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### Question #: 14621

Question: heavy duty 4x8 od z tower height /thanks

Current Solution

The Z axis travel on the heavy duty 4x8 greenBull CNC machine is 8 inches.

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### Other Possible Solutions to this Question

• Can I buy an asembled gauntry for the 4x8 table heavy duty only and pick up?

Actual table dimension: 4'x8' is 56.078"x 121.50" (the overhang in the illustrations should be 3/4" thick)
To determine the frame dimensions, first consider using the frame height shown of almost 3' (2.86'). The width of the frame should be 4" narrower than the dimension from rail edge to rail edge (6X rail to rail is 80.078"). This will provide a 2" overhang on both sides (4X frame width should be 56.078").
The length of the frame should be 4" shorter than the desired length of the rails to provide a 2" overhang on both ends. The travel length will be 20" shorter than the rail length due to the space occupied by the gantry sides.
Two long pieces of 3/4" material will need to be placed on top of the frame with the 2" overhang on the sides and the end. These long strips of material will receive the rails and the chain mounts on the ends.

https://www.buildyourcnc.com/Item/cnc-machine-greenBull-v4-4X

Can I buy an asembled gauntry for the 4x8 table heavy duty only and pick up?

• What is the height/cutting of the z axis on the green lean 4x8

At the highest z position, the measurement from the collet of the spindle is 6-1/4" (158.75 mm) from the spoilboard. The spoilboard is 3/4" measured from the rib that is rests on.

What is the height/cutting of the z axis on the green lean 4x8

• what are the table dimensions for 4' by 8' heavy duty greenbull?

Actual table dimension: 4'x8' is 56.078"x 121.50" (the overhang in the illustrations should be 3/4" thick)
To determine the frame dimensions, first consider using the frame height shown of almost 3' (2.86'). The width of the frame should be 4" narrower than the dimension from rail edge to rail edge (6X rail to rail is 80.078"). This will provide a 2" overhang on both sides (4X frame width should be 56.078").
The length of the frame should be 4" shorter than the desired length of the rails to provide a 2" overhang on both ends. The travel length will be 20" shorter than the rail length due to the space occupied by the gantry sides.
Two long pieces of 3/4" material will need to be placed on top of the frame with the 2" overhang on the sides and the end. These long strips of material will receive the rails and the chain mounts on the ends.

https://www.buildyourcnc.com/Item/cnc-machine-greenBull-v4-4X

what are the table dimensions for 4' by 8' heavy duty greenbull?

• do you sale the G-codes for 4x8 cnc router

The blackToe machine is offered as a kit only. We do have a machine that is build form plans. The plans refer to the scratch build machine: http://www.buildyourcnc.com/cnckitintro.aspx and the one in the book "Build Your Own CNC Machine": http://www.buildyourcnc.com/Book.aspx

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do you sale the G-codes for 4x8 cnc router

• What is the width and height of the round Linear Guide Rail 20mm? Specs are not listed on the product page.

I just updated the Linear 20 mm Round Rail product page to reflect these measurements. https://www.buildyourcnc.com/item/mechanical-rails-linear-guide-rails-20mm

For your convenience, here they are:

Overall Height of Rail and Base: 37 mm (1.46 in)

Width of Base: 45 mm (1.77 in)

Mounting Holes on Center Widthwise: 30.226 mm (1.19 in)

Mounting Holes on Center Lengthwise: 150 mm (5.9 in)

If you need further information, please don't hesitate to ask be responding to this FAQ. Thanks.

• what are the shaft sizes on the motors in the heavy gantry electronics kit?

The heavy gantry kit features 1 NEMA 34 651oz-in 1/2" Dual Shaft motor and 2 NEMA 24 425oz-in 1/4" Dual Shaft motors.

what are the shaft sizes on the motors in the heavy gantry electronics kit?

• 3 axis heavy gantry combo. Is the Nema 34 motor dual shaft?

