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### Question #: 14150

Question: Hi, I’m purchasing an ox build workbee cnc router from China but I need to purchase the spindle mount, router and all cables/wires. Please can you give a list and quote of what I will need? I am purchasing the electrical pack with it but it doesn’t come with the cables and all other bits I need. Thank tou

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Hola puedo venderte una maquina nueva completa chocofrutfc@yahoo.es

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• thank you for the reply. I would be really good to know the calculation. The lead screw is 1/2" diameter with 13 TPI. Please provide the calculation for determing the maximum weight motor can handle on Z-axis on book build cnc. And one more question. If I am cutting 18mm MDF with 6mm cutting bit (so 6mm pass), what can be the maximum speed rate of cutting and spindle speed of router? thank you

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)

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

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

Pls

1m 16mmdiameter ball screws calculations

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.

1

• I am considering the purchase of a Black foot or Green Bull CNC router and would like to come and visit your facility to see them in person and to discuss my requirements. Please can you tell me your address. I am based in NW Houston. Many thanks.

If you would like to come to the office, please call the office at 281-815-7701 to request a visit at your specified time within our business hours so we can make sure that the right person will be there to assist you.

• I am looking at getting a 4x8 cnc router kit. I am having a hard time figuring out what is included in the kit and what else i will need to buy with it to get off the ground and running. Is there someone i could talk to to walk me through it? If not, can you break down what all I need to go from scratch to a running set up? thanks

Hi, you can call me at the 281-815-7701 number. Please leave a message when you call as most of the calls are screened to avoid scam calls. You can also email me at customerservice@buildyourcnc.com or phooddaniel@berkeley.edu.

The newer kits that are featured on the home page include everything you need except a computer and software. The legacy CNC routers that are located in the CNC machines menu selection include all of the parts for the gantry, but you will need to build the table yourself. All of the information on the measurements to be followed for the table construction are on the machine pages.

• [77] Hello. I’m interested in buying a water cooled spindle and VFD. I have an Avid Pro CNC and would love to control it using Mach 4 but I keep hearing it’s difficult to integrate. Also, is the water pump 120 or 240? I’d love any advice etc. eBay is a web of confusion with all of the options. Thank you.

You will need to look for the parameter that controls the run frequency. The frequency can be controlled bu the panel, external terminals, or the RS485 TX/RX terminals (UART protocol). You will want to change that parameter so it uses the panel. If you are referring to the maximum panel dial frequency is only allowing 200-300 rpm, then look for the parameters to control the frequency.

For 200 RPM:
Hz = 200/60 = 3.33 Hz

For 300 RPM:
Hz = 300/60 = 5 Hz

Conversion to RPM:
If you ever find yourself yearning to reverse-engineer the process, the formula is as follows:

RPM = Hz × 60

Look for values that match somewhere between 3 and 5 in your frequency parameters and replace them with 400 to give you 24,000 RPM max.

• I'm interested in purchasing your black tooth laser engraver and am curious what setup to get. I already have a cnc wired via parallel port to my PC. Do I need to purchase the black tooth laser with the integrated computer or can I just disconnect my current cnc's parallel port and connect it to the black tooth laser engraver? Also is the black tooth 110v?

If you have an existing PC with a parallel port you will not need to purchase the onboard computer system on the blackTooth laser cutter and engraver. You will want to purchase the blackTooth laser engraver that comes with the parallel interface (breakout board). If you have an existing CNC machine that is being used with this PC, you can disconnect the CNC machine and connect the blackTooth to this PC. You will want to have two configurations for your control software.

We have a version of the blackTooth that is 110v and 220v. We generally determine which is sent according to the requirements of the customer and in what country they live.

20

Parallel Port Configuration BIOS settings and Mach 3.

• Hi, I have watched your vids on YouTube and I am interested in purchasing one of your USB Break-Out Boards. I currently own and use FlashCut CNC software, which is USB based, on all of my machines. I'm wondering if you could tell if the Flashcut software will talk with the USB Break-Out Board? Thank You

Currently our USB breakout board is only compatible with Planet-CNC software as it has to be registered with Planet-CNC.

• HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

BYCNC response:

Milling aluminum is no problem with our machines.

Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

User response:

User response:

BYCNC response:

• HI, I HAVE INTENTION OF PURCHASING YOUR 1/2 INCH PRECISION LEAD SCREW SET TO BUILD MY CNC MACHINE, COULD THE SCHEMATIC DIMENSION ANTI-BACKLASH NUT, BEARING FOR AND SHIM? ALSO IS 2.2KW SPINDLE ABLE MILL ALUMINUM WHAT ACCURACY?

BYCNC response:

Milling aluminum is no problem with our machines.

Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

User response:

User response:

BYCNC response:

• Hi, I have intention of purchasing your 1/2 inch precision lead screw set to build my CNC machine, could I have the schematic dimension of your 1/2 inch anti-backlash nut, bearing for the lead screw and the shim? Also is your 2.2kW spindle able to mill Aluminum and what is the accuracy?

BYCNC response:

Milling aluminum is no problem with our machines.

Here is a video we recently did with our 4'x8' machine. The aluminum piece is about 1/4" thick: https://buildyourcnc.com/tutorials/tutorial-greenbull-aluminum-cutting

The accuracy you will see from our our 2.2kW spindle is entirely dependent on the precision of your build, so it's not possible to say what level of accuracy you can achieve without an examination of the complete system. However, our spindles have a runout of less than .0001 in, which includes the collets that we sell. If you use a collet from another manufacturer, we cannot guarantee this TIR (Total Indicated Runout) dimension.

User response:

User response:

BYCNC response:

• Hi, I am very interested in this CNC Router unit [4'x8'], but from South Africa with our exchange rat [1\$ =13,4 ZAR presently, make these kits out of reach. The plans part has been discontinued, but in our situation, would you reconsider and supply full plans and instructions at a cost? please let me know.

Dealing with a 4' x 12' machine, our blackFoot kit will be your best option. Since our machines are only limited to the width but not length wise, you can add however much extra rail and roller chain to accommodate your extended length. Now adding our 4th axis kit (https://www.buildyourcnc.com/item/axes-4th) will be needed for your 4th axis (unless custom design is required).

These items will be the best requirements to build a 4' x 12' 4th axis machine.
Machine (either parallel/USB BoB): https://www.buildyourcnc.com/blackFoot48v40.aspx
4th axis: https://www.buildyourcnc.com/item/axes-4th

• Hi, I am very interested in this CNC Router unit [4'x8'], but from South Africa with our exchange rat [1\$ =13,4 ZAR presently, make these kits out of reach. The plans part has been discontinued, but in our situation, would you reconsider and supply full plans and instructions at a cost? please let me know.

We are toying with the idea of re-introducing plans for some of our machines. Please give us a call to discuss further.

• [789] I need to level my cnc machine, but I didn't purchase it from you, so: Do you offer tech support with leveling a cnc? Because I don't see this problem listed .And: Do you offer support if my machine was purchased in China or from another vendor?

Yes, we can help you with leveling your CNC machine even if you didn't purchase it from us.

• I have a cnc router that was built from the book "Build your own cnc machine" by james kelley and patrick hood daniel.all the parts were purchased from your company.I have no clue how to work the machine and I need to purchase a spindle (or router) bits , softwear ect , I did mention I don't know how to use the machine !!! Thanks for your help Richard

That is a very loaded question that could be replied in so many ways. I will need a more specific question to help you. For instance, I have my machine moving in different directions, but I don't know how to make the machine move according to g-code instructions. Another question could be, I connected all of my electronics and the motors are not moving and I did all of the steps on the electronics video to troubleshoot the problem.

• I'm trying to build my CNC router 3m*1.3m, but i'm not sure what is the type of stepper motor i should pay, all my CNC body is Al. I need to bay 4 Stepper motors, 4 drivers, spindle, inverter, and i don't know what is the type of controller ?

