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retro fitting superflow 901 ok! ready to do this, need help please  

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(@boz-race-engines)
Member

this

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Posted : 12/09/2020 6:10 pm
(@boz-race-engines)
Member

would this be powerful enough?

This high torque and precision bipolar Nema 17 stepper motor with 0.9° step angle (400 steps/revolution). Each phase draws current 2A, allowing for a holding torque of 46Ncm(65.1oz.in).
Specification

Manufacturer Part Number
17HM19-2004S
Motor Type
Bipolar Stepper
Step Angle
0.9°
Holding Torque
46Ncm(65.1oz.in)
Rated Current/phase
2.0A
Phase Resistance
1.4ohms
Recommended Voltage
12-24V
Inductance
3.0mH±20%(1KHz)

This post was modified 1 week ago by boz race engines
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Posted : 12/09/2020 6:12 pm
(@boz-race-engines)
Member
(@boz-race-engines)
Member

would 3nm be enough torque to operate the water brake valve? cheers

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Posted : 13/09/2020 5:42 pm
(@boz-race-engines)
Member

@mach_1 hi do you think 3nm torque would be enough or do i need bigger? cheers

 

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Posted : 13/09/2020 5:46 pm
(@mach_1)
Member

Yes 425oz.In/3Nm stepper motor is ample

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Posted : 15/09/2020 11:16 am
(@boz-race-engines)
Member

@mach_1 awesome thanks mate, all ordered, i ordered a hybrid bipolar style as they reckon they are more powerfull and dont lose position, so close now

This post was modified 1 week ago by boz race engines
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Posted : 15/09/2020 4:41 pm
(@admin)
Member Admin

Sounds good. The Land & Sea valve is just 55 steps from fully open to fully closed, and it works surprisingly good. It hunts between steps a little in steady state, but RPM control is very good. 

But your idea of 400 steps should work good too. Otherwise you can try the micro stepping option, which most controllers support. 

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Posted : 15/09/2020 10:21 pm
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