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I don't quite understand why the contactor coil would burn out, as that should be totally independent of anything that the VFD is doing.

It does sound like an issue with the VFD though.
I've...

Suitable BOBs do make life far easier, especially with the micro sub-d connectors used.

The 'Ethernet' control is more likely to be EtherCAT, CAN, or ModBus.

ModBus is generally too slow for...

I think I fitted a similar drive for someone last year.
They're all a much of a muchness. I suspect there's limited actual manufacturers of the drives, and they're mostly relabelled/cloned.

...

If you want to avoid Mach, then I'd doubt that there is anything available ready to go, and something custom built by somebody else is likely to cost more than $600.

If the drive Neutral (or L1/L2) terminals are connected to the N11 terminal, then it is a neutral connector.

My guess is that whoever has wired it up previously, has bodged the wiring with 4 core,...

The issue with microstepping, is that you're essentially relying on the energised coils to balance the rotor between steps, so any external forces can affect the actual position.
The reduced noise...

I did have a list of with some UK suppliers from when I was looking at building a router, but I can't find it.
Only thing I can find, is the model I started on used a Kanya 50x100 extrusion -...

The best place to get a rough idea of material removal rates, is to stick some figures into a speeds and feeds calculator (FS Wizard is free online, and good enough for most things).
Your approach...

I've just realised you mentioned that the cards do work with Druful, so the drivers must be fine.

The issue is possibly a more generic Mach3 issue, as Win11 may reject certain DLLs if it think...

Unfortunately, although I do have a Win11 laptop, I don't use it that much, and I've certainly not yet had any reason to look at how the device manager shows unrecognised devices.

If the driver...

My guess is that the driver (DLL) isn't security signed, so won't work with Windows 11.
If you look in Device Manager, does the card show when plugged in, and does it show as having any errors?

No, they're EtherCAT only, and the other two non-EtherCAT sets I've got lying around are destined for machines.

The PWM is connected to pin 1 on the parallel port, so it shouldn't be too hard to figure out.

Looks like they've patched the PWM signal into the original interface board, in which case you just need to work out the PWM settings to control the spindle speed.


You'd need to confirm, but if...

The machine has been running, so I'm guessing there must already be some form of isolation.
Going by the photos, I'm guessing P17 is being used to control the SGR (Spindle Go Relay aka switches on...

It's been a long time since I've used Mach3, so can't really help you there, but it'll depend on exactly how the speed control is being done. You'll probably have to trace the wiring to establish how...

Aliexpress/Alibaba is probably your best bet to get an idea of what the potential options are.
Aliexpress is generally full of resellers, but some searching of Alibaba usually reveals the real...

I have seen a similar design in the past (pretty sure it was actually on here somewhere).

It does work, but the Z-axis is a lot of work to get everything spaced correctly, and restricts access to...

You'll only get that torque if you run at the full current.
The lower inductance allows faster current changes, which ultimately results in better performance.

Unless your machine is pushing the...

I doubt you'll get a secondhand one, as the spindle motor is a bit of a weak point. However not as much of a weak point as the controller normally is.

Have you tried Arc Euro Trade?
And Machine...

Are 100% sure there are no grubscrews on the side?
And if there is, that they've not been doubled up?

SSRs typically switch at the zero crossing point, however that is the worst point to switch as it'll cause the biggest inrush, which is why they're a poor choice for switching transformers (plus the...

As it's only polystyrene, cutting forces would be very minimal, so well designed lightweight should be more than acceptable.



Robot control is all about kinematics.
As long as a robot could be...

It would likely still have worked with a 10k pot.
Even quick blow fuses, only trip fast if they see a big enough current. There are blow speed charts, which show that if only slightly above their...

Given those dimensions, you could probably fit a servo motor.