![]() Once you know these values, take an average of them - that will give you the overall rotor coil resistance. Mark down every value you can read make sure you rotate the shaft a least one full turn - you may want to rotate it a few turns, noting the common values. Slowly rotate the shaft of the motor, noting the resistance on the meter. ![]() Once you can do that, hook a multi-meter set to measure resistance to the yellow and orange wires (according to the ebay writeup, these are supposed to be the wires that control the motor - in fact, they should almost directly lead to the motor's terminals). Basically - you just want the motor to be free spinning, so you can move the rotor by hand. The best way to do that on this actuator to avoid damaging it would be to open the actuator up, locate the motor, and attempt to disconnect the motor from the geartrain (additionally, this will also allow you to assess the geartrain and its construction, and also whether the grease and such in it needs to be cleaned and replaced - remember, these are likely used and/or surplus devices, and as such may need a bit of TLC to get them into best running). So, in order to move forward properly, you -must- know what that current need is (especially if you plan to drive 8 of them later - so you can size your power supply). Generally, this may mean that the current the motor draws could be quite substantial at startup and during running. This particular actuator you have, though, was likely meant for an automotive application - so keep that in mind. I won't go any further on this or other linear actuators or how they work plenty can be found online. In your case, it is fairly apparent how this is being accomplished, via probably a simple spur-gear drive to a rack gear that is the linear motion part you see sticking out of the case of the actuator. Most linear actuators are simply DC motors connected mechanically (via a gear train) to move a shaft in some linear manner. Sorry for the total novice status here, any help would be much appreciated and if someone would like to write a tutorial on the topic I would be much obliged! How do I control my actuator, what code do I use? I need to be able to turn off for a certain amount of time then turn on for a certain amount of time, extending and retracting fully each time.Įventually I need to control around 8 of these motors with the arduino, is this possible and what would I need circuit-wise in order for this to work? How do I wire up my linear actuator to my arduino uno? (Do I need any extra components for the circuit? resistors etc.) Please see what I would like to know below: I am afraid I am new to controlling motors with an arduino and so need help with pretty much everything, as there does not seem to be a tutorial which I can find online for wiring up an arduino uno with a linear actuator. ![]() I have recently bought a cheap linear actuator from ebay see link to model and specs here:
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