Recent content by PizzaWizza

Ah. I see. That makes it clearer. Thanks

I was deducting ln 0.1 from ln 0.2, thanks

Struggling to understand how this answer works. This is just a worked example from a university paper. W = 220∫ V^-1 dV...between the limits of 0.1 & 0.2...(Answer is 152.49 Rad) I understand that the basic rule for a negative power would give us ln x, but from here I would say that the answer...

Thanks very much. Makes sense

Apologies, I've got my driver & driven the wrong way around. So driver gear rotates at 100rpm/min and has 80T and diameter of 160mm. The driven output shaft has 20T and a diameter of 40mm I can find the rotational speed of gear C working back from Gear D via T1ω1 = T2ω2 ∴ 20x400 = 50xω2 =...

Calculating the input power required for a drive gear in a train. I have 4 gears, all in line. The driver shaft A rotates at 100 revs/min and the gear has a diameter of 40mm. 20 teeth with a module of 2mm The output is to rotate at 400 revs/min and has a diameter of 160mm with 80 teeth and...

Thanks again Billy, I'll double check calcs

Can anyone explain why, if you increase the CoF of the belt on a V-Belt pulley system, you'd get less torque? I've increased my CoF in the V-Belt tension formula. You'd have thought that the torque would increase with a belt with a greater CoF?

Tolerances can be used to ensure parts mate correctly. For example, if you have a machined bore hole which is designed to accept a shaft through it, you could put a tolerance on both items. The Bore hole say 100mm diameter, you could put a tolerance on of your +0.02 +0.05. For the shaft, you...

I'm by no means an expert here at all but the only thing that jumps out to me is the position & force of the strike. Does that not need to be considered?

Sorry, I've misled you somewhat due to my own mis-information. I'm trying to find the power transmitted once the belt strength is halved. So I've found what power is transmitted in the initial question, I need to find what it'll be after halving the original 8kN Max ultimate strength. So, as...

Thanks Billy, One final note, once I've calculate my new value of F2 and apply it to P = Tw, am I also using the smaller pulley's rotational speed for this formula?

Ok, so following on from this, to calculate the max load on the second pulley when the ultimate strength of the belt is halved! If I use the V-Belt tension formula, using my new value (4kN) as F1, do I calculate for F2 using the larger angle of lap or the smaller? Large angle being the second...

Hey, I'm currently working on the same paper. If I calculate the Torque in the slack part of the belt (T2), using the angle of lap for the small pulley, would this be correct to calculate the power when using half of the ultimate strength of belt?

Thanks for feedback. That's pretty much the question to the next part.