The size of the stepper motor is measured in holding torque, generally oz/in. You will determine the torque loads of your axes when selecting steppers. Once you know which stepper you need, the drivers and controller board are simple to pair with them.

• I am trying to purchase a kit for our school in Singapore, and your site keeps refusing our corporate AMEX card. Can you help us figure out what is up with that? Are you not ship to Singapore or something? Our AMEX rep says that the account is authorised for this purchase from our end, so the problem may be with your site? Please advise.

• good day I have my list of products in the cart, and before making the purchase need to ask 1. I need to know if I can pay by bank card HSBC Visa 2. If I pay today, As approximate time come to Mexico City? 3. Ordered the shipping information online, and I chose standard UPS. There may be changes in the amount? Thank you

We accept many forms of payment, but online, we accept major credit cards (Discover, Visa, MasterCard and American Express) in addition to checking out with Paypal. Depending on what is ordered, a machine vs. a la cart parts, will arrive at your destination according to the shipping method chosen. A machine may take an extra week to be delivered.

Once paid, there are no changes in the amount for the purchase.

• I am making my own CNC setup using all the electronics from your website and I have many questions. Please advise how to have my computer recognize the USB connection from my breakout board also I would like to use a water cooled spindle but I need to know the parts required for a 4x10 bed area used for woods and plastics

You will need PlanetCNC software for the USB breakout board and when plugging in the USB the computer should automatically recognize the board, however you can go into device manager to see if the USB terminal is working correctly.
The parallel breakout board; the USB is not a connection terminal rather than a power source, and the parallel port will be the communication terminal.
The items you will need for a water cooled spindle would be: water pump, silicon tubing(length desired by customer), a extension cord(from a hardware store(orange))(1 same gauge wire/length as extension cord).

• I am looking at purchasing your 2.2 kw water cooled spindle. I'm assuming it comes with the VFD. I have a rotary phase converter in my shop. Are these spindles 3 phase? And if so, can I bypass use of the VFD and control the spindle speed by the CAM software instead? Or is the VFD an absolute necessity to use on the spindle?

Identify the Control Signals: First, determine which control signals from the DB25 interface card are used for spindle speed control. Typically, these are PWM (Pulse Width Modulation) signals or analog voltage signals.

VFD Configuration: Your VFD should be configured to accept the type of control signal your DB25 card provides. This involves setting parameters in the VFD that correspond to the type of input signal it will receive for speed control.

Wiring: Connect the appropriate output pins from the DB25 card to the input terminals on the VFD. This usually involves connecting the PWM or analog output to the corresponding input on the VFD. Make sure to consult the manuals for both your VFD and interface card for specific wiring details.

UCCNC Settings: Configure UCCNC to output the correct type of signal (PWM or analog) that matches your VFD's configuration. This is done through the software's spindle setup section.

Test and Adjust: Run some tests to ensure that the spindle speed is being correctly controlled by UCCNC. You might need to tweak settings in either the VFD or UCCNC for optimal performance.

• You state "If you purchase cabling, we will solder the cable to the spindle and connect the cable to the VFD." I didn't see that when I purchased my spindle and vfd. If I place an order for the wire and another female adapter, will you please solder the connector to the wire?

When did you purchased the VFD and spindle? We only started this after the date of the instagram post that offered this added service.

I purchased it July 16, 2020 however due to all the 2020 issues, I'm just now completing my CNC and hooking up the VFD and Spindle.

The service started on Sept 23, 2020. Your order was prior to that.

The soldering is straightforward. If you wish to have me provide this extra service, feel free to send the unit back with the cable and I will solder the cable and do the parameter check and test the VFD and spindle.

When I purchased my VFD and Spindle, I forgot to purchase the wire for the spindle. I had an electrician run a 220 line and hook up the VFD. But I don't have the wire for the spindle. I'd like to get the one you recommend and just pay you for another connector and the soldering.

Can I purchase the one you spindle wire you recommend and just pay you for another connector and the soldering.

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