Dealing with our 3/8" ACME screw, we intended to use this with a 3D printer machine(primarily) as well as our smaller motors. Which did not need the increased torque ratings as our larger motors, which will use the 1/2" ACME screw with larger machines.

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Why is your 3/8" acme thread only 2 start and your 1/2" is 5 start?

The tolerance of our machines, like any machine, depends on several variables. The major variables include the manufacturing tolerance, the type of machine control used, the precision of assembly, the thoroughness of maintenance, and the initial and ongoing calibration of the machine. Because we sell kits only most of these variables are outside our control. Therefore, we are hesitant to guarantee a certain level of tolerance for an end user. However, in our experience, tolerances of .001" are readily achievable with our machines.

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What is the likely tolerance one could achieve without continual frustration and months of tinkering?

Additional Information:
We actually do very little tinkering with our production machine. The wood has a very small coefficient of linear expansion as compared to metals and plastic, so calibration is reduced to a very infrequent state.

As with all machines, the determination of backlash in all parts of the machine is important, managing the tightening of these points of adjustment is necessary, but are still done infrequently.

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What are the tolerances of your machines?

The largest CNC machine we make at this time (12/04/2015) is the GreenBull 6'x12' model. This model has 2 options for Z-axis travel.

The short-z option has a total Z travel of 5.75 inches. From that you would subtract the length of the end mill used and the thickness of the spoil board to determine the maximum material thickness. (Example: If the end mill extends 1.25" from the collet and the spoil board is .75", then the material could be up to 5.75 - 1.25 - 0.75 = 3.75 inches in thickness). This is good for most sheet-type materials.

The long-z option, used mainly for large 3D carvings, requires a custom frame and allows for up to 36" of travel.

The tolerance of our machines, like any machine, depends on several variables. The major variables include the manufacturing tolerance, the type of machine control used, the precision of assembly, the thoroughness of maintenance, and the initial and ongoing calibration of the machine. Because we sell kits only most of these variables are outside our control. Therefore, we are hesitant to guarantee a certain level of tolerance for an end user. However, in our experience, tolerances of .001" are readily achievable with our machines.

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What tolerance can I expect from your largest cnc machine and the laser cutter? Also, what depth can I get on the z axis?

We can supply 1/2" lead screw with a maximum continuous length of 77 inches.

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Please give me a cost on a 6'x 1/2" lead screw. Thank you

Additional Information:
no

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What is the longest 1/2" Acme lead screw that I can buy?

The stepper motor that we currently use for our 3/8" lead screw, is 100 oz-inch motor on our 3D printer machine. But using the correct coupling you may use a 425 oz-inch stepper motor to run with the 3/8" lead screw.

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What size of stepper drives the 3/8 acme thread and it's anti backlash nut?

It is an M8 metric size on the port going into the spindle, and a 1/4" compression on the other side.

Is the M8 port a M8x1.25 or M8x1?

If you are referring to the book build, use a chamfer bit that is large enough to create a chamfer for most of the edge of the 3/4" thickness of the board, but still has a sliver of space for the bearing on which to ride.

Additional Information:
Mine is M8x1mm. I replaced the stock fitting with a brass hose barb and used "steel wire reinforced vacuum hose" with a 1/4" ID because it resists kinking and collapsing.

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on the 2.2Kw water cooled spindle, what is the cooling port thread type and size?

We honor a one year warranty on most parts like main machine components, structural parts, mechanical parts and some electronic parts including spindles.

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What is the warranty on your 2.2KW spindle

We provide a one year warranty from the date the item is delivered.

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WHAT IS THE WARRANTY ON YOUR PRODUCTS

TIR specifications for the ER-20 collet used on 2.2KW Spindles is .0004 inches.

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What is the maximum runout on your water-cooled spindles?

The strip brush is .2 inches (5.23 mm) wide, so a slot of that width or slightly wider will work. We use a .25 inch groove and use glue to adhere the strip brushes in our dust shoe.

The material of the bristles and the strip that holds the bristles are nylon.

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What is the dimensions and material of the spine on your Strip brushes?

The spindle water inlet and outlet fittings are 1/4 Inside Diameter and 3/8 Outside Diameter.

You can find the silicone tubes here:
https://buildyourcnc.com/item/pneumatic-hydraulic-silicone-tubing

This fitting will connect to the pump (1/2" male to 1/4" female):
https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Female-to-Male

And this fitting will provide a reduced barbed size (1/4") for the tube:
https://buildyourcnc.com/item/pneumatic-hydraulic-Tube-Fitting-Barbed-to-Male

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What is the liquid input and output barb size on your 2.2kw water cooled spindle?

The largest CNC machine we make at this time (12/04/2015) is the GreenBull 6'x12' model. This model has 2 options for Z-axis travel.

The short-z option has a total Z travel of 5.75 inches. From that you would subtract the length of the end mill used and the thickness of the spoil board to determine the maximum material thickness. (Example: If the end mill extends 1.25" from the collet and the spoil board is .75", then the material could be up to 5.75 - 1.25 - 0.75 = 3.75 inches in thickness). This is good for most sheet-type materials.

The long-z option, used mainly for large 3D carvings, requires a custom frame and allows for up to 36" of travel.

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What is the z-axis travel for your largest machine?

The CO2 laser tubes that we sell have an output light wavelength of 10500 nm (nanometer). Our goggles provide protection for this wavelength of light.

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What is the wavelength coming from your laser tubes?

The strip brush is .2 inches (5.23 mm) wide, so a slot of that width or slightly wider will work. We use a .25 inch groove and use glue to adhere the strip brushes in our dust shoe.

The material of the bristles and the strip that holds the bristles are nylon.

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What is the width of your strip brushes?

Our anti backlash nut is optimized to give your the least amount of backlash with our ACME thread, so having loosen might give you more backlash and a offset. But there is no current way to loosen up the backlash nut.

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The acme thread and anti lash nut are pretty tight. Can I loosen this combo up a little?

The inner depth of the 1/2" to 1/2" rigid coupling, would be 1.4205in or 36.08mm.

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What is the inner depth of the 1/2" to 1/2" rigid coupling?

Yes, you can use any two of the output terminals of the breakout board to control the SuperPID closed loop router controller (a diagram is not needed with these instructions).

One output terminal will be used as an on/off (1/0 or 5v/gnd) that will be invoked with the M3/M4/M5 M-codes in your g-code instructions.

The other terminal will be connected to either another 5v/gnd signal to control speed for 5000/20000 rpm or for PWM output (recommended) for proportional speed control.

To setup this configuration in Mach3, go to your ports and pins dialog box (config menu -> ports and pins). Click on the spindle setup tab. In the Motor Control Section of the dialog, check the box for Use Spindle Motor Output and check the box for PWM control. Change the PWM Base Frequency to 50Hz.

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What output pins on your BOB are used to control the SuperPID?

For a custom quote on an assembled blacktooth, please contact sales@buildyourcnc.com

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What is the price for your laser kit, to be shipped assembled

The units of measurement that we use is Imperial, (inches, feet, etc.) but Metric units can be used with our machines as well (millimeters, centimeter, etc.).

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Hello thank you for the wonderful your efforts.may i ask? What is the unit of measurement used?