Giant 20' x 3' x 2' router build

[JAZZCNC]

Cheers thanks for that, are the digital drivers cnc4you good alternatives to the em806 only that they have been super helpfully through my build and offer great backup and support from them so far.

I understand what you mean regards supplier being helpful and it goes along way in my book too but you have to remember with any supplier they are always going recommend and Big up what they sell for obvious reasons. Helpfullness does also needs to be factored in but must say from folks I help and my own experience Gary and staff at Zapp are not unfriendly or awkard.!

Regards the drives then Honest answer is I haven't used those drives so can't comment on them. What I will comment on thou is the things they don't have compared to the Leadshine EM806 or DM856 which can become a major issue in some machines, esp large steel machines and machines with slaved axis.? . . . Resonance handling and stall detect.!

Most decent drives, inc the CW6060AC will have Resonance handling features built into them and some like the CW6060 will have more advanced algorithms to deal with resonance than others but essentially they still do the same in that they use a fixed frequency range or field of view along the motors speed curve.
The Leadshine drives come with a COM port so you can connect to them via software and adjust the drives resonance parameters. This can be priceless if you have a machine that is resonant and happens to be producing resonant frequencys outside the drives compensation field of view or dipping in and out so causing irratic or rough running motors.
If this does happen on fixed range drives then your stuffed and stuck with it but with EM806 drives you have full and fine control of the resonance handling.
If your thinking does this happen.? Then yes it does, esp on large steel framed machines or machines running resonant drive systems like R&P. It's just that often people don't know they have resonance problems as the drive is doing some compensation whick masks it and they just accept that the speeds or way machine runs is just how it is.!! This is Because unless resonance is really bad it doesn't stop motors running it just makes them run rough or lowers the speed you can get from them before stalling.!
Does it happen Often then again some times yes, esp on cheap drives but people don't know it. In most cases then folks won't have a problem but if you do have a resonance issue then you'll be highly pleased you bought the EM806.!!

This takes us nicely into the Stalling motors.? The EM806 as a nice feature in that it detects motor stalls and provides a Fault signal which can be used to E-stop the machine. This for machines running slaved motors is Vital to me and after using these drives I wouldn't run any slaved axis machine without this feature.

There are other nice features the EM806 offers like full Current tuning control and fully adjustable Micro stepping and fine adjustment amp setting 0.1A but they are secondery to the other 2 features which IME are worth that little extra.!!
Between these features if you have any issues you can deal with them and tune them out rather than just having to Live with them.!! . . . Priceless.!!