and if I need one with the best step angle (max 200eur) and not so hard to configure with an arduino UNO ? Thank you very much
@Sergio You should find a stepper motor with the best step angle (most are 1.8, though many are 0.9 degrees per step), and then choose a stepper motor controller which can provide 1/2 steps and even 1/4 steps.
Hi, I am looking for an actuator that can punch an object roughly the size and weight of a marble and set it rolling at least 5 meters.
something like a plunger used in pin ball machine that can be controlled electronically.
what would you suggest?
Hi, I’d like to make a robotic arm that punches objects, so I am looking for a very fast linear actuator with great force. I don’t care about the size. What would you suggest?
hello, i need help on a robotic project
@Amban We will do our best to help, but it’s best to create a new post on the RobotShop Forum and provide as many details as possible.
Hi I’m looking for something that can twist a dial knob to off position 0°, 60° run, 120° start, and back to run then off. What would you sughest?
@Santiago Gonzalez JR If you want the process to be automated, consider a servo motor (which can rotate 0-180 degrees with absolute positioning) and a microcontroller to program the motion / angles. The choice of servo depends on the torque and rpm you need. The microcontroller needs only to be able to control a servo. Last, you will need a power source of 4.8V to 6V (wall adapter or battery pack).
Hello, I am working on a robot and using 3 motors to actuate its movement, the motors are of type 24 BYJ-48 driven by an Arduino UNO board. I need to change the rotary movement to linear but I am don’t know what linear actuator to use. The robot is just a prototype and not much force is required, but as I was searching online for linear actuator screw I couldn’t find any that work with the motor I’m using, can you provide me with any guidelines on that? Thanks.
Two classic ways to change rotational to linear motion are:
- Lead screw
- 4-bar mechanism
It’s not easy to find a lead screw for a specific actuator, so it’s best to either use a long machine screw and a shaft coupler, or a shaft coupler and threaded rod. Regarding the 4-bar mechanism, it’s likely a lot easier to produce, but the linear travel might be limited.
A lead screw is almost always used in DC linear actuators. Ex:
hey, im trying to build a actuator or servo needs to provide linear motion, have a travel rate approaching 1" per second and an overall travel of 1.5". Forces that the actuator must overcome will be determined during ground rig testing this Fall,but it is estimated that forces will be below 25 lbs. do you know how to find the best motor for this?
thanks
@Qalex91 Any reason why you would not choose an off the shelf linear actuator with the right specs? https://www.robotshop.com/en/actuators.html
If you really want to design your own, you’ll need a lead screw (and complete specs), gearing and the motor. The gear motor can only be chosen wit the lead screw.
Hi me and my team are planning to build a four legged wheel robot for harsh environments and unstructured terrains which can carry a load of 100 kg. We need a rotating actuator for this purpose. What will be the best option to use? Any preferable options currently available?
@QShaikh Welcome to the community. You wrote “four legged wheel robot” - can you provide a drawing showing the configuration? Note that a 100Kg payload is really impressive and will take a LOT of torque to support. Boston Dynamic’s BigDog could support up to 150Kg:
The design is still in the process. Stuck on choosing the actuator since a while now.
@QShaikh Do you have an idea of your overall budget? You can use that to estimate a budget per leg, and then per joint.
Overall budget is 1500£. If i find an actuator which is 100£ each that would be ideal.
Can only think that a linear actuator might have the force needed to support ~100Kg.
https://www.robotshop.com/en/actuators.html
Finding a rotary actuator which can provide the torque needed to support a 100Kg robot… have never known of any.
You might really want to scale back the project to a robot which can support ~1Kg rather than 100Kg.