Any USB/Ethernet controller suggestions?

[JAZZCNC]

Fine, but then why debate with me and not giving him better advise?

I didn't need to give OP any advise because the correct advice had already been given by others. Unfortunately thou not by you and thou you don't like to hear this it must be said for the benifit of others.

My own experience is just as valid as anybody else's, but if I am wrong, fine, explain why and where so we all can learn something. Saying that I am wrong does not help anyone.

Yes your advise if valid agreed to a point.! . . But to spout and I quote "My machine is as fast as it can get and is much better than most other stepper based machines with direct driven ball screws can do, so I really don't know where digital drives could make a difference."
without any experience of ever using Digital drives and probably with same amount of experience of other machines with same setup to me just cancels out any validity to anything you said.

It doesn't help if in theory, it can spin faster when in reality the limits of the ball screw is reached. Of course, if you just spin the motor milling air (or just spinning) then it may be smoother and faster but will you REALLY see any difference in real use? Will the difference REALLY be as much as the difference in price? I doubt that.

How do you know you have reached the limit of the ballscrew.? I'm guessing your using 5mm pitch screw and I can tell you with 100% certainty thru lots of experience that 50V Analog drive with 3A motor, which will probably be running 40-45Vdc cannot get any where near the limit of 5mm Pitch screw that is correctly fitted. Even a 50V Digital drive with same voltage won't get near it's limit.

I suspect your going to quote ballscrews Critical speed in reply to this but I'm talking real world usage which is very different thing so don't waste your fingers.

"Shitty driver" is the TB chips based drivers, not the DQ542MA. Anybody who claims the DQ542MA is a "shitty driver" has no idea about what he is talking about. Yes, no doubt that the digital drivers are better, the question is just how much better. Dismissing my experience is fine by me, but if you want to help the OP then answer his questions.

No your the one who has no idea what he's talking about and here's why. The DQ542MA are just copies of original leadshine M542. Which in there day were just an average Analog drive, nothing special. As time went on Analog drives got little better with more advanced chopper circuits etc but still had limits/issues under certain setup/circumstances.
Jump forward several years and Digital drive arrived and even the early drives where major advancement from analog drives and when compairing to Cheap copies of Analog drive like DQ542MA where very big difference.

The current crop of Digital drives are light years more advanced than Analog drives with the end result being far superior performence gains in overall speed and much smoother performance at lower speeds and generally across the rull RPM range compared to Analog.
Combined then these make considerable difference in performance and I've seen machines with Old Analog drives which struggled to reach 1000 rpm instantly spin same motors at 1500rpm with smoother action and far less heating.

Now just to show I'm not just talking theory or got feeling in my water Digital may be better.! Watch these videos which I took to try and show others the difference Digital drives make. Also Just note that the videos don't actually tell the true picture or show the true difference in sound or smoothness. The same machine with only a drive change went from a maximum rapid speed of 8mtr/min to 15mtr/min.!! . . . And if you still think I'm bull shitting then I've got witness who can back this up in form of Clive S.

Anyone who's done there research on this forum will have seen that many many times I've expalined and shown why Digital is better. Every thing I advise is based on real world hands on experience, like wise If I recommend or call something bad it's based on me using or experiencing this product. Or I make it clear I've not used them but know from trusted sources that are good/bad.

Unlike you I would never put down or Dismiss something without first experiencing. Also I do get tired of repeating my self so please don't try giving me shit because I've not choosen to repeat my self but instead decided to try helping others by highlighting your Bad advise.