How Linear Actuator Circuits Work

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DPDT Heavy Duty Latching Toggle Switch (605048) (Center Off):
www.servocity.com/dpdt-heavy-...
SPDT Miniature Limit Switch with Roller Lever (605634):
www.servocity.com/spdt-miniat...
8mm x 12” lead screw (634050):
www.servocity.com/lead-screws
8mm Lead Screw Nut, 0.770" Pattern (545315):
www.servocity.com/8mm-lead-sc...
8mm Linear Ball Bearings (535226):
www.servocity.com/linear-bear...
8mm x 300mm Stainless Steel Precision Shafting (634314):
www.servocity.com/stainless-s...
8mm Bore Bottom Tapped Pillow Block (535104):
www.servocity.com/8mm-bore-bo...
8mm Bore Bottom Tapped Clamping Mount (585634):
www.servocity.com/8mm-bore-bo...

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Опубликовано:

17 июл 2024

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Комментарии : 107

@graffix 5 лет назад

You have no idea how thankful I am for your video! I am so thankful, I am going to buy my supplies from servocity now! Thanks

@ServoCity 5 лет назад

Larry, we're glad to hear you found our video helpful! As always, let us know if you have any questions tech@servocity.com.

@yanwo2359 7 лет назад

Good explanation, and clever use of diodes across the limit switches. And many thanks for no silly sound effects or distracting background "music."

@ServoCity 7 лет назад

Thank you, Yan. We're glad you enjoyed the video.

@g.s.3389 5 лет назад

finally a great video on linear actuators!!!! 👏

@plokijij7856 3 года назад

Exactly what I’ve been looking for! Thanks

@PsyrenZero 2 года назад

Thanks, I recreated this circuit with a relay instead of a switch and a prox switch to drive the coils. Basically created a gate using rope on the shaft with limit switches nearly matching exactly what you have.

@jesusllenza7893 7 лет назад

Excellent job, this gave me exactly the Information I needed. I've been looking for this info three days straight on RU-vid. I purchased some of these parts separate, but making them play well together was beyond me until now. My project consist of chicken coop automatic door opener. I am adding a thermostat (too cold wouldn't open), timer when to open and close, light sensor (dawn to dust), and the DPDT with limit switch (plus the diodes) which I now know I need to purchase. Awesome next video for urban chicken owners on how to wire their chicken coop automatic door opener that is self regulated all year round. 10 thumbs up - great job! Extremely thankful for your video.

@ServoCity 7 лет назад

So glad you found our video helpful! Good luck on your project and let us know if you have any additional questions tech@servocity.com.

@mazatrolmultiplex1113 6 лет назад

very good demo and useful . thanks

@alanprettyman675 2 года назад

Well done, very clear and concise.

@kashv1793 3 года назад

Thanks for such a good video.That's really helpful.

@billydamnit 6 лет назад

You are an excellent teacher. Thanks

@KulbirAhluwalia 6 лет назад

This is ingenious!

@ColinRichardson 7 лет назад

Nice video. You answered my "What's the point of the diode" question just as I was thinking it. Good Job. Might be beneficial to link to the parts you used in the build in the video.

@ServoCity 7 лет назад

Thanks, Colin. Glad you found it helpful. We've added the links.

@zasvvisss 7 лет назад

So informative, many thanks.

@ServoCity 7 лет назад

Glad you found it helpful!

@ajamstudios1701 2 года назад

Thank you for this video... This helped me a lot.

@favgramp Год назад

Well done video. Thank you

@chrismags2328 6 лет назад

thank you so much for this video :D God bless! :D

@sangarp2001 6 лет назад

very useful thanks.

@vosviddine95 5 лет назад

Thank you very much. Very very helpfull. Thank you so much.😀😀😀👌👌👌👏👏👏

@lawrencemccoy 3 года назад

thanks for the info...

@wjf213 7 лет назад

Great video. I've been looking for some thing like this for a Christmas display I'm building. I know you said send your questions to your tech dept. but since this video was posted almost a year ago, they may not know what I'm talking about. My question is, how do I do some thing like this, but with a time delay in returning to the start position, and do it all automatically, once it has been triggered to start? I was looking at a time delay relay. I really want to stay away from electronics and keep it simple with switches and relays since it is an outdoor Christmas display. Thanks and keep up the great work.

