[kool-lites]

I have a couple of motors.
both are 23 size.
Both have 4 wires

Motor #1
3.5v /phase
1 amp /phase
Minebea branded

Motor #2
5.4v /phase
1.5 amp /phase
Vexta Branded

I am new at this. So I now trying to work out how they will preform and how hard I can drive them.
This should then allow me to choose a suitable controller.

[irving2008]

Are there no part # on the motors?

At a guess these are fairly low torque i.e. typically 1 - 1.4Nm (141 - 200oz-in) as a 1A - 1.5A NEMA23 motor suggests an older design - most now are 2.1A or more.

Being 4-wire means these are probably internally wired for bipolar series connection, so these are not going to be speed freaks...

Without part numbers only some inspired guesswork is possible:

Minebea make custom steppers so you may not find an exact match but their current catalog would suggest a 1A/3.5v (=3.5ohm winding) bipolar would be around 0.8Nm (110oz-in).

Vexta don't currently offer a 4-wire motor rated at 1.5A, but the rough equivalent from an older catalog is 1.4Nm (200oz-in).

Both of these are likely to be relatively high-inductance, 8-12mH/phase due to the series windings.

[kool-lites]

Sorry for the long delay in responding

Motor #1
3.5v /phase
1 amp /phase
Minebea branded
Part Number Mineba 23LM-K202-p2

I would like to know what voltage I should start playing with.
I got these pretty cheap so am happy to use them to learn with before I biuld the router.

I am also thinking of building "egg Bot" and these steppers should meet the challenge.