Lathe suggestions?

[routercnc]

Enough wiring, time for some machining . . .

[routercnc]

This week I got everything together, turned it on . . . .and damaged the encoder.

Bonus footage - inside the encoder and how it works (or should work)!

[JohnHaine]

Looking at the website the machines look the same as the generic Sieg / Weiss products from China. Not necessarily any the worse for that but probably not made entirely or even partly in Germany. Similar machines also available (though much more limited range) from Arc Eurotrade who have an excellent reputation.

[routercnc]

Yes these are imported by Warco from China. When I was researching these I compared the spec to Arc / Sieg and Chester and these were slightly better spec for the same money. I’ve been pleased with it over the years but that hasn’t stopped me tinkering!

[routercnc]

More progress but still having issues with the ELS system - something still not right with the rpm signal . . .

[Muzzer]

Bummer.

Have you got a link to the schematics? I could have a look for you to see what the encoder input circuit looks like, perhaps get an idea why it stopped working.

I'm an electronics engineer working in motor drives etc so you never know, I might spot something. Must be frustrating for you!

[routercnc]

Spoiler alert for the next video! I've manage to get it all working by removing the encoder screen connection to ground. I had wrapped the screen around the cable where it enters the GX16 plug to ensure it was grounded (as James suggested) but it turns out the VFD noise is coming INTO the enclosure that way through the earth cable. Removing this encoder shield ground connection at the GX16 plug completely solved it.

I did look into buying more surface mount transistors but decided it was more hassle than it was worth and just bought a new one.

But since you asked it might be interesting to know if the original encoder could be saved so I've attached the schematic. It only shows the encoder output parts, not the internals. I broke it by connecting the Dupont connector backwards so the MCU pins are on the left, and the accidently reversed connector is on the right showing what went where!:

MCU pins left to right: My accidental reverse connection to:
0V_________________->A
+5V________________->B (NOK!)
index pulse Z________ ->Z
B _________________ ->+5V (NOK!)
A _________________ -> 0V

So you can see pulse B got the wrong signals and that appeared to be the most damaged channel.


Mine is not an Omron (I guess it is a clone) but it appears to match the one in the first column, 1024 P/R
https://www.ia.omron.com/products/fa...ification.html

Encoder:


Circuit:


MCU:

[routercnc]

Still more issues . . . . but we got there in the end!

[routercnc]

Something a bit different now - I've reviewed this tailstock DRO from Linn tools. Have a look and see what you think . . .