@marknugent9494 7 лет назад

Thanks, I have a technology project to make for my exam and you answered my question, "how do I use a DPDT switch and limit switches in the same circuit."

@ServoCity 7 лет назад

Glad we could help answer your question.

@jeffweber8556 6 лет назад

do you have a video explaining how to make the actuator in this video?

@themightymattp 7 лет назад

Could you provide a parts list for this build?

@joedirttae9152 5 лет назад

Great job explaining stuff without annoying music.

@ServoCity 5 лет назад

Glad you liked it and found it helpful.

@user-ur9of6ne8p 6 лет назад

thanks

@Stubby0266 11 месяцев назад

Could you show on how to set up the same system but using relays for higher amperage circuits where the switches, using less amps, to trip the relays to run the motor?

@mrz6320 5 лет назад

can you provide the diagram in picture pls? I can't really see the wiring of limit switch

@peternewton7991 5 лет назад

Hiya where can I get the same motor from?

@evarnado2423 7 лет назад

Just to clear something up, current in a battery flows from negative to positive and current flows against the arrow in the diode symbol. Just wanted to clear that up.

@mazatrolmultiplex1113 6 лет назад

what type of diod did you use?

@zv3000 6 лет назад

Hi , great explanation thanks for that ! i just finished building an actuator for a project i'm working on using this video as a tutorial although i used a couple of different parts to you. Instead of using a DPDT switch i used a SPDT switch . Well really thats the only difference . there is just one thing that i'm curious about i noticed that when the limit switch is depressed (Regardless of which one is depressed) when i flip the 3 way switch to spin the motor the other direction for a split second you can hear that the motor is taking advantage of all the available power but then once the limit switch is released and both are making contact it's fine . This only happens for a split second until the limit switch is released and makes contact again completing the circuit . Do you think i have anything to be concerned about ? could it be that the Diodes i used are too small?

@ServoCity 6 лет назад

If you want to have a technician review your circuit diagram please email it to tech@servocity.com we'd be happy to help. Thank you!

@vishwajeetbhagyawant4317 4 года назад

Hi!! I have some questions.. What is it's load capacity? an will it able to hold the load vertically at some position?? And how to calculate load capacity in vertical position??

@darkmuppetmaster 7 лет назад

Hi great video thanks. I'm using a 3.7 v actuator running off batteries could you tell me please what diodes I'd need. Sorry my tech knowledge is very low.

@ServoCity 7 лет назад

Partially that depends on how much current it needs to handle. Our diodes (part number 605126) can handle up to 5A and up to 40V. Here is an article (not from us) which has some more info on selecting a diode for your project: ourpastimes.com/choose-right-diode-7433946.html. Feel free to contact us should you have any additional questions tech@servocity.com

@jwhornex 3 года назад

Extremely informative. Hey, what's the name of the battery you're using?

@ServoCity 3 года назад

We show this build with a 3,000mhA LiPo battery. But if we were to do it again we'd use this battery: www.servocity.com/12v-3000mah-nimh-square-pack-battery-sub-c-cells/

@tedbastwock3810 3 месяца назад

Is it ok to reverse the diodes so the cathodes face one another instead of the anodes?

@BuildswithBrian 3 года назад

Interesting circuit, but wondering if this works with higher current drawing motors ? I have made the same operating circuit with a latching relay that can can control much higher current. Perhaps a video on that would help some of your subscribers

@ServoCity 3 года назад

Sweet idea! Thanks for the suggestion.

@user-nu6cg9cb2e 2 года назад

How / where in the circuit would a led signal light go to indicate extended (red) & retracted (green)?? Thanks.

@wardharriman8965 5 лет назад

Just a note. You don't really need diodes. You can put the limit switches between the DPDT momentary switch (direction) and the battery. The DPDT is then used to select the appropriate limit switch AND select the polarity of the battery. It's a bit more wire this approach eliminates the specification, purchasing, and wiring of the diodes all-together. Just to make it clear, this approach still uses the same DPDT momentary (for direction) switch.... just not the diodes..

