The potentiometer for the speed header on the usb interface is used as a voltage divider, so the ohm value is just going to portion the voltage rather than output a resistance. You can use many values, but I would use a value of around 5k ohms.

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USB CNC Keyboard Speed Pot Size?

PC with parallel port and USB port
20awg stranded wires for the motors - http://www.buildyourcnc.com/electronicscombo.aspx
18awg stranded wires for power supply to drivers
24awg stranded wires for breakout board to drivers
(location and spacing of components varies from one person to another, so we do not provide cables/wires)
- General purpose extension cord (cut the female end off) to provide power to power supply
- USB cable to power breakout board
- Parallel cable to communicate to breakout board
- Router
- (optional - instead of router) Spindle with power inverter http://www.buildyourcnc.com/SpindlesAndAccessories.aspx
- (if purchasing spindle with inverter) General purpose extension cord (240v) (cut the female end off) to provide power to power inverter
- End Mill(s) http://www.buildyourcnc.com/ProductsEndMills.aspx
- CAD, and/or CAD-CAM software (to produce geometry, machine operations, and g-code) http://www.buildyourcnc.com/CNCsoftware.aspx
- CNC control software (to read g-code and control machine) http://www.buildyourcnc.com/CNCsoftware.aspx
- If the machine does not have the table included, then a table will need to be built. The rails, chain and chain mounts are included that are used on this table.

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can you please clarify exactly what I receive w/ 5' x 10' CNC machine kit and what additional items I would need to have a fully operational machine?

The pinout of the USB interface's keyboard job interface can be found here at the usb interface page:
https://www.buildyourcnc.com/item/electronicsAndMotors-electronic-component-USB-Controller-Breakout#prettyPhoto/2/

Scroll down to the instructions below the description and it's the first instruction step. Click on the picture. Just copy and paste that link into the address bar and the diagram should appear.

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What is the pinout of the 12-pin keyboard jog header on the V2.1 CNC USB controller?

Yes, you can send your electronics to us for repair, or retrofit to work with either Mach3, Mach4 or LinuxCNC. You can send us an email at customerService@buildyourcnc.com to set up your appointment.

Some of the types of CNC electronics we will consider.

- We will work on electronics from other manufacturers as long as you are ok with the Mach3, Mach4 or LinuxCNC control software for your CNC machine or CNC router.

- We will repair or retrofit used CNC electronics.

- Some customers find that electronics are overwhelming to put together so we will finish these electronics wiring and assembly for you.

The cost for these includes labor cost for the time it takes to finish the CNC electronics repair or retrofit and for any parts that need to be replaced or added.

Here is an example of CNC electronics that we worked on for a customer:

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Can I send used CNC electronics to you for a retrofit?

Yes, you can send your electronics to us for repair, or retrofit to work with either Mach3, Mach4 or LinuxCNC. You can send us an email at customerService@buildyourcnc.com to set up your appointment.

Some of the types of CNC electronics we will consider.

- We will work on electronics from other manufacturers as long as you are ok with the Mach3, Mach4 or LinuxCNC control software for your CNC machine or CNC router.

- We will repair or retrofit used CNC electronics.

- Some customers find that electronics are overwhelming to put together so we will finish these electronics wiring and assembly for you.

The cost for these includes labor cost for the time it takes to finish the CNC electronics repair or retrofit and for any parts that need to be replaced or added.

Here is an example of CNC electronics that we worked on for a customer:

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Can you finish putting my CNC electronics together for me?

Yes, you can send your electronics to us for repair, or retrofit to work with either Mach3, Mach4 or LinuxCNC. You can send us an email at customerService@buildyourcnc.com to set up your appointment.

Some of the types of CNC electronics we will consider.

- We will work on electronics from other manufacturers as long as you are ok with the Mach3, Mach4 or LinuxCNC control software for your CNC machine or CNC router.

- We will repair or retrofit used CNC electronics.

- Some customers find that electronics are overwhelming to put together so we will finish these electronics wiring and assembly for you.

The cost for these includes labor cost for the time it takes to finish the CNC electronics repair or retrofit and for any parts that need to be replaced or added.

Here is an example of CNC electronics that we worked on for a customer:

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Can you repair the electronics on my CNC machine?

You can see the component list on the hardware and plans machine (scratch build machine) since it is the same machine in the book:

https://www.buildyourcnc.com/Item/cnc-machine-scratchbuild

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Your book claims that plans are available for download, not purchase; the "plans" included in book are illegible and sometimes dimensions omitted - e.g. Fig 3.6 is cutout plan but dimensions are missing from dimension arrows. Your call to provide or not provide plans on the website but should not claim to if you will not. I'll hold my putting review on Amazon until I hear back from you. All I'm asking for is legible dimensions - PDF format will work but I'll ANY legible format. Thanks for your consideration.

