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?

Ray32704

[AndyUK]

Hi m_c.

Will this work?

Ray32704

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

[AndyUK]

Yeah, you're right I didn't read it correctly. Ignore my comments about the SSR.

This is my circuit diagram:

https://www.mycncuk.com/attachment.php?attachmentid=32092&d=1704021402

Makerbase MKS DLC32 MAX CNC Router Board:
https://a.aliexpress.com/_EusgSEY

You wouldn't even need to write any code to get this working.

[The Gresley Luthier]

Hi AndyUK.

Wow, just looking at your schematic, that must be one big machine, the schematic is way above my skill set unfortunately, I will try to gat my head around it, but don't forget i am a novice.

I understand machines, I am a time served Tool & Die maker, but that was 55 years ago now. I am probably, on a scale of 1 - 10 a 5 when it comes to electrics/electronics.

Regards.

Ray

[The Gresley Luthier]

Hi again AndyUK.

I have spent all afternoon going through your recommendations and schematic. I must admit, I like the idea of a standalone controller, it means I will not need to use my laptop directly. There appears a lot of equipment on your schematic, I will not be needing. If you can remember my first topic I need the controller, 3 NEMA 23 Stepper motors & 3 Stepper drivers, PSU + E Stop, my router is 240 vac.

Will my chosen Motors and Drivers work on this controller, my gut say's yes, but my brains not so sure.

[EddyCurrent]

Ray,

Taking into consideration all of your responses to all of the threads you have posted, my conclusion is this;

You want to make guitars so just buy a cnc machine that is already built, be it new or second hand,.
It's going to be easier, faster, maybe even cheaper,I know this because of my own cnc journey,

Thanks to this forum I came to understand the fundamentals of cnc machine design and then thanks to my existing electrical and mechanical knowledge the build was quite easy.
It did take me a while though so think how many guitars you could be making rather than fighting with putting a cnc machine together.

Off the top of my head here's a list of items that have to be considered, then you also need the tools and equipment in order to fashion them.

aluminium for frame
fasteners
Linear bearings
linear rails
ball screws
ball nuts
ball screw support bearings
timing belts
timing pulleys

stepper motors
drivers for stepper motors
spindle motor
control board(s)
relays/contactors
panel wiring
flexible cable for steppers, spindle, switches
energy chain
wiring terminals
enclosure for electrical equipment
trunking for wiring
din rail
VFD for spindle(possibly optional)
Power supplies
switches, buttons, indicator lights
limit switches
homing switches
fuse holders

[The Gresley Luthier]

Hi EddyCurrent.

Thank you for your input.
Building and repairing guitars, is to me an hobby. I also play Both Electric and Bass guitars. I do it because I like it, and at my age (77 y.o.) starting to suffer with Arthritic in my hands, it became obvious to me that if I wanted to carry Building guitars (repairing guitars does not need has much handwork as building from scratch) I would have to have a machine to help me or find another hobby.

At 77 it is a bit old to start a fresh, so after a long period of thought, I decide on a CNC machine, as I have previously stated I built a small Milling machine and converted that to CNC control (Mach3) some 20 years ago, I thought, what could be more difficult? I know now I was wrong. The world of CNC as moved on quiet a bit since those days.

I do not want to give up my hobby, so I started looking for used machines, you can find more "Rockinghorse Shit" than you can find used CNC routers, as for new ones, it became obvious to me earlier on on this journey, that I, as a pensioner, could not afford to by a machine that would suit my needs (I have seen many, or most over £1000.00) so I thought, surely I have the skills to build my own. As previously stated, I am a Time Served Tool Maker, with a fair knowledge of electrics, but needs an helping hand with the said Electrics/Electronics, at least if I built my own, with the help of Like minded people such as yourself, I could do this more cheaper, and get satisfaction knowing that I built it.

Your help is much appreciated.

Regards.

Ray