### Question #: 14107

Question:
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What are the toggle switch settings on the stepper motor drivers for the .5 in. lead screw 10 tpi 2 turns per inch? Thankyou!
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**On the top of the stepper motor drivers is a grid with the appropriate toggle switch positions for the lead screw being used. If it is 2 turns per inch, the proper toggle switch positions would be 01101110. Try this and see if it works.**

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### Other Possible Solutions to this Question

**I'm building my own machine using your motors and drivers. What is the best dip switch settings for the 3.0 amp drivers powering the 425 oz motors**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.**Click the link to respond:**

I'm building my own machine using your motors and drivers. What is the best dip switch settings for the 3.0 amp drivers powering the 425 oz motors**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 respond:**

With a 1/2 lead screw what is the optimal steps for the stepper motor driver 1/16, 1/8, 1/4 etc**How do I order the 10 TPI 5-start 2-turns-per-inch screws?, just shows $ per inch with no option for lenght.**When purchasing the 1/2" 5 start lead screw, the length is based on the quantity. Specify the total length you will need and we will email you (if you don't contact us first) to determine the cut lengths.

For example, if you desire 36 inches of lead screw for the X axis and 12 inches of lead screw for the Y axis, just purchase 48 inches of lead screw and tell us you need this lead screw cut so you have two lengths at 36 inches and 12 inches.**Click the link to respond:**

How do I order the 10 TPI 5-start 2-turns-per-inch screws?, just shows $ per inch with no option for lenght.**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**Click the link to respond:**

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.**What are the dipswitch settings for the drivers?**blueChick:

X-axis

“CW230 (3.0A) Driver”

Set to 1/16 Microstep, 2.7A

Dipswitches: 11001100

Mach3 Motor Tuning: 1422.22 steps/in

Y-axis

“CW230 (3.0A) Driver”

Set to 1/16 Microstep, 2.7A

Dipswitches: 11001100

Mach3 Motor Tuning: 1422.22 steps/in

Z-axis

“CW230 (3.0A) Driver”

Set to 1/4 Microstep, 2.7A

Dipswitches: 10101100

Mach3 Motor Tuning: 1600 steps/in

blackToe:

X-axis

“CW230 (3.0A) Driver”

Set to 1/16 Microstep, 2.7A

Dipswitches: 11001100

Mach3 Motor Tuning: 1422.22 steps/in

Y-axis

“CW230 (3.0A) Driver”

Set to 1/16 Microstep, 2.7A

Dipswitches: 11001100

Mach3 Motor Tuning: 1422.22 steps/in

Z-axis

“CW230 (3.0A) Driver”

Set to 1/4 Microstep, 2.7A

Dipswitches: 10101100

Mach3 Motor Tuning: 1600 steps/in

blackFoot:

X-axis

“CW8060 (6.0A) Driver”

Set to 1/16 Microstep, 2.7A

Dipswitches: 11001100 (“0”=down, “1”=up)

Mach3 Motor Tuning: 914.29 steps/in

Y-axis

“CW230 (3.0A) Driver”

Set to 1/16 Microstep, 2.7A

Dipswitches: 11001100

Mach3 Motor Tuning: 1422.22 steps/in

Z-axis

“CW230 (3.0A) Driver”

Set to 1/4 Microstep, 2.7A

Dipswitches: 10101100

Mach3 Motor Tuning: 1600 steps/in

greenBull:

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

Scratch-Build / Book-Build Kit:

X-axis

“CW230 (3.0A) Driver”

Set to 1/4 Microstep, 2.7A

Dipswitches: 10101100 (“0”=down, “1”=up)

Mach3 Motor Tuning: 1600 steps/in

Y-axis

“CW230 (3.0A) Driver”

Set to 1/4 Microstep, 2.7A

Dipswitches: 10101100

Mach3 Motor Tuning: 1600 steps/in

Z-axis

“CW230 (3.0A) Driver”

Set to 1/4 Microstep, 2.7A

Dipswitches: 10101100

Mach3 Motor Tuning: 1600 steps/in

Additional Information:

Additional Information:

Scratch built/book CNC with NEMA 34 motors and CW8060 microstep driver

Additional Information:**Click the link to respond:**

What are the dipswitch settings for the drivers?**How to determine lead screw length needed. My Thomson 1 1:4 rails are 60 inches long roughly for the router I’m building. I know I have to have it long enough to couple up with the stepper motor of course but does it matter if it’s a little long on the other end**It generally does not matter if it is longer at the other end as long as the lead screw provides the desired travel for that axis. The lead screw will only need to be long enough for the travel, plus any structure and lead-nut positioning.

