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  1. roshane87

    Lifting Mechanism Force Analysis

    Hi desertfox, Angle A and B will vary with the height it's lifted. However, I can measure Angle A (and corresponding angle B) when it's at the lowest height and do the same for the highest because I will be determining where the chain gets fixed to lift the conveyor up. The Force F and C of G...
  2. roshane87

    Lifting Mechanism Force Analysis

    Hi desertfox, If you could please confirm if my assumtions are correct please? We know the Mass of the conveyor is 1200kg. Therefore, since we are only considering one side we can assume M = 600kg. If we balance vertical forces - R1y + R2y + Fy = 600g If we balance horizontal forces -...
  3. roshane87

    Lifting Mechanism Force Analysis

    Hi desertfox, Thank you for your quick reply. As you may have noticed this is a machine that I am currently designing so I realize some things while designing. The Pulling Force (F) will be at an angle so it will also have 2 components. We can also assume F passes through the C of G or is very...
  4. roshane87

    Lifting Mechanism Force Analysis

    Hi Everyone, Apologies for the confusion regarding the arrow up but as the subject says, the purpose of this arrangement is to lift the conveyor up from the tank it sits in for cleaning purposes. Therefore the arrow up indicates where the lifting force will be applied to lift the conveyor up...
  5. roshane87

    Lifting Mechanism Force Analysis

    Hi Everyone, I am in the process of designing a lifting mechanism for a conveyor and I'm struggling to get my head around the reaction forces at the pivoted joints. Could someone please help me find out what R1x R1y are please ? Any tips would be most welcome. RN
  6. roshane87

    Motors for Stacker System

    Hi Brian, I too was concerned about the frequent start-stop affecting the AC induction motor. We have used an external fan in instances like that with success. However, as you say, it seems like the servo is the best suited for the job. Thanks for clarifying these for me. RN RN
  7. roshane87

    Motors for Stacker System

    Hi Brian, The conveyor belt is about 1.5m long and the stacker needs to move (stroke) about 1.2m max but that depends on the length of the panel the conveyor feeds it. Can I use a DC motor and control with a PWM instead? I don't need feedback from the stepper for position. Wouldn't that be a...
  8. roshane87

    Motors for Stacker System

    Hello, I'm a mechanical engineer with limited electrical engineering knowledge so please excuse me if I sound naive. I have a conveyor running with a variable speed drive and I have 3 stackers (as per picture) below them that need to extend based on a signal from a sensor independent of each...
  9. roshane87

    Pivoting table top lifting mechanism

    Hi desertfox, ideally the 18m needs to pivot as one unit. dhengr, I have drawn in a screw jack mechanism with a common shaft. The pivoting end will be hinged. I was looking for different solutions/ideas to my one of using a screw jack which might be more effective and cost less. RN
  10. roshane87

    Pivoting table top lifting mechanism

    Thanks for pointing that out desertfox. Saved me a lot of blushes later if I considered that as the radius. Does anyone have any alternate ways of achieving this though? RN
  11. roshane87

    Pivoting table top lifting mechanism

    Good Day to you all and thank you for your replies, Using Hydraulics is not an option. As I mentioned before, it cannot be powered in any form and also Hydraulics would not be very suitable due to the mess it can make if a hose bursts for instance. As JBoggs mentioned, there are many ways to...
  12. roshane87

    Pivoting table top lifting mechanism

    Good Day to you all, I have a project where I have to convert a table which is currently fixed with the top at about a 25 degree angle with the horizontal to one which can be flat or 25 degrees. I'm still at the early stages of design and don't know the exact weight of the top but it's about...
  13. roshane87

    Bolt Shear stress on Pipe on shaft

    Hello, I was wondering how to calculate if an M10 bolt can handle 400Nm of torque without shearing if its used to bolt a pipe on to a shaft which is connected to the gearbox? Please find attached pics for reference. Thank you so much. Ross RN
  14. roshane87

    Molded Linkage

    Thanks for those tips. The reason I cut away the centre from the distal end was to hopefully save a bit of material and to aid faster cooling times. But since that's worked against the stiffness of the part, what I've decided to do is make it to the external shape as the old one, beef the I...
  15. roshane87

    Molded Linkage

    Hi Guys Thanks for the replies. We 3D Printed the new model to make sure all the dimensions were okay to create a new mold and also to see where we could save material. The parts we were getting were from a mold that was over 30 years old and was flogged out. Yes I'll be talking to my...
  16. roshane87

    Molded Linkage

    Hey Guys, Not sure if this is the best forum to ask this question but if you can give me a few tips it would be awesome. So below is the original linkage part we used which was made out of glass filled nylon. Very rigid and works like a treat but uses a lot of material and takes long to cool...
  17. roshane87

    HELP NEEDED URGENT ...HELP US SOLVE A ISSUE REGARDING ELECTRO MECHANICAL DOOR LATCH

    A bit late coming to the party but usually how we've done this in the past is having the PC "talk" to an interface (intermediate) PCB which sends a signal (pulse) to the latch. Of course this would mean having to create a PCB or finding an equivalent already available. You can also talk to a...
  18. roshane87

    Floating seat Ball Valves - Low pressure air

    Bcd I agree with you. Thing is the client hasn't still done laboratory tests to confirm what the black stuff is, I'm pretty sure its the ball being polished by the seat. I did some reading on Class VI valves which this falls to and they usually are rated to leak around 0.15ml/min at 3.44bar dP...
  19. roshane87

    Floating seat Ball Valves - Low pressure air

    Thanks for the replies guys. Been hunting down pictures to post here, hence the slight delay in responding. This is not where I work but for one of our main clients who we are trying to help out. Regarding the actuator, what I meant was the valves get harder to turn with use and the actuator...
  20. roshane87

    Future of Automation

    For a high volume product, automation is the answer. Been developing automated industrial machinery for around 3 years now and I feel one of the reasons why companies go with automation is to avoid operator errors and OH&S claims. Automation results in less operator interaction. Operators love...

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