Recent content by billinr

Hello All I am trying to work through a belt drive design and I am confused with a simple concept. I have a two stage system that has a max torque input of 110N. I want to treat this as "worst case", so I assume that all of the torque is used at the final output flywheel. The first...

Thank you very much for the help. Your formulas worked to complete my spreadsheet. I really appreciate your assistance.

I should have included an example... Circle 1 has a diameter of 21 Circle 2 has a diameter of 106.7 Center distance is 152.2 Thanks

I am trying to write an Excel template which will chart two circles and their external tangent lines - similar to a belt and two pulley system. I have the formulas to calculate and chart the circles. I am looking for a formula to calculate the tangent points between the circles, given the...

SystemTheory Thank you for the reply. This is making a bit more sense.

I would like to ask if anyone could explain how torque is consumed through a reduction ratio - in this case pulleys on a common shaft. I have a three shaft system, joined by belts. The motor pulley is 25.4mm, turning at 100 rpm, with an available 1.4Nm torque. This is connected to the second...

Bob S. Thank you for all of that information! That will be a big help in finishing this design. While I really cannot speak to the motor design, I can see where all of that kinetic energy has to go somewhere... conversations I have had tell tales of self-destructing mounts, broken belts...

Perhaps I did not read you question correctly. The drum holds 90.6L of water. The remainder of the weight is clothing.

The drum axis is vertical. At max load (stated), drum is approximately 80% full.

Apologies for leaving out that piece of information. The drum diameter is 563mm. There are baffels within the drum, so I would probably increase the torque requirement (maybe 10%?). The drum and pulley share the same axis. Thank you

The issue I have is in a system design where I need to find the torque requirement to stop and reverse direction on a spinning cylinder of water (laundry wash machine). The system data I have: Homework Statement Water filled cylinder, 564mm diameter Given weight of load is 170lbs Spinning...

I have an application (clothes washer) which requires a drive design such that: The drum contains 170 lbs of water and clothes, spinning at 95 rpm. The drum spins at this speed for 1 second, then decelerates for 0.25 seconds and reverses direction. This process repeats for 30 minutes...

Thanks for the site - lots of good info there. I didn't see anything that would provide an answer as to why a rotating shaft would see lower loads than a stationary shaft. I realize the bearings will distribute the load - that isn't where my problem lies. I just need to nderstand the basic...

I am attempting to design a basic 3 axis system, where the motor to idler ratio is 3:1, and the idler to driven ratio is 1:2. The motor is 1.5 kW, variable speed. All three axis are in vertical alignment. This is a belt drive using a flat multi-vee belt. My problem is trying to explain the...