See attached.
The 1lb mass is on the top of the pylon. The pylon itself does have weight but only about 6 oz or so and evenly distributed over its length.
The 1lb mass acts somewhere behind the vertical pylon line but not very far - say 20mm or so. Hopefully you can see the details and there...
zekeman, many, many thanks. That's the data I was looking for. I will look at numerous positions across the traverse but as I suspected, the worst case position is when the arm is horizontal and you have provided what I need to make the calculations.
The drawings are very accurate in scale...
Handleman, you got it. The worm gear is mounted in the base of the pylon and creates a self-locking mechanism at each end of the rail. Still to be tested to see how well that works, but that is the plan. If this does not work, a locking mechanism will be introduced into the base of the pylon to...
Desertfox, yes, the motor is mounted in the plyon base as is the worm gear and drive sprockets. The motor movs with the pylon. The teeth for the sprocket are machined along the curved rail and are stationary - just like a curved rack and pinion where the rack is on the rail.
The software I have...
So, the mechanism is essentially a sliding, rotating lever arm and the maximum torque required, I believe is when the shuttle is to the far right and has to be moved to the far left. When the shuttle is to the far right, the full 18 mass on the end of the pylon is acting on the pins. If we...
This last picture is again a line drawing but gives more detail of the loads associated with the mechanism and also better details the structure of the pins, motor, mass and the two extreme positions of the...
This thid picture shows a line drawing representation of the mechanism at varying positions along the rail. Note the black circle represents the drive sprockets that are mounted to the base of the pylon or shuttle and motor drives the shaft that these sprockets are on.
So, in summary, the motor...
OK, so, I think the best way to start is with a visual of the mechanism.
Attached you will see two pictures of the mechanism without all of the ancilliary components. The best way to visualize this is that the base of the moving/rotating pylon (grey item) that is captured between a rail...
The mechanism is still in the CAD stage of design and I have not yet started the prototyping of it so a spare motor may not be of value yet.
Let me collect the pictures and post a description - maybe it isn't that difficult to calculate the torque requirements or at least, a magnitude I can...
Gentlemen, thank you.
Don, yes, I know, I am working this in reverse. The primary issue I have is that the mechanism being driven by this motor/worm gear system is, in my limited understanding of mechanical calculations, very complex and I am unable to calculate the torque required to run it...
Folks, apologies for this question but I have scanned web pages for several hours trying to find this data and can't.
Can someone help me understand the effective torque transmitted to a worm gear shaft that has a 30 tooth worm gear with 20 degree pitch angle, 7.12 degree lead angle, 18mm...
Folks, I just joined this forum and before you wonder, I am a EE by background rather than a ME as noted by the engineer type next to my handle - I misread the meaning of this selection when I registered on this forum.
I have a question related to guide pins. I have a mechanism in design for...
