time. It's best to consider a single variable at a time.

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    one of my motors from the blackfoot kit goes back and forth rather than turning, the wiring hasnt changed since i bought it, what could be wrong?

  • This question has been asked before: What happened to my Mach3 Motor Tune-up in the Configure tab, it has disappeared but had been there before. The previous answers were to go to config: motor tuning

    The Mach3 USB interface board requires 24V relays externally. There are no relays on the mach3 usb board. If you use an external relay on the mach3 usb board, the relay connects to the V+ which is 24V and the output pin is the return.

    Additional Information:
    I understand what you are saying. Does your relay board work with the Mach3 USB board? If not, what relay board do you suggest to work with this usb controller?

    Additional Information:
    Our relay board works with our parallel breakout board. An off the shelf SSR (Solid State Relay) made for 24V should work fine.

    Click the link to respond:
    This question has been asked before: What happened to my Mach3 Motor Tune-up in the Configure tab, it has disappeared but had been there before. The previous answers were to go to config: motor tuning

  • This question has been asked before: What happened to my Mach3 Motor Tune-up in the Configure tab, it has disappeared but had been there before. The previous answers were to go to config: motor tuning

    Motor tuning is the third option down when you click the config menu option. I have never used the motor tuning dialog from anywhere else. If you are looking for the button to calibrate the axes, then go to the settings tab and click on the button that says "Set Steps per Unit".

    Click the link to respond:
    This question has been asked before: What happened to my Mach3 Motor Tune-up in the Configure tab, it has disappeared but had been there before. The previous answers were to go to config: motor tuning

  • 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.

    Click the link to respond:
    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.

  • I have a 4x8 CNC and would like to cut my own parts for the Blackfoot. What is the price for the plans and the electronics ?

    The available options for the blackFoot, is only structural components with hardware, and structure components/hardware with electronic components.
    However we currently do not have any plans available for public use/distribution.

    Click the link to respond:
    I have a 4x8 CNC and would like to cut my own parts for the Blackfoot. What is the price for the plans and the electronics ?

  • Having some repeatability issues on Y axis of the blackFoot CNC Router. doing motor tuning, but also notice the Y axis idler pulley doesn't stand up straight. Bearing seems good, just loose on the bolt. Do i try to shim between bearing to bolt or shim the sides to make it stay up straight?

    First, make sure that the alignment of the roller chain is straight with respect to where the roller chains are affixed at the ends of the gantry. This is of chief importance as there will be a clicking sound if there is no alignment. Also, make sure the idler sprocket can move from side to side to auto-correct on alignment, unless you can fit nuts or shim washers on either side to maintain the perfect position with respect to the alignment of the chain.

    The misalignment of the chain is most likely the reason the idler sprocket is slanted at an angle.

    If you are having repeatibility issues, make sure the drive sprocket is very tight on the motor shaft, and that the set screw is tightened on the flat of the stepper motor shaft. This is the typical culprit if any of the axes are having repeatability problems. It is difficult to determine if the drive sprocket is loose. Make sure to push with a bit of force to determine this.

    Additional Information:
    ok, took the y axis apart. Checked the drive sprocket. it seems tight. Although I did not take it off and put it back on. Checked the chain alignment edge to edge using a straight edge along the y drive rail and no clicking. tightened the chain and seemed to have it now off the same distance to the other side of the Y. I lossened it back up but no noticeable change.
    using Mach3 spindle not running, just a pointer bit in and feed rate 50ipm
    9k line gcode it's off by about .1 to .14 (ran code 4 different times, once in opposite corner of table) 130k gcode it's off 1.3 to 1.5 (ran code 4 different times, once in opposite corner of table). Not sure what to do, using the using the mach3 motor tuning it seems really close, and it's always the Y. should I swap wiring on the x & y drivers to see if problem goes to X?


    Additional Information:
    You can give the swap a try. It would rule out a possible wiring/driver/motor issue. If that doesn't work, we will need to go email so we can see pics to get a clearer understanding of the issue.

    Additional Information:
    So, I couldn't swap X and Y as X has a big honkin' motor. So I swapped the Driver for Y and Z, ran the same 130k line gcode and Y was spot on, but now Z is off. it was only off by .01 but there wasn't as much Z movement as there was Y of course. To me this would point to the driver. What do you think?

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    Having some repeatability issues on Y axis of the blackFoot CNC Router. doing motor tuning, but also notice the Y axis idler pulley doesn't stand up straight. Bearing seems good, just loose on the bolt. Do i try to shim between bearing to bolt or shim the sides to make it stay up straight?

  • What is the recommended unit or brand of CPU cooling system for the 2.2 kw spindle on the Fabricator Pro machine

    There really isn't any specific brand. We purchase the components in a disparate fashion from China. I will product a video today that shows all of the components that we use and also offer the components on the website.

    From the upcoming video, you will be able to identify the parts is you feel you want to search for these components yourself.

