Recent content by Tekneek

94.86 is the force from a pulley. Also, wouldn't the bottom diagram be the one with correction bearing reaction since I got negative values for the reactions (Raz and Rbz) when i solved them?

So I plugged some numbers into get the forces and also added a force from drive pulley. Does my calculations for the reactions at the bearing look correct? Thanks.

So if I want to calculate the reactions on the bearings should I just keep the negative, not changed the direction of my arrows and proceed with the calculations?

I was confused about this example from a book. After putting in some numbers I got the forces circled in green and blue to be negative. Does this mean the directions for the forces shown is incorrect, and so I should switch the directions before calculating the reaction forces in the bearings (x...

But how would I choose the spindle diameter? I understand that I can change the pulley diameters to get the desired rpm for the spindle. But wouldn't the inner diameter of the pulley depend on how big or small the spindle shaft diameter is?

The system is similar to above. Say I have calculated the required power at the spindle and various speeds (rpm) the spindle needs to run at. I am not sure on how to choose the constant speed of the counter shaft. For the motor HP i am thinking it is just Pmotor = Pspindle/Efficiency. Also not...

Not exactly sure. If you could link me to something I could look up that would be helpful.

Sorry, that was my fault. ∑Mo = 0 = -Ra(x) -Rb (x-3) + F(x-1) + M = 0 (3) M = Ra(x) + Rb(x-3) - F(x-1) Using singularity function dy/dx = 1/EI [ (Ra(x-0)^2 )/2 + (Rb(x-3)^2)/2 - (F(x-1)^2)/2 + C1 ] y(x) = 1/EI [ (Ra(x-0)^3 )/6 + (Rb(x-3)^3)/6 - (F(x-1)^3)/6 + C1x + C2 ] Applying Boundary...

A shaft of diameter 10 inch is supported by 3 ball bearings. An external force (F, given) from pulley (diameter not given) also acts on the shaft. The supports are subjected to bending load (moment and transverse shear) and torsion load due to pulley. Yield Stress at Tension given. Assume no...

Given w =1, What is phiG ? Is it the phase difference between the two waves? If it is, isn't it simply phiG = (delta t/T)*360 but I am not getting the right answer. PhiG = (0.5/2pi)*360 = 28.6 Also I don't know where this wt + phi = 2pi equation comes from.

How does start of injection effected by speed of the engine? According to data, it seems for higher engine speed, the SOI (in terms of degree BTC) is higher.

What does it mean by root-curve on the real axis? Also how would I know the root locus moves in a circular pattern?

The characteristic equation is 1+K(S+1)/S2 Below is the root locus diagram. I don't get why there are two branches when there is only one pole, at 0. Does it count as having two poles even if it is the same because of s^2 ? If it does then why doesn't the angle of departure make sense? number...

For that formula it would be -1/2. I was thinking it would be infinity because you really can't put down a number with it unless maybe it is 1? EDIT: Nvm go it. It ends up being -35/40. Thnx

-s/4, if s =0 then Would't the limit be zero?