The 651 oz/in NEMA 34 stepper motor does have a dual shaft. The shaft extends 19 mm at both ends.

3 axis heavy gantry combo. Is the Nema 34 motor dual shaft?

• WHAT ARE THE HEALTH RISKS OF LIVING NEAR A CELL PHONE TOWER?

There is very little radiofrequency (RF) energy exposure to people inside a building from a cellular base station located on its roof. There are several reasons for this. First, the transmitters operate at low power levels. Second, the antennas are normally mounted near the edges of the roof and are aimed away from the building. Third, most cellular transmitters use "high gain" or panel antennas. Such antennas transmit most of their energy in a narrow beam (in the vertical direction) from their front surfaces, away from the building. They radiate very little energy downwards towards the roof or backwards from their rear surfaces. Finally, building materials absorb a significant fraction of the RF energy passing through them. As a result, the RF signal levels at any location inside the building are invariably low and far below safety limits. The situation might be different in some locations on the roof itself. RF signal levels close to (within a few feet) and directly in front of cellular base station antennas can easily exceed safety limits. Some precautions are needed to prevent people from walking directly in front of the antennas while they are transmitting. This applies also to paging and other systems that use rooftop antennas, some of which transmit at higher power levels than many cellular base stations. Kenneth R. Foster, Ph.D.

WHAT ARE THE HEALTH RISKS OF LIVING NEAR A CELL PHONE TOWER?

• in the 3 Axis Electronics Combo (For Heavy Gantry) the 651oz motor is a dual shaft ?

The 651 oz/in NEMA 34 stepper motor does have a dual shaft. The shaft extends 19 mm at both ends.

in the 3 Axis Electronics Combo (For Heavy Gantry) the 651oz motor is a dual shaft ?

• Will the redleaf package allow me to run a torch height controller and 2 nema 34 motors for my gantry? I would prefer to have motors on both sides of the machine with a heavy gantry

Yes, the redLeaf plug-and-play CNC electronics can include a THC (Torch Height Controller) and motors of any size. The limit of the number of motors that this package can include is 8 motors in total.

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

Which machine are you referring to?

they are the x axis drive extensions

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

• interst in a 4x8 cnc with spindle and laser combo

Thanks for the interest. What would you like to know about that CNC router and laser combo.

Thanks

interst in a 4x8 cnc with spindle and laser combo

• What is the Max thickness of wood that can be placed in the 4x8 cnc milling machine?

Tricky question. That depends on the way the table is built. If the table is built with a step down area, you can put as thick a material as you want. If the table is flat, the clearance is 6 inches. Now, the thickness depends on the size end mill you insert into the collet. If you use an end mill that has a 2 inch cutting length, then your material thickness is 4 inches without a spoilboard. If you need to mill thick material, I would suggest that you fashion the table accordingly so the table can accomodate any thickness you desire. That's one of the great aspects of the buildyourcnc machines, adaptability.

What is the Max thickness of wood that can be placed in the 4x8 cnc milling machine?

• what's needed to add a 4th axis to a Blackfoot 4x8?

You can add a head stock and tail stock on the blackFoot by designing the table in a way the head and tail stock is positioned at the correct level so the end mill will be at the correct position. The correct position will depend on the end mills that you will be using. The end mill should be centered to the center of the head stock jaw near the lowest z-axis position.

what's needed to add a 4th axis to a Blackfoot 4x8?

• what's needed to add a 4th axis to a Blackfoot 4x8?

You can add a head stock and tail stock on the blackFoot by designing the table in a way the head and tail stock is positioned at the correct level so the end mill will be at the correct position. The correct position will depend on the end mills that you will be using. The end mill should be centered to the center of the head stock jaw near the lowest z-axis position.

what's needed to add a 4th axis to a Blackfoot 4x8?

