What is the specification of Stepper motor

[sanjiv]

I have 6 nos stepper motors. Nothing is written on these motors but are identical in shape & size. Is there any clue to find motor voltage, current, step angle, torque? what are the essential tools/ equipments required for the same?

[rgammage]

Hello Sanjiv

From my recent work I would start my questions with ...
How many wires?
If the fixing end is square what is the hole spacing in inches?
How long is the motor (fixing flange to the end of the motor)?
If you have the means ..... what resistances can you measure between the wires you have?

That will do for now ...

Regards

Richard

[laserengraverex]

stepper should be 1.8 degree or less
usually Nema23 comes with upto 3.0 AMP,
4,8 wire both can set to work with step & direction driver you can set unipolar or bipolar
the torque up to 400 oz/inch max

[AlanD]

Stepping motors without labeling may be VERY difficult to access if you don't begin with some physical clues - in addition to the electrical connection/resistance a PICTURE may help a great deal. There is a semi-direct relationship between size-torque - BUT - 'evolution' in design has had a major effect upon the size:torque relationship. Unless there are significant physical clues I believe you will need to 'test' them and measure the performance being mindfull of temperature rise.

[Anodizer]

Another thing that would be nice to know is the impedance of the windings.
Some formulas use it to derive some parameters.

In my stock room here at work, I have a lot of stepper motors that do not have full ratings listed. Some are very high voltage, low current and some, about the same size, have lower voltage ratings but higher current.

That seems to be a problem with salvaged motors, it looks like nobody uses of the shelf items, but custom units.

Do you know what they were intended for in the first place? Sometimes reverse engineering works.

[susan]

Avtually we can not identify the identical motors from appreance,we just have to use different equipments to measure different parameter,we use voltage meter to measure voltage,and amperemeter to measure current and so on.Otherwise the only way is to cut it off,if you just want to know the type. see how many poles there are,if there are 8 poles,it is 2-phase or 4phase,and if there are 12 poles ,it is 3-phase,and if there are 10 poles,it is 5-phase.