CO2 laser will not cut wood material fast at all. This is just the nature of the laser energy. The wood is a very low absorbent of the laser energy and you will need to run probably around 10 ipm to cut through the wood. CNC is much more efficient for cutting and laser as more efficient at marking or slowly cutting if you need the small kerf. You will also need a relatively high output air source to cut efficiently. The air will blow away the char (carbon) on the wood. The black char will absorb most of the laser energy not allowing the wood to be cut well. We use a compressor for the air source, but you can use a commercial hydroponic air pump instead.

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How fast can I cut 1/4" wood with the 40 watt CO2 laser?

Which machine are you referring to?

Additional Information:
they are the x axis drive extensions

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z axis 1/4" drill rod, wheres it go?

If you are using a silicone tube with a 1/4” ID, it will fit the nipple of the 1.5kW spindle water connections measuring an OD of 0.31”. The silicone will stretch and you will need to use water or saliva to help the tube fit.

The tube ID being smaller than the nipple will help the seal prevent water from leaking.

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1.5KW water hose 1/4" ID - 3/8" OD does not fit in spindle fitting with ID 0.31"

I like to use a 3/8" drill bit to create the holes on a table to mount the rails to give the rails a bit of wiggle room to adjust the alignment of the rail.

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Attaching the aluminum rails to the table. Do you use a 1/4" or 5/16" drill bit?

Setting the microstepping on a driver is really a function of how much resolution you want on that axis and less related to the CAM software that you use.

Here is the formula for steps / inch:

In this example, I will use a lead screw that has 1/2" linear travel per motor rotation.
Microsteps will equal the denominator. So, 1/4 would be 4. That is how many steps per a full step.
At full step, the steps for one revolution for our motors is 200, therefore

steps / inch = (motor steps) / (how many inches of travel for one motor revolution)
steps / inch = (200 * microsteps) / .5"
steps / inch = (200 * 4) / .5" = 800 / .5" = 1600 steps/inch

If you were using a timing belt, roller chain or rack and pinion, use the pitch circumference to determine the number of inches of travel for one motor revolution. If the number of teeth is 9 and the pitch is 1/4", then the pitch circumference is 2.25". Just plug that into the formula and you will get your steps/inch. You will notice a lowering of the resolution so you may want to increase the microstepping to get finer resolution.

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Using VectricPhotoCarve and wondering what should my micro-stepping be. Presently using 1/4"

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?

The belt is definitely urethane. You are correct that natural urethane has a yellow to beige appearance; however, urethane can can be tinted to exhibit many colors.

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.08" Pitch Timing Belt 1/4" wide (per inch) says that it is urethane, but the timing belt in the picture is black, which is usually neoprene. Is this belt urethane or neoprene?