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### Question #: 13700

Question: What is each axis' resolution for the blueChick in mm or µm?

Current Solution

The resolution for any of our machines is based on the driver microsetting setting and the machanical parts used for each axis.

For example:
The blueChick uses 9 tooth drive sprockets for the x and y axes.
To determine resolution use this formula:
Resolution = steps / inch or the travel in steps for one revolution of the drive sprocket
Steps = (motor steps) * (driver microsteps) or natural motor steps * microstepping setting on the driver
Inches = t(ooth coun)t *( tooth pitch) or the number of teeth for the drive sprocket

Resolution = ((motor steps) * (microsteps)) / (teeth * pitch)
In this example, the microsteps is 16 and the pitch is .25 inches
= (200 * 16) / (9 * .25")
= 3200 / 2.25"
= 1422.222 steps per inch

For the z axis of the blueChick, the resolution is typically based on 4 micro steps and the travel for one turn of the motor is 1/2". Therefore:
Resolution = (200 * 4) / .5"
= 800 / .5"
= 1600 steps per inch

Respond:

### Other Possible Solutions to this Question

• WHAT IS THE FORMULA TO DETERMINE STEPS PER INCH OR RESOLUTION FOR EACH AXIS?

The formula and calculation is a starting point to get into the area of steps per inch. You will then need to use the mach3 calibration utility to get the exact steps per inch.

Formula:
step per inch = (motor steps * microstepping) / (travel at one turn of the motor in inches)
if microstepping is set at 16 (1/16 on the driver) then and you are using a sprocket and chain with a pitch of .25 inches and 12 teeth on the drive sprocket
= (200 * 16) / (12 * .25)
= 3200 / 3
= 1066.666 steps per inch

For lead screw that has a travel of .5 inches at one turn like the 5 start 1/2 inch lead screw and using 4 microsteps per step (1/4):
= (200 * 4) / (.5)
= 800 / .5
= 1600 steps per inch

Remember to use the mach3 calibration wizard and double check the driver microstep setting.

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WHAT IS THE FORMULA TO DETERMINE STEPS PER INCH OR RESOLUTION FOR EACH AXIS?

• If I wanted to use the blueChick for isolation routing, what accuracy could I expect from v3.0 and v4.2?

The blueChick v4.2, is accurate at 1000's of an inch, with the roller chain, the v3.0 with the timing belt will increase the accuracy by 5%-10%, but to the expense of structural integrity.

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If I wanted to use the blueChick for isolation routing, what accuracy could I expect from v3.0 and v4.2?

• What do I do if I didnt recieve the y-axis rails, z-axis rails, or the roller chain for my bluechick (rollerchain)?

Please contact us at customerservice@buildyourcnc.com so we can get the customer order # and customer info so we can send the replacements right away!!

• What are the specs for the stepper motors on the Bluechick? How much for shipping to Toronto, ON, Canada? Is there duty for shipping to Canada?

Here is the answer to your first questions regarding the blueChick motors:
https://buildyourcnc.com/FAQ/9024

The shipping of the blueChick CNC will depend on if the machine is assembled or not. There is a duty for international orders, but I am unsure of the cost in other countries other than the US.

Thanks

• Received the bluechick today. Inventory shows I am missing 1/4" bearing #339 and 4 each 1/4" set screws #360-10536. What do I do to get them replaced? Thanks. Lml

You need to either call us or email us, and provide the name you used when you ordered, so that we can find your order, as well as what parts you are missing.

• What is processing and ship time for a bluechick? Tried to call but no answer and no space to leave a message.

We try to have the product out for shipping within 48 hours. The shipping time can vary depending on the shipping option you choose, and the delays the shipper may have. Unfortunately we have no control over the product once the shipper has it.

• What is the dot resolution (size) of the BlackTooth laser?

The dot resolution of the blackTooth is a combination of two specifications of the machine:

- The steps/inch (or steps/mm) which is the resolution but not the dot size
- The size of the actual dot, which is not specifically related to the resolution.

The steps per or resolution can actually be a range, since the driver microstepping can be modified.

A simple formula can be used to determine the resolution:

step per inch = (motor steps * microstepping) / (travel at one turn of the motor in inches)

if microstepping is set at 16 (1/16 on the driver) and you are using a pulley that has a pitch of .08 inches and 20 teeth on the drive sprocket

= (200 steps * 16 microsteps) / (20 teeth * .08 inches)
= 3200 steps / 1.6 inches
= 2000 steps per inch

To increase the resolution, just increase the microsteps on the driver.

The actual dot size will depend on the lens you are using, the material being lased, the time period that the laser energy is applied to the material, and the focal height of the lens to the work surface material. The energy from the laser will converge to a point and create a dot on the surface (which is different than the kerf of the laser cut into the material).