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A PDF version of the plans are available here: https://www.buildyourcnc.com/Book.aspx

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I bought Kindle version of DIY CNC book; pictures are illegible. I can't find a place to download actual PDF plans on site. Can you please provide a link? Thanks

Yes you can. We well the ArtCAM software and modules.

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I SEE ARTCAM MODULES ON YOUR SITE, CAN STILL GET THEM THROUGH YOU?

These files are no longer available. We suggest purchasing a kit, like the blackToe, or blackFoot as these kits are far more rigid and perform much better.

https://www.buildyourcnc.com/blackToe2x4v40.aspx

https://www.buildyourcnc.com/Item/cnc-machine-blackFoot-v4

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Would you be able to provide .DWG/.DXF files instead of .NC files for the CNC Routing Machine Kit Version 1.3 please?

We don't have a laser kit to retrofit another CNC router other than ours, but we can create one. Some things that may help:

- You are located close to use so we can work closely with you to implement to retrofit,
- or you can provide very detailed drawings or measurements so we can use them to create the necessary parts for the kit.

Other things that you need to understand:

- A laser has a number of parts that will bulk up the head of the CNC router causing a bit more inertia which may require lowering the acceleration for smooth ramping up and down of the velocity

- The bulk of the parts required for the laser may restrict the travel of the x and/or y axes.

- The nozzle of the laser will be offset from the end mill of the spindle.

Can you tell me the brand of the CNC router that you would like to stick a laser on? (you can answer by submitting additional information.

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Do you have a laser kit that can be fitted onto another brand CNC router?

Yes, the blueChick kits are available. You can get the shipping rates automatically in the shopping cart. There will be a calculate shipping button on the enter shipping information section of the shopping cart.

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CAN YOU PLEASE TELL ME THE AVAILABILITY OF 12X36 BLUE CHICK 4.2, AND COST FOR SHIPPING TO ZIP 72802 IN RUSSELLVILLE, ARKANSAS?

We already have a system that meets those needs:
https://buildyourcnc.com/images/machineConfigurations/greenBullV2_size_04x08_angle_flat_f1_no4thaxis_f2_wilasergantry_f3_nolaser_f4_wilaserready_.png

You can find that machine on the home page. It's the first machine on the page and all you need to do i click on the "Add A Laser" button at the top left of the image.

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Good day to you! We haven't communicated in quite some time! I am still wanting to pursue a 4 x 8 CNC spindle and 80kw laser system! Please respond so we can put this together!

Yes, we have a 4 axis combo kit available under Motion Electronics.

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Can you supply an electronics package for a dual x-axis CNC machine (X, Y, Z)

As long as the bearing has a minimum thickness of 1/4" and 9/32" is a bit thicker, there will be no problem with the book build using the bearing that is 1/32" thicker. There is actually more surface area which is better.

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in your book - Build you own CNC Machine. Can I use 9/32" thick bearing instead of 1/4" thick?

Cutting aluminum is not a problem with our machines, as long as it is acquainted with a decent aluminum end mill and spindle, and the feedrates and speeds are being follow from the manufacture of the end mill.
Now to have a 3" cutting depth, it is possible even up to our smallest machine (blueChick). I would recommend our blackToe due to the fact that you will have a bit of playing room if any other projects or requests might arise.

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Do you have a cnc kit that can cut 2-3" deep aluminum blocks and costs <$3,000?

If you want to run a greenBull CNC machine using a generator, The generator will need to allow for a minimum amount of current draw. Here is a list of items that draw current and how much current (the list does not include the laser option):

Spindle: 10 amps minimum so plan for more.
The power supply for three motors and drivers: 9 amps
The computer to run the control software: varies but out redleaf system would be a max of 2 or so.

So you are looking at about 21 minimum so you will probably need a 25 amp generator.

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Can I run your greenBull CNC off of a generator? If so, what specs would you recommend? Thanks!

Yes, it is found in laser components section

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DO YOU GUYS SELL THE POTENTIOMETER FOR YOUR LASER SYSTEM BY ITSELF

The instructions for assembly are found in the book. If you are interested in purchasing the plans and instructional DVD please see this link https://buildyourcnc.com/cnckitintro.aspx

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I read the book and i want the vedios show assembly the CNC Machines please give me alink for vedios

The electronics (stepper motors, drivers, power supply and interface board) can be found here:
https://www.buildyourcnc.com/item/electronicsAndMotors-3axis-425-elcombo

If your computer cannot connect to the parallel breakout board (the interface card), just make sure to inform us that you need the USB alternative.

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Just purchased the book "Build Your Own CNC Machine". Can I get hardware and electronics kits and how?