[john86126]

yea I realized that after I already bought the board so im trying to figure out my options

The motor needs 3 amps. With 1.5, you will only get half the rated torque.

[H500]

Why not set it to 2.5A, the max supported by the board? You might be able to do 3 if you add a fan.

[john86126]

Why not set it to 2.5A, the max supported by the board? You might be able to do 3 if you add a fan.

the board tells me I cant because im using half coils

[H500]

the board tells me I cant because im using half coils

A 4 wire motor is the equivalent of bipolar parallel. You can use the full rating.

[john86126]

A 4 wire motor is the equivalent of bipolar parallel. You can use the full rating.

even if its a six wire motor?

[H500]

A 6 wire in the half coil mode has the same spec as unipolar.

I forget which motor you are using.

[john86126]

yea thats why i was thinking about switching to the 4wire motors

[H500]

Your 6 wire motor is rated at 3 amps unipolar. Half coil rating is also 3 amps.