I have a question that pops up out of curiosity while I was looking at other NEMA 23 steppers.

Does bigger size usually define higher torque?

Torque is generally decided by the current drawn by the motor, generally two motors of the same make and versions, increase in length usually is accompanied by increase in torque, modern Stepper drives maintain torque as RPM and inductive reactance increases, without special measures, a stepper motor will lose torque with RPM due to this .
Max.

 

Hi Berzerker, is this what you mean? Imagine there is a block in between both nuts welded to each side.

Yes
But I'm not sure about the "welding" part. Once a nut is tacked it tends to pull and can become out of center/alignment with the screw and cause undo wear on them. After you tack it then comes welding it. this can cause even more pull on the nut making it try to turn sideways on the screw. Welding also eliminates adjustments later on as the parts start getting worn. I think Max had a good idea about a spring on one end to place pressure on the slide and between the nuts if you have the room.

Brzrkr

 

Does bigger size usually define higher torque? For example, 2 NEMA 23 steppers: one having length of 5cm and another having 7cm. Is it possible to say that the one with 7cm length will have higher torque than 5?

Yes as a general rule. What you're describing is now as "stack" meaning the shorter one is a single stack motor and the second is a double stack. The stack means the number of winding coils and rotors in the housing, making it more powerful.

 

Hi Bob, the 7kg load is just an assumption made based on the expected materials to be used on Y axis. Y- axis is to be laid vertically on the carrier block of X-axis.

So it is going to weigh as much as a bowling ball and move up and down.

Bob

 

Yes as a general rule. What you're describing is now as "stack" meaning the shorter one is a single stack motor and the second is a double stack. The stack means the number of winding coils and rotors in the housing, making it more powerful.

I did a furthur reading here: https://www.applied-motion.com/news/2015/10/stacks-stacks

I see manufacturers (Oriental Motor, Minebea-Matsushita, Sanyo StepSyn, Shinano) has steppers of different length, often 3.5cm, 5.8cm, 7.6cm, 8.5cm and so on. How do I know how many stacks is in a stepper just by looking at the outside?

 

The increase in length usually indicates that the initial lowest size has been increased by effectively doubling the characteristics of the first, in effect just increasing the length of the stator and rotor and winding to suit.
This has the effect of doubling the torque value, Usually nothing more.

Generally all this can be ascertained from the manuf. spec sheets as you have posted.
Max.

 

What Max said

 

@Sp@ceR
Did you ever come up with a design/materials your going to use for it besides the screw and nuts?
Brzrkr

 

@Sp@ceR
Did you ever come up with a design/materials your going to use for it besides the screw and nuts?
Brzrkr

Yes I do. Refer to the main post there's a .png file for the design. I have received most of the parts such as stepper motor, driver, slide table and rail, lead screw and nut and gathered some metal parts for the frame I got from the workshop. I still lack bearings and shaft coupler which will be ordered next week.

 

Torque is generally decided by the current drawn by the motor, generally two motors of the same make and versions, increase in length usually is accompanied by increase in torque, modern Stepper drives maintain torque as RPM and inductive reactance increases, without special measures, a stepper motor will lose torque with RPM due to this .
Max.

Max,

May I know what type of modern stepper drives you are referring to?

By the way, what driver do you recommend for a 2-phase stepper Motor (Mfg. No:Sanyo 103h7823-0715) with current rating of 3A besides TB6600? The closest I could get is Oriental Motor CSD2120-T which can supply current up to 2.8A.
Motor Mfg. No (Sanyo 103h7823-0715)

 

Max,

May I know what type of modern stepper drives you are referring to?

One Universal Manuf. that has decent reputation and support is Gecko, you could always shoot them an email, they are usually very helpful.'
Max.