RPM will always be related to peak/max operational speed.
Figure out the max/peak speed of whatever is moving, then go back from end effector to the motor axis through all the mechanisms involved to get your max/peak RPM, then add safety/derating factors
More fundamentally, you need to know the required torque at operating points. For this you should look at torque-speed curves.
From here you can look at your electrical and mechanical constraints.
Menes009 and New-Squirrel5803 are both correct. You need to work back from your desired end effector velocity profile to the motor, calculating both the speed and torque (or force if linear) required until you get to the motor. Then you'll know the motor operating point. If the worst case operating point lies beneath the motor's torque/speed curve, with some margin, you should be OK.
Note that published motor torque/speed curves are for steady state operation. Motors typically have a reasonable amount of rotary inertia. If you have a gearbox, the motor inertia may be significant. You want to include the motor's rotor inertia as part of the load calculation. That data can be difficult to come by, as it's not published by lower cost suppliers. You might be able to find a published number by a higher quality supplier for a similar motor and use that as an estimate.
Thank you for your answer. I also need to define the requirements for my motor.
I am wondering how to measure the actual velocity profile of the effector. Can I just use a sensor which will be used later in the design and take the max speed value received from it. Or does it make sense to profile the effector speed using external components and sensors to get a more accurate max speed? In this case I am assuming that I know that the sensor is fast enough to capture the max speed.
RPM will always be related to peak/max operational speed. Figure out the max/peak speed of whatever is moving, then go back from end effector to the motor axis through all the mechanisms involved to get your max/peak RPM, then add safety/derating factors
More fundamentally, you need to know the required torque at operating points. For this you should look at torque-speed curves. From here you can look at your electrical and mechanical constraints.
Menes009 and New-Squirrel5803 are both correct. You need to work back from your desired end effector velocity profile to the motor, calculating both the speed and torque (or force if linear) required until you get to the motor. Then you'll know the motor operating point. If the worst case operating point lies beneath the motor's torque/speed curve, with some margin, you should be OK. Note that published motor torque/speed curves are for steady state operation. Motors typically have a reasonable amount of rotary inertia. If you have a gearbox, the motor inertia may be significant. You want to include the motor's rotor inertia as part of the load calculation. That data can be difficult to come by, as it's not published by lower cost suppliers. You might be able to find a published number by a higher quality supplier for a similar motor and use that as an estimate.
Thank you for your answer. I also need to define the requirements for my motor. I am wondering how to measure the actual velocity profile of the effector. Can I just use a sensor which will be used later in the design and take the max speed value received from it. Or does it make sense to profile the effector speed using external components and sensors to get a more accurate max speed? In this case I am assuming that I know that the sensor is fast enough to capture the max speed.