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    What is the recommended unit or brand of CPU cooling system for the 2.2 kw spindle on the Fabricator Pro machine

  • WHAT ARE CURRENT RECOMMENDED IEEE EMF OCCUPATIONAL EXPOSURE LEVELS AND GUIDELINES FOR RADIO BASE STATION ANTENNAS?

    The following answer assumes "radio Base Station Antennas" refers to base stations used for personal wireless communications services such as cellular telephone, Personnel Communications Services (PCS), and Enhanced Specialized Mobile radio (ESMR). In the United States, the frequency band allocated for base stations used for personal wireless communications is 869-894 MHz for cellular service, 851-866 MHz for ESMR, and 1930-1990 MHz for PCS. The IEEE exposure limits (maximum permissible exposure—MPE) for occupational exposure (controlled environments where exposures may be incurred by persons who are aware of the potential for exposure) are frequency dependent and are expressed in terms of incident power density. The appropriate value to compare with the MPE is the incident power density averaged over the vertical cross-section of the human body. The occupational exposure limits are also time-averaged over any six-minute interval. The IEEE C95.1-1991 MPE values are shown in the table below:
    IEEE C95.1-1991 Maximum Permissible Exposure (MPE) Values
    Frequency Band Power Density
    General mw/cm2 W/cm2
    851-866 MHz f/300 mW/cm2 2.84-2.88 28.4-28.8
    869-894 MHz f/300 mW/cm2 2.90-2.98 29.0-29.8
    1930-1990 MHz f/300 mW/cm2 6.43-6.63 64.3-66.3
    NOTE: f is in MHz
    As indicated above, these values are for continuous exposure (t > 6 minutes) and are to be compared with the spatial average of the incident power density. all base stations used for personal wireless telecommunications services in the United States are required to comply with the FCC limits (as mandated by the Telecommunications Act of 1996). The FCC limits are based on a hybrid of the IEEE limits and the 1986 recommendations of the National Council on Radiation Protection and Measurements. The FCC MPEs are the same as the IEEE values for frequencies below 1500 MHz but are capped at 5 mW/cm2 (50 W/cm2) for frequencies greater than 1500 MHz.

    Both the FCC and IEEE MPEs for exposure of the public (uncontrolled environments) are one-fifth of the above values. As above, the value to compare with the MPE is the incident power density averaged over the vertical cross-section of the human body. The averaging time for the general public is 30 minutes. Thus, for transient exposures lasting six minutes or less, the MPEs for occupational exposure and exposure of the general public MPEs are the same. For cases of simultaneous exposure from antennas operating in different frequency bands, the ratio of the spatially averaged incident power density in each frequency band to the corresponding MPE for that band is determined and the sum of all such ratios must be less than unity in order to comply.

    R. C. Petersen
    Manager, Wireless and Optical
    Technologies Safety Department

    Click the link to respond:
    WHAT ARE CURRENT RECOMMENDED IEEE EMF OCCUPATIONAL EXPOSURE LEVELS AND GUIDELINES FOR RADIO BASE STATION ANTENNAS?

  • I need a customised blackfoot without spindle but mount for vacuum pump pick and place.What software do I need and what's the quote

    We currently do not have that application implemented in our design. please suggest this in our R/D section (http://buildyourcnc.com/ResDev.aspx).

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    I need a customised blackfoot without spindle but mount for vacuum pump pick and place.What software do I need and what's the quote

  • Hello, I have a Greenbull almost ready to work and I am trying to calibrate the machine, what are the specifics values as steps per units (SPU), ….. to load in planet cnc software to do the best accuracy as possible. My currents values are standar: Steps/unit 200.000, int speed 0.00, Maximun speed 0.00 and Acceleration 15.000 for each axes. Thank for your help.

    The greenBull uses roller chain for the X and Y axes. The drive sprockets have 14 teeth and the pitch (from crown to crown, or pin to pin measurement) is 1/4" (0.25 inches). You will need the pitch circumference which is: 14 * .25 = 3.5 inches. We need to find the steps per inch (steps/inch). We now have the inches for one full revolution. Now we need to find the number of steps for one full rotation of the motor. For these sprockets, I find that 16 microsteps is best. Make sure that the drivers for the X and Y axes are set to 1/16 microstepping. The motor have 200 steps per rotation, so the total steps with 1/16 microsteps is 200 * 16 = 3200. So the steps/inch is 3200 step / 3.5 inches = 914.286.

    The velocity should be around 400-1000. Test various values for velocity and make sure that no stalling happens. Start with a very low acceleration and determine it's top velocity. When the top velocity is found, reduce the velocity to give you a good factor of safety. Then increase the acceleration until it stall at a low velocity and then reduce the acceleration to give you a good factor of safety for acceleration.

    Do the same thing for the z-axis. The lead screw pitch circumference is 0.5 inches (2 turns per inch or 5starts/10tpi).

