I have just started purchasing, collecting, and printing the parts to build the R3. I have a couple of generic questions:
1.• Is there a general wiring diagram? I have ordered the electronics, motors, and power supplies outlined BOM
2. is the device with the digital display in the picture the power supply for the spindle and is that how the spindle speed controlled.
Are you planning on using the RAMPS board with the Arduino with the Marlin firmware in my Github?
https://www.instagram.com/p/CJrjhwdremY/?utm_source=ig_web_copy_link
The large grey box is the Spindle controller/Speed controller/ Spindle PSU which is called the VFD drive. This sets the spindle speed.
Whilst I’ve only manually commanded the VDF drive with the Arduino RAMPs board with Marlin but I believe is can be setup to work with discrete (Modbus is perferred but is not supported on Marlin)
Please look at this link -
https://marlinfw.org/docs/configuration/laser_spindle.html
Thank you for your response, Yes I will be using the RAMPS and Arduino. I am very comfortable with Marlin I use it for all of my 3D printers and I love it. Can’t wait to get started on the build still printing parts. 
You know your way around it then!
Here is the motor configuration:
Spindle wise - I’ve not hooked a VFD to marlin with discrete connections, so maybe someone else could weigh in?
I am getting ready to purchase the spindle kit anyone have any opinions on this:
I’ve only used the 1.5KW variant and love it! I can only imagine the 2.2KW water cooled will be pefect for the those lower spindle speeds. like cutting aluminium.
PS these don’t get hot! well I have V20 VFD driver.
So I am very close to collecting and printing everything. I have been 3d printing for a few years so having a small farm helps cut down on print time. I have however run into one small snag. the BOM calls for M5 x70mm Bolt with a Washer head for the NEMA23 motors. This length is not correct, the total length of the spacer and motor equals 70mm and you still need to get through the wooden frame. I think 80mm will make it with nothing to spare. fortunately, there is https://www.fastenal.com and I have a local branch that I can visit in a pinch. Here are some photos of my progress:
https://photos.app.goo.gl/s4Vu2rseh9dBYqQy6
You logic seem sound - let me check the model.
In the model I have:
Motor flange = 5mm
Space = 50mm
Side Panel = 18mm
Nut plus washer = ~5mm
Total length = 78mm
80mm seem like a more applicable option then! I do apologies
Hi Ronin,
I also have same doubt about spindle. I’m concerned the 2.2 kW spindle weight could endanger machine performance. Could you please share your impression with this spindle operation?
Thank you in advance!
Absolutely, once I get to that point. I can tell you that I am able to turn the lead screw by hand and it moves smoothly. You can see my build so far here: https://www.facebook.com/photo?fbid=1842440165915036&set=g.1023078667749894. Still waiting on my gears and belts, they are coming from China literally.
The 80MM worked perfectly. https://www.facebook.com/photo?fbid=1842440165915036&set=g.1023078667749894
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have you got some photos to show off what you’ve done with it?