the problem is that the motor barely moves
the torques is almost null, I can stop the rotating screw by barely touching it
I found the optimal delay between phase changes is between 1000 and 1500 microseconds
I use a lab power supply for the 5V to the motor and the l298 is commanded via a 595 serialy interfaced to the arduino (I already tested successfuly my setup with dc motors before)
The datasheet says 2,5mNm pullout torque. That's not very much. If you think of that a hard tightening with a "normal" screwdriver is about 2,5Nm you get 1/1000 of that. So there is nothing strange about you being able to stop the screw with your fingers
rompelstilchen:
I use a lab power supply for the 5V to the motor and the l298 is commanded via a 595 serialy interfaced to the arduino (I already
As far as I know there is a considerable voltage drop in the L298. Maybe you need a higher voltage to get 5v to the motor coils?
Post a diagram of how you have things connected (a photo of a pencil sketch will be fine)
Post your code and please use the # button so it looks like this
rompelstilchen:
I use a lab power supply for the 5V to the motor and the l298 is commanded via a 595 serialy interfaced to the arduino (I already
As far as I know there is a considerable voltage drop in the L298. Maybe you need a higher voltage to get 5v to the motor coils?
Post a diagram of how you have things connected (a photo of a pencil sketch will be fine)
Post your code and please use the # button so it looks like this
...R
lol, I already been told l298 were weak, wonder why they have been engineered and sold
but he motor sometimes get hot,so I guess it is not a voltage issue
the l298 schematic I used is really basic, commands come from the arduino (via 595) and a lab power suppliy is giving the VSS to the motor coils
nilton61:
The datasheet says 2,5mNm pullout torque. That's not very much. If you think of that a hard tightening with a "normal" screwdriver is about 2,5Nm you get 1/1000 of that. So there is nothing strange about you being able to stop the screw with your fingers
I found this one but it is in kg/cm so I dont know if this is stronger or what
edit : after calculation (1nm=10kg/cm), it should be like 8 times stronger...
Robin2: Post a diagram of how you have things connected (a photo of a pencil sketch will be fine) Post your code and please use the # button so it looks like this
lol, I already been told l298 were weak, wonder why they have been engineered and sold
but he motor sometimes get hot,so I guess it is not a voltage issue
the l298 schematic I used is really basic, commands come from the arduino (via 595) and a lab power suppliy is giving the VSS to the motor coils
Guess I'll have to find another actuator..sh!t...
It is entirely your decision if you decide to spend money on a different device rather than providing requested information that would enable people here to help you. But it doesn't seem sensible to me.
0,2 kgcm (which is almost bullshit since kg designates mass not force, should be kp which is NOT an SI unit) equals 0,002kpm. Since 1kp == 9,81N the result is 0,01962 or 20mNm which is 7,8 times the original torque. You can count on that the specified torque is measured at the highest specified voltage (what else would you expect from salespeople..) As i understand this is a standard servo that can be controlled from the arduino directly without the need for a driver, just a 5V supply
Same goes for oz-in or lb-ft, assumed force under 1G.
L298 are fine with higher voltages. Not really meant to drive steppers from such low voltages. Definitely not expected to be used with such a tiny, low current stepper.
Just looking at it, I can tell it is such low torque I'll be able to stop it with my thumb and forefinger.
Why are they rating a linear servo with a torque rating? It should be a simple force rating in g or mN.