For example:

- The motor that will turn the lead screw will need to be mounted at some position (generally at one end of the axis). In many cases, this positioning will be mounted where some of the lead screw will not be used (the lead nut will not be able to moved close to the coupling of the lead screw to the motor shaft). Add some of the length of the lead screw to be inserted into the coupling.

- If the lead screw will contain bearings at either end of the travel, that portion of the mechanical assembly will need to be considered in the lead screw length.

- The lead-nut will need to be mounted in a position on a structural member of the part that is to move. The distance from the part of the structure that will extend closest to the motor will have some distance to the position of the lead nut. This distance will need to be added to the lead screw length.

Add these discrepancies to the length of the lead screw and the travel length and you will have the final length.**I need the calculation to determine the stepper motor torque to find the load that it can withstand in horizontal position 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**Click the link to respond:**

I need the calculation to determine the stepper motor torque to find the load that it can withstand in horizontal position using a lead screw at 1/2" diameter with 13 TPI.**how long are your lead screws 3/8 and how much ? looking for 3/8 see my previous question what is the minimum length and how much per inch**We currently only stock 2 start lead screw for the 3/8".

**Click the link to respond:**

how long are your lead screws 3/8 and how much ? looking for 3/8 see my previous question what is the minimum length and how much per inch**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**Click the link to respond:**

I am asking what to set my steps per using your kit stepper motors and a 1/2"x13 lead screw with Mach3**What are the overall dimensions of the 2.5A small stepper drivers? Is there a CAD model available?**The overall dimensions of our 2.5 modular stepper divers is:

L: 1.875"/ 47.625mm

W: 1.433"/ 36.3982mm

H: .585"/ 14.859mm (height might change due to different terminal block height (other we have on hand is .464"/ 11.7856mm))

Currently we do not have a CAD model on hand.**Click the link to respond:**

What are the overall dimensions of the 2.5A small stepper drivers? Is there a CAD model available?**What is the 24VDC Power requirement for the Pokeys47CNC? 1A, 2A? ...I'm running a separate 36VDC PS to the Stepper drivers and a 24VDC PS to the Controller.**Polabs prepared step by step user guide for PoKeys57CNC and Mach4 to try answering such questions. It is available in our downloads section: https://www.poscope.com/wp-content/uploads/downloads/Pokeys/LibrariesAndPlugins/Mach4 and PoKeys57CNC - step by step guide.pdf

**Click the link to respond:**

What is the 24VDC Power requirement for the Pokeys47CNC? 1A, 2A? ...I'm running a separate 36VDC PS to the Stepper drivers and a 24VDC PS to the Controller.**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?**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**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?**I ordered the 3-axis medium stepper motor kit. The drivers i recieved were those for the 3-d printer main board, not the modular ones. How am i suppose to wire that up now?**Please contact customerservice@buildyourcnc.com so we can assist you.

**Click the link to respond:**

I ordered the 3-axis medium stepper motor kit. The drivers i recieved were those for the 3-d printer main board, not the modular ones. How am i suppose to wire that up now?**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.**Motor tuning. While motor tuning what are the recommended steps per inch, velocity, and acceleration for the BlackFoot CNC?**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**Click the link to respond:**

Motor tuning. While motor tuning what are the recommended steps per inch, velocity, and acceleration for the BlackFoot CNC?**Hi, I need the lead screw and bearings for x/y/z axis of the CNC. What is the length of "1/2" Lead Screw per inch (Steel)"?**Depending on the size of your CNC machine, it will vary the length required for your application.

Please verify the CNC machine, and we can go into detail on the specific lengths or methods for the linear guide mechanics.

We sell our ACME Screw (1/2" per inch), also our longest length of ACME Screw is 76-3/4".**Click the link to respond:**

Hi, I need the lead screw and bearings for x/y/z axis of the CNC. What is the length of "1/2" Lead Screw per inch (Steel)"?**On the book build machine I changed the Z axis from a 13 tpi lead screw to an acme 10 tpi 5 start lead screw. What numbers do I put into the motor tuneing boxes.**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! (

)**Click the link to respond:**

On the book build machine I changed the Z axis from a 13 tpi lead screw to an acme 10 tpi 5 start lead screw. What numbers do I put into the motor tuneing boxes.