Motor Terminology

Sounds to me like it's a bad translation, referring to a leadscrew drive.

"1 Screw round : 8 mm" - Each turn of the leadscrew results in 8mm of linear motion.

"1 motor round = 4096 points" - the motor is fitted with an encoder or resolver giving 4096 counts per turn.

i really appreciate your help because there is little clue as to what exactly is talking about.

You're welcome - but for future reference, you're more likely to get a decent reply if you give a bit more background. Is this from a specification against which you have to tender? Is it from a user guide for some equipment you've purchased? Or what?

The more information you can give (stated concisely - don't ramble on for pages & pages! ), the better will be the quantity and quality of your replies.

As a matter of fact, i am a technical translator in china and those questions are what i have copied from my colleagues coz they are technical guys and they ask me a lot of questions in so many areas that i sometimes have difficulty answering. So i come here with a humble heart to seek help. Sorry if i do not give enough background info on the quesions. ANd i am an eager learner too. Hope you guys can help if you can. I really appreciate your help. Many thanks again~~

Can you give us any more background? There seems to be a bit of a difference of opionion about "screw round".

Do you know the rpm of the motor? The 483/110 might be a reasonable gearmotor ratio, but where would 483 input rpm come from, if that is what it is?

JohnDG's guess of "round" = "revolution" makes perfect sense (GA), along with the ideas about lead screw and encoder.

I have some doubts about the arithmetic in the OP, but I will have think about it more.

' .... "screw round" represents the nominal OD (outer diameter) of the screw'

What do you base that on?

I would tend to agree with your raised eyebrow.. OP says "1 Screw round : 8 mm", the reference number 1 indicates to me 1 of something... perhaps revolution?