Recent content by Baluncore

@rajava007 Can you please check that when you turn the input on your model, the output is locked to turn at the same rate.

T I thought the OP built the pictured model to gain experience and demonstrate that was not the case. Your kitty corner analysis is only correct for the case where the input and output angular velocities are the same. That symmetry is the first example at the bottom of my code block. Then...

I do not believe that your assumption is the case. Consider what happens when they do not rotate at the same rate. given input and output RPM x = input RPM y = output RPM solve for internal shaft RPMs a, b, c, d, defined as x = a + b input differential c = a / 2 slow gear path d = b * 2...

@Nick09 The bearings you have referenced are not specified to be self-aligning. Self-aligning ball bearings have a spherical outer race, but are more difficult to seal, and more expensive than deep groove ball bearings. The blocks shown have no external grease nipple, just a screw to clamp the...

RF instruments are generally manufactured to have an input impedance of 50 ohms, so they can be connected to other RF modules through standard 50 ohm cable. The output driver of a TDR or VNA, is usually a low impedance, approximately 2 volt signal, that is series terminated through a 50 ohm...

Each "bounce" is a scattering event that splits the energy two ways, in proportion to the transmission and reflection coefficient at each impedance transition. The signal will be attenuated progressively, so multiple scatterings quickly become an insignificant part of the record. Transmission...

Roller chain sprockets have a limit of about 12 teeth. Below 12, the sprocket begins to sound clunky, and wears rapidly.

@Nick09 You set the working height by pushing a pin through one hole in the black box, that passes through one of many holes, (spaced 1U), in the silver post. You could cut fewer holes in the silver post if you had two holes in the black box. To use that vernier system, delete every second...

I see no reason why it cannot be manual, just like a steam railway engine out of a roundhouse, on a turntable. https://en.wikipedia.org/wiki/Railway_roundhouse You will need another factor of ten gear reduction, with a right angle gearbox. You may need to link the two supporting rollers at one...

I think there are possibilities for such a configuration, but that it is too complex for an untrained brain to model immediately as a thought experiment. I get a feeling that complexity here leads easily to circularity, then to delusion, in the same way that a PMM is conceived. There are...

Welcome to PF. Torque is needed for two separate reasons. One is to overcome the 3.25 mm eccentricity of the mounted beam, the other is the acceleration or deceleration needed to start or stop the beam rotating. When the column is rotated, what angle will it rotate through, and how much time...

Welcome to PF. Can you please name the input, control and output shafts.

I wrote some code some time ago that while computing numbers, also tracked dimensions. It was able to identify the units and flag errors. This was the table I used to identify units and terms. Length, m, metre | Mass, kg | | Time, s, second | | | Current, A, ampere | | | |...

When the three TLs have the same impedance they look like a single line. Although you can plot V(left) and V(right), there can be no reflection at those nodes because they are matched. At V(left) and V(right) you are watching the step move towards the termination, then later, the reflection...

The network is drawn across the top. The TDR plot is down the LHS, showing how multiple transmissions and reflections sum.