    Click the link to respond:
    Hello, I have a Greenbull almost ready to work and I am trying to calibrate the machine, what are the specifics values as steps per units (SPU), ….. to load in planet cnc software to do the best accuracy as possible. My currents values are standar: Steps/unit 200.000, int speed 0.00, Maximun speed 0.00 and Acceleration 15.000 for each axes. Thank for your help.

  • I am configuring a blackfoot with 1 CW8060 and 2 CW230's with linuxcnc and cannot figure out the proper settings for stepconf. Can you provide the default settings that should work with these motors?

    These are the recommend values(default) for our blackFoot CNC machine, the acceleration and velocity can be adjusted as high as the motor can rotate without stalling! Suggested increment's will be by 10's.

    blackFoot:
    X-axis
    “CW8060 (6.0A) Driver”
    Set to 1/16 Microstep, 5.43A
    Dipswitches: 01100110 (“0”=down, “1”=up)
    Motor Tuning: 914.29 steps/in, Velocity 400.02, Acceleration 4

    Y-axis
    “CW230 (3.0A) Driver”
    Set to 1/16 Microstep, 2.7A
    Dipswitches: 11001100
    Motor Tuning: 1422.22 steps/in, Velocity 400.02, Acceleration 4

    Z-axis
    “CW230 (3.0A) Driver”
    Set to 1/4 Microstep, 2.7A
    Dipswitches: 10101100
    Motor Tuning: 1600 steps/in, Velocity 79.98, Acceleration 5

    Additional Information:
    Thanks! What about step and direction config? I have:
    Step time: 2000ns
    Step space: 8000ns
    Direction hold: 5000ns
    Direction Setup: 5000ns

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    I am configuring a blackfoot with 1 CW8060 and 2 CW230's with linuxcnc and cannot figure out the proper settings for stepconf. Can you provide the default settings that should work with these motors?

  • How can I decrease the rapid acceleration of the cutter from a completed cutting operation to a new location so that the stepper motor will not lose its steps and mess up the machine zero settings? I am using CamBam and Mach3 on my machine with a chain drive. what is the best way to reduce accleration

    Decreasing the speed of acceleration in the cutter? Meaning of your router/spindle?, To modify the speed of a router will be going to the router itself and modifying the speed, but if a spindle is being used modifying it will be done either manually in the VFD (VFD Setup:
    Change PD001 to '0' (source of run commands)
    Change PD003 to 300 (main frequency - Hz)
    Change PD004 to 300 (base frequency - Hz)
    Change PD005 to 400 (max operating frequency - Hz)
    Change PD006 to 2.5 (intermediate frequency - Hz)
    Change PD008 to 220 (max voltage - V)
    Change PD009 to 15 (intermediate voltage - V)
    Change PD010 to 8 (minimum voltage - V)
    Change PD011 to 100 (frequency lower limit - Hz)
    Change PD142 to 7 (rated motor current - Amps)
    Change PD143 to 2 (motor pole number)
    Change PD144 to 3000 (rated motor revolution))<- make sure these are your settings in the VFD. If the spindle is wired to the breakout board and is working through Mach 3 then the modification will be done in your CamBam/Feed rate settings.

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    How can I decrease the rapid acceleration of the cutter from a completed cutting operation to a new location so that the stepper motor will not lose its steps and mess up the machine zero settings? I am using CamBam and Mach3 on my machine with a chain drive. what is the best way to reduce accleration

  • what are all the settings i'd need for mach3 for use with a blackfoot and a redfly?

    These are the recommend values(default) for our blackFoot CNC machine, the acceleration and velocity can be adjusted as high as the motor can rotate without stalling! Suggested increment's will be by 10's.

    blackFoot:
    X-axis
    “CW8060 (6.0A) Driver”
    Set to 1/16 Microstep, 5.43A
    Dipswitches: 01100110 (“0”=down, “1”=up)
    Mach3 Motor Tuning: 914.29 steps/in, Velocity 400.02, Acceleration 4
    Y-axis
    “CW230 (3.0A) Driver”
    Set to 1/16 Microstep, 2.7A
    Dipswitches: 11001100
    Mach3 Motor Tuning: 1422.22 steps/in, Velocity 400.02, Acceleration 4
    Z-axis
    “CW230 (3.0A) Driver”
    Set to 1/4 Microstep, 2.7A
    Dipswitches: 10101100
    Mach3 Motor Tuning: 1600 steps/in, Velocity 79.98, Acceleration 5

    Additional Information:
    how can we tuning the CNC motor

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    what are all the settings i'd need for mach3 for use with a blackfoot and a redfly?

  • Does Mach3USB have a selection for motor tuning, if so, where, the selection in the config menu doesn't work

    The motor tuning for any controller under Mach3 is independent of the actual controller. It is actually a function of the steps per unit and setting the velocity which is units/minute and acceleration which is units/minute/minute.

    To adjust the velocity, acceleration and steps/unit, click on config -> motor tuning.

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    Does Mach3USB have a selection for motor tuning, if so, where, the selection in the config menu doesn't work