The dot will appear in different sizes depending on the material because, say wood, will burn causing a dot that burns the fibers of the wood and spreads a bit. The dot lased on the surface of a plastic, say Plexiglas, the dot will be smaller because the energy is absorbed only at that point, but since Plexiglas is a thermoplastic, a bit of the energy will melt the dot edges depending on the time frame (period) that the energy is applied to the surface.

The focus of the laser energy from the lens looks like a cone converging to a point, then diverges outward after that point. Depending on the distance from the lens to the surface of the material, the dot will be bigger or smaller. You want to find focal point (where the energy is focused into a point). You can use the technique where you lay a material on a slope and lase that material along the slope to find the sweet spot (dot) and that will be your smallest dot, or kerf location. Remember that the kerf will widen or narrow within the material thickness depending on the focal length lens specification (the cone will be shorter or longer depending on the lens focal length).

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What is the dot resolution (size) of the BlackTooth laser?

• What are the specs of the stepper motors on the BlueChick

The blueChick uses NEMA 23 425 oz/in motors.

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What are the specs of the stepper motors on the BlueChick

• WHAT LENGTH OF MOTOR CABLE SHOULD BE USED WTIH THE BLUECHICK V4.2

The recommended total length of motor cable should be 15 feet for the blueChick v4.2

Z - 6 feet
Y - 5 feet
X- 4 feet

20 AWG 4 conductor

If your drivers will be positioned farther from the machine, you may need longer cable.

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WHAT LENGTH OF MOTOR CABLE SHOULD BE USED WTIH THE BLUECHICK V4.2

• What is the load rating for the Linear Ball Bearing Block 20mm (0.78")?

The dynamic load ratings for our 20mm linear round rail blocks are 880 kgf . The static load rating is 1370 kgf.

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What is the load rating for the Linear Ball Bearing Block 20mm (0.78")?

• What size stepper motors does the blueChick use?

The blueChick uses NEMA 23 425 oz/in motors.

Click the link to respond:
What size stepper motors does the blueChick use?

• in one of your posts you mentioned working on ethernet connection for boards. any estimate on resolution of that?

USB Mach3 boards will be available on the website now. Ethernet is still something for the near future.

• HOW MUCH MOTOR CABLE SHOULD PURCHASE FOR THE BLUECHICK

The recommended total length of motor cable should be 15 feet for the blueChick v4.2

Z - 6 feet
Y - 5 feet
X- 4 feet

20 AWG 4 conductor

If your drivers will be positioned farther from the machine, you may need longer cable.

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HOW MUCH MOTOR CABLE SHOULD PURCHASE FOR THE BLUECHICK

• What's the maximum speed at I can machining reliefs without lost steps with BlueChick?

This will depend on the material, end mill that you are using, and whether you are using a spindle or a router. The stepping motors and the mechanics on the blueChick (and the other machines as well) can move the machine very fast (x and y about 700 ipm rapids).

You will need to refer to the manufacturer specifications for the speed on the end mill with the particular material. The Onsrud end mills sold here are of top quality and can generally go faster than standard end mills. If the reliefs are in wood, you will be able to machine around 200 to 80 ipm depending on the wood and the depth per pass. Generally, you want to rough out most of the wood with a roughing end mill then finish off with a finishing end mill with a small tip and a small step over.

If you are using a router, the speeds will be slower than a spindle since the spindle can handle more torque and the torque is compensated with the VFD (Variable Frequency Drive).

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What's the maximum speed at I can machining reliefs without lost steps with BlueChick?

• What brand is the 2.2 kW spindle? Same for the VFD. Thanks.

Spindles are generally covered up to 1 year after date of purchase. We do not repair them in house, but we do work with our manufacturer to replace defective units. Generally if you have a defective unit covered under warranty, we will issue a replacement.

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What brand is the 2.2 kW spindle? Same for the VFD. Thanks.

• what is the horse power rating for the 2.2 kw spindle motor

I don't know the exact temperature, but the spindle actually needs to get to a relatively high temperature for normal operation and to protect the bearings. IF I find better information from our supplier, I will add this information to this answer.

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what is the horse power rating for the 2.2 kw spindle motor

• what is the horse power rating for the 2.2 kw spindle motor

2.2 kW spindles have 2.95 HP.

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what is the horse power rating for the 2.2 kw spindle motor

• what is the outside diameter of each opening on the metallic T connect for the Vacuum System Cups and Nozzle for pick and place?

The outside diameter on the T-Connector is 1/4" (.25 inch)

• WHAT IS SHIPPING DIMENSIONS AND WEIGHT FOR THE VERTICAL LASER.

Shipping crate size 121" X 36" X 92"

Weight 511 LBS

Click the link to respond:
WHAT IS SHIPPING DIMENSIONS AND WEIGHT FOR THE VERTICAL LASER.

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