Advice on these steppers -Nema 24 Stepper Motor 24HS34-3008D

[CharlieRam]

Thanks for explanation :) it seems I have 3 options then...

1. Risk the 3.1Nm (57v) steppers with the 70v PSU
2. make a lower voltage supply for the 3.1Nm steppers
3. choose the less powerful 1.89Nm stepper which is 81v?

Option 3 seems like a step back to me though so I may try and build the supply and see what voltage I get and decide whether to change out the Toroidal transformer.

Cheers Guys

[driftspin]

Thanks for explanation :) it seems I have 3 options then...

1. Risk the 3.1Nm (57v) steppers with the 70v PSU
2. make a lower voltage supply for the 3.1Nm steppers
3. choose the less powerful 1.89Nm stepper which is 81v?

Option 3 seems like a step back to me though so I may try and build the supply and see what voltage I get and decide whether to change out the Toroidal transformer.

Cheers Guys

Hi charlieRam.

I think what everybody is saying: there is no real risk.
Else they would say:
Dont do it, it is going to fail.
People here will tell you if your going in the wrong direction.

What i am reading between the lines is :

- They key factor is limitting the max current in the stepper driver settings.
- Higher voltage is an advantage to go fast.
- To high voltage can become a problem. -
- You need to check while running at max performance (rpm) for long periods.

I guess you will not be running at max rpm all the time.

Steppers are easily monitored by checking the temperature of the steppers.

Do this while commisioning the setup and learn to know your machine.

For me, motor calcs advised 57 volts. I run 4nm nema23 steppers, i have unregulated 72volts psu.
Until now i run 15% under max current.

I have to check software driver setup to set my drivers at the exact max.


My steppers never get above 40 deg.
My drivers reduce to 50% current at hold conditions

I have no performance issues.

I calculated for 2m/min cutting speed @50N cutting forces.

I have been cutting mdf @ 3m/min.

I am very happy with the guidance i got from here.

Grtz Bert.



Verstuurd vanaf mijn SM-A320FL met Tapatalk

[Clive S]

I think what everybody is saying: there is no real risk.
Else they would say:
Dont do it, it is going to fail.
People here will tell you if your going in the wrong direction.

Exactly All the machines I have done the motors have never gone above 40C. There is a big difference between theory and practice, too many variables.

Very seldom will the motors draw full current.