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### Question #: 13369

Question: Your book states to cut lead screws to length, are they soft enough to use a hacksaw?

Current Solution

Yes, you can use a hack saw as these lead screws are not hardened.

Respond:

### Other Possible Solutions to this Question

• What are the other two dimensions of the 1/2" ID bearings used to support lead screws?

Inside Diameter: 1/2" (actual dimension 0.4975 inches or 12.63 mm)

- Outside Diameter: 1.122 inches or 28.4988 mm

- Thickness: .31 inches or 7.89 mm

Thank you for this question as it caused me to update the description:
https://www.buildyourcnc.com/item/bearing-!5-standardbearing

What are the other two dimensions of the 1/2" ID bearings used to support lead screws?

• how long are your lead screws 3/8 and how much ? looking for 3/8 see my previous question

We currently only stock 2 start lead screw for the 3/8".

how long are your lead screws 3/8 and how much ? looking for 3/8 see my previous question

• Can’t find info about all three lead screws in you book or how to secure them

The details will differ depending on the type of lead screw you use.

For allthread lead screws, you will need the 1/2" square nut, 1/2" allthread lead screw, two 1/4" screws and nuts to hold the square nut in place, two 1/2" ID bearings, two standard 1/2" nuts, and one coupling hub.

Attach the square nut to the nut support using the two 1/4" screw and nuts. The bearings will need to be inserted into the seats of the lower and upper part of the z-axis. Insert the lead screw through the top bearing. Use one of the standard 1/2" nuts and start threading it on the allthread screw just below the bearing. Lower the lead screw to the square nut and start to screw the lead screw into the square nut. Continue until the screw is near the lower bearing. Add another standard 1/2" nut to the screw and keep turning the screw until the screw just passes the lower bearing. Add the coupling hub to the top of the screw just above the upper bearing. Turn the lower and upper standard 1/2" nuts until they are snug against the bearing. If the standard 1/2" nuts become loosened, consider adding another nut to each end against the existing nut to keep them in place.

For 1/2" acme 5 start lead screws, you will need to use an antibacklash nut in place of the square nut. This nut attaches with a flange using two #8 screws and nuts. The standard 1/2" nuts are replaced by clamping collars.

Can’t find info about all three lead screws in you book or how to secure them

• Are there contour type brushes available for leadscrews and round rails

Yes, you can use these flexible strip brushes and create a mount for the contour that you need:

https://www.buildyourcnc.com/item/strip-brush

Are there contour type brushes available for leadscrews and round rails

• WHAT SOFTWARE CAN BE USED WITH THE BLACKTOOTH LASER CUTTER?

If you take the standard parallel cable BoB (Break Out Board), then you will need control software (Mach 3 or EMC2) and CAM software to make your G-Code (such as CamBam). Personally I use CamBam and Mach 3, they work beautifully but don't expect to turn them on and know how they work out of the box. Give yourself a few weeks to get familiar with the basics. CamBam is VERY powerful software for it's price. I'm surprised how much I keep learning on what I can do with it...I highly recommend it if you want as much control as possible.

Mach 3 + CamBam as a bundle costs \$310. EMC2 will give you a free replacement for Mach 3 and is exclusively for Linux.

If you use the USB BoB, it will cost an extra \$75 + \$75 for the software. This is an all-in-one package so no need for Mach 3 or CamBam.

For etching rasters (jpeg, bmp, tiff, non-vectors, photos), I highly recommend PicEngrave. It has been a labor of love for the past 9 years and John has done a wonderful job with it. It easily compares in quality compared to software that is in the \$200-\$300 range. John's software runs \$40 and can be found here: http://picengrave.com/ (don't let the modest website fool you, this stuff can do amazing things). DotG and the Mach3 engrave plugin are two other options and instructions can be found on Dustans page in the gallery on buildyourcnc.com website.

WHAT SOFTWARE CAN BE USED WITH THE BLACKTOOTH LASER CUTTER?

• WHAT SOFTWARE CAN BE USED WITH THE BLACKTOOTH LASER CUTTER?

I would say mechanically, between the official build instructions, Warren's awesome blog (http://blacktoothlaser.blogspot.com/) and the tips in the forum, the blackTooth is a really simple build. The challenges come with electronics and software. There's a number of different ways to drive the laser and motors. A decent understanding of electronics and computers is a must.

WHAT SOFTWARE CAN BE USED WITH THE BLACKTOOTH LASER CUTTER?

• I have the AVR programmer USBasp. Should I download and use the sparkfun driver as your tutorial states?

I created videos that explain how to setup and install the USBasp here:

&index=3&list=PLE72E4CFE73BD1DE1

Do not use the video that show the setup of the USBTiny.

Also, use this video that continues the USBasp installation.

&index=4&list=PLE72E4CFE73BD1DE1

• 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".

• are these shipped directly from China or are they already in the United States?

The products that we sell are shipped from the United States. The origin of many of the products are from China, but they are held here in our facility and shipped from our facility in the United States.

are these shipped directly from China or are they already in the United States?

• Hi, I need the lead screws and bearings for the 4' x-axis, the 2'(?) y-axis and the 1'(?) z-axis as specified in the book 'Build your own cnc'. I am not sure which to order on your website. Thanks

You can find the required components for our scratch build CNC here(https://buildyourcnc.com/cnckitintro.aspx).

X-axis: 52 Inches
Y-axis: 32 Inches
Z-axis: 14 Inches

These will be the bearings that are specified that will be needed:
Bearings 1/2" Inside Diameter - 6
Bearings 5/16" Inside Diameter - 24

• What size forstner are used in the book build your own cnc

That was a very long time ago, but I think I was using 3/4". You can use a size just larger than the outer width of the nut.

