Some questions to JAZZCNC or any other closed loop stepper experts

[m_c]

Where and in what way?

If you have a 1:6 gear you WILL get a 6 times increase of torque at ANY given rpm between zero and infinity. Period.
If you have a 1:6 gear you WILL get a 1/6 reduction of rpm at ANY given rpm higher than zero rpm. Period.

What is wrong in the above two sentences? If something was not clear in anything I said before then of course, a clarification should be asked for, but with an explanation of what is not clear, or what is wrong.

Of course, it should be clear and obvious to anyone that I don't mean the holding torque. Holding torque is only multiplied by six at zero rpm. For a servo if the torque is constant, the increase is 6 times all the way. Isn't all that true? I mean, I am an engineer (with more than forty years of experience and a few of my own inventions), but not on the mechanical side and I may have missed something, or didn't use the right expression or words, but that's not the same as I am a stupid idiot who is trying to redefine the shape of the earth or something. However, without explaining my mistakes nobody is helped and nobody is learning anything.

But OK, this is the Internet...



I know that, and as far as I remember, I made that clear before also. Some people talk about AC (powered) servo as if it was something special. The only special thing about them is that the rectifier is built in the driver, because otherwise internally, I think they are the same. But of course, I never had one, never opened a driver for a servo, so I don't know for sure, but I strongly suspect that is the case. The only advantage is when you have really high powered servos which can be fed directly from the wall mains. It makes wiring much simpler. Of course, it is simpler also if all you need is a transformer, but if you already have a fat PSU with a good enough voltage then there is no benefit in going to AC powered servo, unless you need to replace that PSU due to the size of the servo. In that case, of course it would be dumb to buy (or build) a new PSU when one can use the AC directly from the wall.

And as per usual, you completely missed, or simply chose to ignore the bits Muzzer and I were correcting you on, with a big long rambling post.
I'm out. Have fun, interpreting things in whatever way you wish to chose, even if that interpretation is completely wrong.