Milo V1.5 BTT Scylla Motherboard Upgrade

[PFarm]

3 hours ago, real1st said:

What is your endstop setup like?  where does your machine home?

Z homes to the top, X to the left, Y at the front. Are you having issues with it homing in the wrong direction?

Edited June 13, 2025 by PFarm

[PFarm]

@Jerazmus "So awesome!! I can’t wait to get there with mine. Still haven’t really sat down to build yet. I just got the Scylla board in. Is there anything I need to know with hooking that board up that isn’t obvious? "

Are you using a power supply for the MCU and another for the steppers? If so, I'd recommend a contractor used as a safety device. When wired like the Milo V2 wiring, when the estop is used, the contactor prevents the VFD and steppers from powering up. Only when the operator sends the M80 command will the contactor power up the VFD and steppers.

MiloV2-Wiring-03.02.25.pdf

 

 

[Jerazmus]

@PFarm it’s probably a good idea to use 2 separate power supplies. I did not even know about the contactor as an option. I will look into that for sure. I’m thinking 48v for the steppers but I watched one of the Milo guys using a 55v psu. I don’t think I need that. I’m still learning after all and I’m not going to mill steel which isn’t recommended anyways. I also need to get some end mills as the kit only comes with some starter bits. I saw your post of your mills. Maybe I will make an order similar to yours for some variety. 

[PFarm]

4 hours ago, Jerazmus said:

@PFarm it’s probably a good idea to use 2 separate power supplies. I did not even know about the contactor as an option. I will look into that for sure. I’m thinking 48v for the steppers but I watched one of the Milo guys using a 55v psu. I don’t think I need that. I’m still learning after all and I’m not going to mill steel which isn’t recommended anyways. I also need to get some end mills as the kit only comes with some starter bits. I saw your post of your mills. Maybe I will make an order similar to yours for some variety. 

You're correct, all you need is a 48V PSU for the steppers. We Haus a German member in Discord who is milling steel and stainless steel. He is pushing his Milo to see what he can do with it. It's all about feed and speed to make it work with other materials. HSMA Advisor is an excellent app to help figure out feed and speed for different end mills, operations and materials. As posted, the Dreamique has good end mills, I use single flute and three flutes ones.

 

[NewGradRN]

Do you still have 12V connected to V-Mos? 

[PFarm]

No 24V is connected to V-MOS. There are internal 5V and 12V rails that you can select with jumpers.

 

From the manual: Both the tool setter and the optoisolator have their operating voltages defined

by the state of the Vtool jumper, as shown in the image below. Do not use the

VMOS setting if the voltage supplied to VMOS is greater than 24V as this may

cause damage to the controller.

 

[PFarm]

Newest update to the Syclla controller

With the help of .djroomba on Discord was able to implement controlling the Spindle with RS485 Modbus for the Huanyang VFD.

• Download the latest ArborCtl zip file from here and follow the instructions.
• In the machine-specific directory, upload the zip file (do not extract the zip file), and follow the onscreen instructions
• You will now have an ArborCTL directory in the plug-ins
• You can enter the parameter directly on this page or use the ArborCTL wizard.
• Click " Save " and "Run" VFD config macro

• You need to program the VFD parameters for RS-485 communications

 

• Check that the other parameters as well

• Wire the Scylla RS485 A to RS + on the VFD and RS485 B to RS- on the VFD.

Great thing about this mod is you'll now get an accurate RPM readout on the VFD display and the RRF GUI.