What size forstner are used in the book build your own cnc

• Does your hardware & software support adding a 4th and 5th axis to the Black Tooth?

The blackTooth is a laser cutter/engraver, and its current design directs the beam in 2 dimensions (X and Y) over the surface of a workpiece which is assumed to be lying flat beneath the laser head. There is no mechanism to move the Z-axis directly. There is likewise no direct provision to move either the workpiece or the laser head for a 4th or 5th axis of operation because that would change the optical path and/or the focal point. However, you could certainly add a 4th axis to move a workpiece beneath the laser head -- it would be an interesting project, and if you do it we would like to see pictures.

The ability of the software to support this addition depends upon which software you are using. If you are using a breakout board and machine control software designed for conventional CNC mills, such as Mach3, LinuxCNC, or PlanetCNC, then the answer is yes, the software will support the 4th axis quite easily. If you are using the integrated laser controller, the adaptation would be more difficult.

Does your hardware & software support adding a 4th and 5th axis to the Black Tooth?

• Just bought Build Your own CNC Machine book. It is missing the chapter on lead screws that is described on page 181 at the end of Chaprer 16. Where can I get this info?

It sounds like you got a misprinted book. If you purchased it from us, please contact us directly for a replacement. If you bought it from Amazon or a third party, you'll need to contact them. General information about lead screws is available on this website and at buildyourtools.com.

• Do you sell leadscrews and ballnuts that are 5 TPI? I'd like 0.001" per step, using a 200 steps/rev (1.8 degree) motor.

We sell leadscews and anti-backlash nuts at the moment. Ballnuts will be available from us in the future.

Specifically to your question, you want 0.001" resolution:

The formula: (we are looking for a minimum of 1000 steps per inch
steps = (motors steps)/(travel with one motor rotation)

steps = (200 natural motor steps) x (microsteps ) / 0.5" travel (1/2" leadscrew 10 TPI 5 Starts)

steps = 200 * microsteps / 0.5"

multiply both sides by 0.5":

steps * 0.5" = 200 * microsteps

divide both sides by 200:

(steps * 0.5") / 200 = microsteps

replace steps with 1000:

(1000 * 0.5") / 200 = microsteps

500 / 200 = microsteps

2.5 microsteps will provide .001"

I would recommend 4 microsteps (1/4 microstepping), so your formula will be as follows:

steps = steps/inch = (200 * 4) / 0.5" = 800 / 0.5" = 1600 steps/inch

• I couldn't find any information about how to mount the "z-axis lead screw in the book" (Build Your Own CNC)

The details will differ depending on the type of lead screw you use.

For allthread lead screws, you will need the 1/2" square nut, 1/2" allthread lead screw, two 1/4" screws and nuts to hold the square nut in place, two 1/2" ID bearings, two standard 1/2" nuts, and one coupling hub.

Attach the square nut to the nut support using the two 1/4" screw and nuts. The bearings will need to be inserted into the seats of the lower and upper part of the z-axis. Insert the lead screw through the top bearing. Use one of the standard 1/2" nuts and start threading it on the allthread screw just below the bearing. Lower the lead screw to the square nut and start to screw the lead screw into the square nut. Continue until the screw is near the lower bearing. Add another standard 1/2" nut to the screw and keep turning the screw until the screw just passes the lower bearing. Add the coupling hub to the top of the screw just above the upper bearing. Turn the lower and upper standard 1/2" nuts until they are snug against the bearing. If the standard 1/2" nuts become loosened, consider adding another nut to each end against the existing nut to keep them in place.

For 1/2" acme 5 start lead screws, you will need to use an antibacklash nut in place of the square nut. This nut attaches with a flange using two #8 screws and nuts. The standard 1/2" nuts are replaced by clamping collars.

• how many controllers board will i be able to used per one purchased of usbcnc software?

We do not sell PlanetCNC licences directly, but our understanding from customer input is that PlanetCNC requires a license for every board. For complete and up to date information, you would need to contact PlanetCNC directly.

how many controllers board will i be able to used per one purchased of usbcnc software?

• I was referred to your company by a friend who uses your products and i notice you have finance / lease options, are these available to people outside the United States? Im located in Canada

I do believe the financing is available for those outside the US but let me make sure.

• HAVE CAD FILES (.DWG AND .DWF) FOR THE GUITARS. HOW DO LOAD THEM INTO PLANT CNC SOFTWARE USE?

You will need a cam program to create machining operations for the geometry in the .dwg file. The CAM program outputs these machining operations into g-code for the control program (planet-cnc) to use.

I have a couple of tutorials that explain this concept.

The following is an older video but get's the point across:
http://www.buildyourcnc.com/process1.aspx

HAVE CAD FILES (.DWG AND .DWF) FOR THE GUITARS. HOW DO LOAD THEM INTO PLANT CNC SOFTWARE USE?

• If I buy the 1/2" 5 start lead screw and the 3/8" 5 start lead screws will it all work together

If the turns per inch on a lead screw is different, then the nut on the lead screw will move at a different velocity.

Let me explain in more detail.

Let's say you have two lead screws:

- 1/2" 5 starts at 10 TPI = 2 turns per inch. (5 starts / 10 TPI = 1/2 inches per turn or 10 TPI / 5 Starts = 2 turns per inch.)

- 3/8" 2 starts at 10 TPI = 5 turns per inch. (2 starts / 10 TPI = 1/5 inches per turn or 10 TPI / 2 starts = 5 turns per inch.)

So, if two stepper motors (one connected to the 1/2" lead screw and the other connected to the 3/8" lead screw) turned 10 revolutions in 2 seconds, the 1/2" lead nut would travel 5 inches and the 3/8" lead nut would travel 2 inches at the 2 second mark.

If I buy the 1/2" 5 start lead screw and the 3/8" 5 start lead screws will it all work together

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