• WILL THE LASER ENGRAVER WORK ON NON-ANODIZED ALUMINUM

no, it will only work on anodized aluminum

WILL THE LASER ENGRAVER WORK ON NON-ANODIZED ALUMINUM

• what is the thickest plywood you can cut with the lazer

Our blackTooth laser cutter and engraver, will cut up too 1/4" wood, and acrylic. This will be the norm with our machine.
Trying to cut a thicker material is possible but will need certain adjustments, ex. lowering the laser nozzle/focal point as the cut is made, lower and lower till the complete cut is made. We however do not recommend doing this with our machine!

what is the thickest plywood you can cut with the lazer

• interst in a 4x8 cnc with spindle and laser combo pricing

If you are interested in just the laser and spindle z-axis assembly that can be installed on an existing greenBull 4'x8' CNC, then look here:

Check the links for pricing as prices may change.

If you are looking for the complete CNC with the laser and spindle, then check out these links (neither of these include the table):
https://buildyourcnc.com/item/cnc-machine-greenBull-v4-4X-hybrid

We have a new machine (shown at a 60 degree table angle) that will include a laser option at a later date. It is also available as a flat CNC as well.
https://buildyourcnc.com/item/cnc-machine-greenbullv2-milling-laser

interst in a 4x8 cnc with spindle and laser combo pricing

• how to conect the VFD spindle using modbus

It is possible to connect and configure the spindle VFD to the mach3 via an RS485 communication and protocol.

The first thing you will need is the dynamic link library to pair with mach3 called the Huanyang VFD Mach3 PlugIn. You can find this file at the mach3 support forum here: http://www.machsupport.com/forum/index.php/topic,14182.0.html

Follow the pdf that comes with the library file, but here is a synopsis of what you need to do (I also added a lot more information that may be useful during this process as the manual does not cover the main connections that need to be done):

You will need to program your VFD so that it knows how to communicate with mach3 and the computer (go into the programming mode of the VFD and change these parameters):
- PD001 - value 2 - Enables with communication aspect of the VFD
- PD002 - value 2 - Enables frequency control from the communcations port
- PD163 - value 1 - VFD address
- PD164 - value 1 - Baud rate of 9600 (speed of the communication)
- PD165 - value 3 - 8N1 RTU - 8 bits (that's the size of the word that gets communicated), N (No parity or no error checking) and 1 (1 stop bit)

Copy the dll file to the PlugIns folder of mach3.

Connect the RX and TX lines to your computer. There are a couple ways you can do this, but the recommended way would be to use an FTDI USB device which converts a USB to a serial com port. The device will have Rx and Tx connectors to connect to the VFD terminals with the same labels. This method is recommended since serial ports are not as common in computers these days.

Next, you will need to configure mach3 to use the plugin library. Start mach3 and click on Menu -> config ->Config Plugins. Enable the new plugin by clicking on the red cross on the left column next to the plug in. Restart mach3 after doing this.

No you need to configure mach3 to use the HuanyangVFD plugin. Go to the ports & pins configuration and select the spindle setup tab. Make sure that the Disable Spindle Relays checkbox is unchecked. We don't want mach3 to output a signal for a relay since the spindle will start up and turn off within the VFD and not from an external relay.

Next, go to the HuanyangVFD settings by clicking on Menu -> plugin control -> HuanyangVFD. Set the parameters to the same settings you put into the VFD programming. The com port will be shown as new hardward when you plug in the USB FTDI device. A little bubble will be displayed at the bottom right where it will notify you that a new device is being installed (be patient while windows assigns a com port). Alternatively, you can use the windows device manager to see which port was set for the new USB FTDI device). You may need to restart mach3 several times until you get the correct information displayed in the PD001 and PD002 fields. When the com port is correct and the other parameters, like baud and VFD address is the same as you entered in the programming, then the PD001 and PD002 will show the number 2, otherwise, a 99 will appear which means that communication was not successful.

You can now control the on/off and RPM of the spindle using the RS485 communication between mach3 and the VFD.

Will this work with the brand called "best "vfd as well.

how to conect the VFD spindle using modbus

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