@wolfy9005 11 месяцев назад

Diodes are often used to help prevent back-EMF from destroying your stuff though, they're cheap insurance

@ppgg997 7 лет назад

Ι have done something like that but with 2 relays...with 1 sounds more simple and clever way to do that. But the problem with both is that the relay coil will stay energized when the terminal switch is open :(

@omarcabrera3348 4 года назад

Great Video.... I have a question having to do with this type of actuator. My application would be for automotive. I’m interested in installing a wing on the back of my car, but I want to modify the mounting brackets to accept electric actuators..... so far it’s straight forward. However, I would like to to be wired up with the brakes/brake lights. I want the actuators to open when the brakes are pressed and brake lights come on and the when the brakes are released for the actuators to close. Just like the brake lights.... is this possible?

@ServoCity 4 года назад

Yes, that is possible. You would need electronics to tie in with the brake signal as you mentioned. Please feel free to reach out to us should you have any further questions to tech@servocity.com.

@paryzfilip 6 лет назад

Hi, I've got a question, is it possible to make a motor with lead screw as strong as linear actuator? I want to make a sit-stand desk, if I'll get a high thread-per-inch lead screw and a strong motor, can it hold on as much as a linear actuator? I think it may be cheaper for me than getting two linear actuator of proper size.

@ServoCity 6 лет назад

Hi Filip, you'd basically be creating your own linear actuator by driving a lead-screw with a motor. With the proper selections you can build a mechanism that would have plenty of thrust. If you have any specific questions feel free to contact our Tech Team directly at tech@servocity.com.

@ravikumar.a5600 6 лет назад

I have bye the connector which is placed in linear acututor

@tars5104 7 лет назад

how does the limit switch gets open or closed?

@ServoCity 7 лет назад

The switches are located on the acme screw inside the actuator tube. The switch will meet a stop when fully extended or fully retracted. Please feel free to contact our Tech Team should you have any additional questions! tech@servocity.com

@vanrex100 Год назад

Sir, what diodes you use for that one

@MrRackinroll 5 лет назад

Wow Just what I was looking for. My only question is a proper limit with 4 pole does it have a diode in it. ???

@ServoCity 5 лет назад

Glad we could help. There are two diodes; one for the inboard switch and one for the outboard switch.

@MrBANDITmc 5 лет назад

Hello, im interested in robotics and would like to build this for a short film im making, with your permission could i purchase the plans off you? I need to re-create this machine

@BigFatRoundCuddlyTed 2 года назад

Can you please help? Every tutorial I have seen, including yours, describes a circuit with just 2 diodes. I have 3 actuators, all faulty, and all 3 have circuits with 4 diodes, 3 orientated in one direction, with the 4th the opposite way around. The board has 16 nodes, 8 along the centre with 8 wires coming from it, and 4 above and 4 below this row of 8, to which the 4 diodes are soldered in place. Each of the limit switches has 3 wires connected to it, coming from the circuit board. The actuators operate from a 12v DC supply, so these circuits are NOT rectifiers, but instead seem to be a more unnecessarily complicated way of achieving the same purpose. They all seem to have issues with their circuits, but I am at my wits end trying to figure out how the current flows. Do you have any experience with these circuits, and if so, any chance of help please? Thank you, Alan.

@emilyhuang2759 6 лет назад

At 5:23. would the right one work if the diode switch polarity?

@ServoCity 6 лет назад

Hi Emily, yes it would. Let us know if you have any other questions tech@servocity.com, thanks!

@razidaufaa9626 3 года назад

Nice video sirr:). I am sorry, i want knowing your part name ??

@kashv1793 3 года назад

Can you please suggest a way on making it a three or more position actuator, that will be really helpful.

@ServoCity 3 года назад

Hello, In many applications, the most flexible way to do this would be using a microcontroller like an Ardunio, combined with a motor controller.

@kashv1793 3 года назад

Thanks for the suggestion sir, but I'm a noob. I'm just getting started with the arduino stuff. Can you please explain it in a bit more detailed way that would be really helpful sir.

@ServoCity 3 года назад

@@kashv1793 Please feel free to shoot us an email to tech@servocity.com! Our tech team would be happy to help you out more there.

@analanmanoharraja7602 6 лет назад

What motor you have used in this linear actuator? Please mention how many voltage and RPM motor you have used? I hope that you will reply. Thank you.

