Help needed proofing newbie control schematic.

[The Gresley Luthier]

Hi All.

Is there a forum member willing to proof and amend where necessary, my control schematic for my self built CNC wood router?

Regards.

Ray

[m_c]

Just post up what you have, and we'll advise/recommend

[The Gresley Luthier]

Hi.

This schematic was made in MD PowerPoint then converted to PDF, I hope it is ok, i do not have a drawing package.

Regards

Ray

[The Gresley Luthier]

Here's another.

[m_c]

Quick look over.
Pg1/2
What spindle are you using? This will change what advise would be best.
Earth shouldn't go through the isolator (probably just the way things have been drawn, but earths should never be switched)
You'd need quite a beefy E-stop to handle switching mains voltage directly at the currents involved

Pg3
Those fuses/Circuit breakers should not be there. There should be no switching/fuses of any kind between the stepper drivers and the motors

Pg4
All good.
(note - Power to the steppers should come individually from the power supply as per the diagram, and not daisy chained along the drivers)

Pg5
You'll need to make sure that arduino outputs are capable of power the drivers inputs.
Other than current limitation of the Arduino outputs, there is no need to have all the enables on separate outputs.
Note - I'd have to check the DM manual, but the drivers may default to enabled anyway i.e. be enabled without any power applied to the enable input, and disabled when power is applied to the enables.

[The Gresley Luthier]

Hi, Thanks for taking the time to view my circuit.

I have a choice of routers, one is 240 vac 710 Watt, the other is 240 vac 1200 Watt, not yet sure which to go with.

Regards and Thank You.

Ray.

[The Gresley Luthier]

Hi m_c.

I have removed the Trips from Page 3. I ham now struggling as to where I place the E Stop in the circuit, do I need to cut the power supply to the stepper drivers, the stepper motors and the UNO??

Regards.

Ray

[The Gresley Luthier]

Hi m_c.

Will this work?

RayCNC electrics Master - Copy.pdf

[AndyUK]

Hi m_c.

Will this work?

RayCNC electrics Master - Copy.pdf

Looks like you've removed the fuse from the spindle AC input, and there is no separate fuse to the 24V PSU?

This means that the fuse in your mains plug is now covering both devices... Which means they wouldn't trip as fast as they should. Imagine if your PSU had a fault, instead of a ~4A fuse it now has a 13A fuse...

Order should be: Mains -> Plug -> Fuse in Plug -> On Off Switch -> EStop (I have my reservations about this but you seem to want to do it without a safety relay...) -> Mains Distribution -> Individual Device Fuses -> Individual Devices.

Why are you using an Arduino UNO rather than a dedicated CNC controller? If it's a cost thing, I bought a MKS DLC32 from AliExpress then other day for £15 delivered.... It runs FluidNC beautifully, and I can guarantee it'll outperform that Uno. It has dedicated motor drive outputs for 4 or 5 axis, a spindle control circuit, an Estop circuit, probe and limit switch pinouts... Oh and onboard Bluetooth and WiFi, with a web server for on the fly config and control. The 3D printer revolution has made lots of cheaper end items available.

[The Gresley Luthier]

Thanks Andy.

I think I understand what you are saying,

I am open to use any control system that is recommended to me, the reason I initially chose Arduino is that I am familiar with Arduino IDE writing, also I have several Arduino Uno's in my collection of spares, I can afford another £20.00 if it's worthwhile.

Did you read my schematic right, the drawing shows the SSR input as vdc, the output shows vac.

You seem to know what I am trying to achieve, as stated earlier, I am a Mechanic not an Electrician, can you guide me by supplying a schematic??

Regards.

Ray