welding steel base or just getting aluminium extrusion

[Desertboy]

I don't know if anyone has done a controlled side-by-side comparison of the AM882 and the EM806. I bought the EM drives for my machine as I was fed up with buying things that seemed to go obsolete almost as soon as they were delivered and the EM series was still fairly new on the street, with supposedly better anti-resonance algorithms, etc. That was around 3 years ago but the AM drives are still going strong! However, I can say that I am very happy with my EM drives - no resonances ever been apparent, and the anti-stall is very useful if for some reason the gantry has gone out of square and loads get too high on rapid feed. Machine stops quickly without tearing itself apart. Would the AM drives have worked as well? Dunno!

One day I'll make up a serial cable and try to set up the autotune properly. Still slightly confused about how that's supposed to work with a dual-motor setup as you clearly can't do it with the motors connected to the ballscrews, but it doesn't seem to make sense to try to tune the motors when they're unloaded.

That's what we need is a side by side comparison, when I build my next router I might go with EM806's (Although planning the easy servo drives with matching motors) just to compare with same toroidal PSU setup. They are plug compatible so could relatively easy swap them over just for testing.

They don't sell EM806's on alixpress and the suppliers I contacted said they don't sell them in Asia they are only sold in US and Europe but I always take what suppliers say with a pinch of salt lol.

On the clone issue I think it's how good a clone is it? If the clone performs and works exactly the same then the issue is slight, if it's a poor clone then problems occur.

I have no idea if my AM's are clones but the internals look identical when I stripped them down and they all seem to perform the same. Almost silent performance if I set the microsteps to 32.

https://www.youtube.com/watch?v=O4_u5ov-9cc

I'm going to set them to 8 for now which makes them sound like normal whiney steppers but more torque of course.