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### Question #: 1022

Question: What is the Greenbull average power consumption in conjunction with 2.2KW spindle?

Current Solution

You can determine you overall CNC machine current consumption be adding your spindle power plus your CNC motion power and the power that your computer requires.

the formula to understand the current of each component is watts = volts x current, or W = V * I, or with some algebra, Current (I) = Watts (W) / Volts (V)

For example:

Spindle:
The 2.2 kW = 2200 watts and you can find the current by taking the input voltage of 220 volt and get the current using the above formula: 2200 W / 220 V = 10 A (Amps)

CNC motion electronics:
The power supply that comes with our machines is generally 8.8 A

Computer:
The computer that you use to control the CNC machine will have a specific wattage. Let's say the watts is 500: 500 W / 110 V = 4.5 A

Add them up: 10 A + 8.8 A + 4.5 A = 23.3 Amps

Respond:

### Other Possible Solutions to this Question

• What are the dimension of the greenBull 4x with dual laser/spindle head?

The shipping weight (with crate) of the greenBull 4X CNC machine with the dual laser/spindle head is 230 lbs. The overall dimensions are: 76"x36"x27". The crate is typicall send via freight.

What are the dimension of the greenBull 4x with dual laser/spindle head?

• The spindle drops on our greenBull when power is turned off. How do we stop this?

When you say the spindle drops, are you referring to the z-axis assembly that contains the spindle? If so, did you replace the lead screw and anti-backlash nut with a ball screw? Ball screws have extremely little friction and will cause an assembly under gravity to move down. If not, your lead screw and anti-backlash nut friction is extremely small, which is surprising and I have never seen this before. I would be interested in seeing a picture of the assembly. Please send a picture to techsupport@buildyourcnc.com so I can investigate this issue further.

We haven't replaced or disassembled anything on the z-axis. I will try to get some photos sent to you. Are there any adjustments or recommendations for PM of the z-axis assembly?

Can you tell me what PM means?

The spindle drops on our greenBull when power is turned off. How do we stop this?

• What 1/2" collet and nut do I use for the Greenbull with the 2KW spindle? I want to order the Onsrud Spoilboard surfacing cutter.

For the 2.2kW Spindle you would need the ER20 1/2" Collet.

• What is the shipping weight of the greenBull 4x assembled with dual laser head?

The shipping weight (with crate) of the greenBull 4X CNC machine with the dual laser/spindle head is 230 lbs. The overall dimensions are: 76"x36"x27". The crate is typicall send via freight.

What is the shipping weight of the greenBull 4x assembled with dual laser head?

• BUILDING ONE OF YOUR GREENBULL 6X LONG AND 2.2 KILOWATT SPINDLE DOES NOT FIT. SEEMS LEAD SCREW YOU SENT WITH KIT IS SHORT 42" LOOKS LIKE IT NEEDS TO BE 5 OR 6 INCH LONGER. THIS CORRECT? WHAT THE NEEDED LENGTH FOR UNIT?

The leadscrew length for the greenBull long Z-axis is 47 inches.

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

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.

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.

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

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

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

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

• What collet size comes with the 2.2kw spindle?

All of our spindles come standard with a 1/4" collet. The 2.2kw, and 4.0kw, can be upgraded to a 1/2" collet with a separate purchase.

What collet size comes with the 2.2kw spindle?

• What all is included in the GreenLean kit (sold with RedSprout and spindle/inverter)?

The greenLean with the redSprout and the spindle option has everything you need excluding the spoilboard and the end mill.

What all is included in the GreenLean kit (sold with RedSprout and spindle/inverter)?

• What is the complete list of items (BOM) w/o electronics that ship with the greenbull cnc?

A generalized list of what comes with the machine is on the product description page. A full packing list will come with the order, so that you can check for missing parts. We can not provide a full, detailed, list of parts without an order. If you have ordered from us, and your packing list is missing, you can contact us by email, providing us with the name you ordered under, and we will send a copy to you through email.

What is the complete list of items (BOM) w/o electronics that ship with the greenbull cnc?

• Building one of your greenBull 6X Long and 2.2 kilowatt spindle does not fit. Seems lead screw you sent with kit is short 42" looks like it needs to be 5 or 6 inch longer. Is this correct? What is the needed length of lead screw for this unit?

The leadscrew length for the greenBull long Z-axis is 47 inches.

• I would like to know what the lowest rpm that can be acheived with the 2.2kw spindle and inverter and still have enough torque to drill

According to the supplier of the 2.2 kW spindle, the safest operating speed for the spindle is 6000 RPM. The supplier also stated that theoretically, the spindle can operate from 0 to 24,000 RPM. I am continuing a dialog with the supplier to delve deeper into understanding the configurations and ramifications of such configurations for operations outside of the safe boundaries into the "theoretical" ranges.

20

• What are the noise levels of the 1.5 Kw and 2.2Kw spindles?

The noise level of the 1.5 kW and the 2.2 kW are very similar. The noise level is considerably quieter than typical routers. I am going to add sound db levels to this FAQ a bit later.

The db (decibels) reading for the spindle is 70 and an 890 Porter Cable router (a lower powered tool than the spindle) measured 90 db. Both measurements were taken in the same environment and measured at the same distance from the tool.

Practically silent. The inverter makes more noise!

Practically silent. The inverter makes more noise!

What are the noise levels of the 1.5 Kw and 2.2Kw spindles?

• What is the rpm range of the 2.2kw spindle and inverter?

The VFD is capable of a maximum of 400 Hz frequency. That converts to 24,000 RPM for the spindle. The minimum frequency is 100 Hz which is 6000 RPM.

What is the rpm range of the 2.2kw spindle and inverter?

• Could I safely use a 2200w 220 to 110 converter and uninteruptable power supply with my 2.2kw inverter and spindle?

Yes, you can use a 220 to 110 step down transformer to provide power to your 2.2kw VFD and spindle.

• Hello what is the thread size of the water cooling fittings on the 2.2kw spindle? I am wondering if I can replace the fittings with standard pc liquid cooling fittings, which are G1/4".

They do have a similar looking thread as the G1/4”, but I will confirm in the morning. We use the G1/4” on the pump and radiator so it will be easy to determine this fit when I get into the office.

Another FAQ says it is an M8, but I will confirm.

These are M8x1 thread. I was able to find M8x1 3/8 barb fittings on Ebay. I plan to drill and tap my spindle to G1/4 though.

• Is the 4kv spindle constructed using two or four bearings and what size collets are included with the spindle/vfd combo?

Yes, all of the spindles come with collets. The collets have a 1/4" (6.35mm) bore for end mills that have a 1/4" shank. The ER specification is different for the 1.5kW (ER-11) and the 2.2kW (ER-20).

• what is the warranty period and do you repair these in house? 2.2 kW (kilowatt) Water Cooled Spindle with Inverter (VFD)

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.

• What is the warranty on your 2.2KW spindle

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