@ServoCity 6 лет назад

Hi Analan, I used a 612 RPM Premium Planetary Gear Motor (pn 638284) running at 12V. www.servocity.com/612-rpm-hd-premium-planetary-gear-motor

@analanmanoharraja7602 6 лет назад

ServoCity Thank you.

@davidsohlstrom6977 7 лет назад

good video. One point of interest. The Email I received lists in the components a DPST rather then a DPDT.

@ServoCity 7 лет назад

Thanks, David. We apologize for the mix up. It should say (605048) DPDT Heavy Duty Latching Toggle Switch.

@kipingky 5 лет назад

is it possible to add pwm dc motor speed controller into the circuit because sometimes I could not find the motor with the right speed for my need in the market here....thanks so much you help me a lot

@ServoCity 5 лет назад

A linear actuator is little more than a motor that's had the rotational motion converted over to linear motion. You can run a motor controller to adjust the speed based off the PWM signal being sent or you can run a motor controller with feedback and tie in the potentiometer so have position control. Step #1 of this ( www.instructables.com/id/Controlling-the-Actobotics-Dual-Motor-Controller/ ) instructable shows how to use the Actobotics Dual Motor Controller for speed control. Step #4 shows how to use the Actobotics Dual Motor Controller for position control. Please contact us at tech@servocity.com should you have any other questions and we'd be glad to assist.

@sachinchakravarthys1807 7 лет назад

Hi I have to discuss with you .

@rajkumar-lj3dm 4 года назад

Ac current use pannalama

@koniako1982 3 года назад

Great video!!!! I am struggling to find this kind of motor! Any idea here?? Thanks in advance!!!

@ServoCity 3 года назад

In this video, we used an HD Premium Planetary gearmotor. You can find it on the motors page of our website! www.servocity.com/motors/

@koniako1982 3 года назад

@@ServoCity thanks a lot for your reply and the link! I found my solution then!

@bravogolf5905 2 года назад

@@ServoCity You don't state which RPM you selected?

@MrBANDITmc 5 лет назад

Also, how did you connect the lead screw to the motor, and how many rpm is that motor as ive noticed a few variations on your website. Cheers

@ServoCity 5 лет назад

Hello Nate. Feel free to use that design. It has been a while, but I believe (and I think I can see at 1:02) that it was a 612RPM motor (sku 638284). The lead screw is connected with a coupler. I would recommend 625091. Here are most of the other parts used: 555176 (motor mount) 1612-0815-0045 ( linear bearing) 585640 (clamping mount for linear bearing) 585004 (pattern plate for base) 634314 (shaft) 3501-0804-0300 (lead screw) 545315 (lead screw nut) 545404 (pattern mount for lead screw nut) 585634 (clamping mount for shaft) 585720 (pattern plate for gantry) 535104 (pillow block) 605126 (diode) 605634 (limit switch) 605626 (limit switch mount) 585399 (mini channel under base) 585404 (beam as a trigger for limit switches) 605048 (toggle switch) don't remember for sure but I think I used a 585403 and maybe a washer to mount the 5-hole beam. Feel free to send an email to tech@servocity.com should you have any other questions!

@MrBANDITmc 5 лет назад

@@ServoCity thanks guys!! I really appreciate you responding so quick

@MrBANDITmc 5 лет назад

I forgot to ask what power source you used?

@Zxenmusic 7 лет назад

Servocity has no cranks. How do I build a piston with a motor? Worm drives are too slow.

@user-ce1pj9ei9d 6 лет назад

Hi. give me a schematic?

@edwinj.negron9584 7 лет назад

Hi. Which motor are you using? How much RPM?

@greengeckodesign 7 лет назад

612 RPM, Part# 638284 www.servocity.com/612-rpm-hd-premium-planetary-gear-motor

@tamyhanafi456 3 года назад

Is it compatible this system for tv lift?

@ServoCity 3 года назад

Please email tech@ServoCity.com with your specifications and they should be able to help you in more detail. Thank you!

@eleazarmina7239 6 лет назад

how to create this?

@ServoCity 6 лет назад

Hi Eleazar, you can contact our Tech Team directly at tech@servocity.com or 620.221.0123 with any particular questions about this particular build. At this time, we do not have this particular demo posted as a build online, but our team would be glad to help answer any questions you have about it.

@ravikumar.a5600 6 лет назад

Pls tell were u bought