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The screw is on the right, and turns the other screw via two 90deg gearboxes and a driveshaft under the lift area. The lift nut is no...

Could you post one or more pictures of the mechanical part of the lift? Perhaps we can spot a source of high frictional loss.

Appreciate the reply and i will check out the links you supplied. Thanks for your help and insight.

Based on the previous posts, it can also be shown that A+B+C=D for the angles A, B, C, and D in the next picture. Or A+B+C+D=E for...

The solution below is not mine – I saw it on YouTube, here. This is just my summary. 1. Add 3 squares and consider the triangle...

Could you post a picture of the whole assembly, including the structure that supports the bearings, please?

Heat transfer = Flow of energy through a material (as conduction). Temperature difference (or delta T) = It induces thermal energy flow...

With the diffraction grating ('grid') like this: - to which axis of rotation (x, y or z) do you think part a) refers ? - to which axis...

Just another approach:

Here are some more solutions; In each case, the triangle constructed in green is similar to the triangle highlighted in brown which...

BBC News once posted a challenging geometry problem from a Chinese maths exam taken aged 16, comparing it to the British exams taken at...

The drop of the slab releases potential energy which enhances kinetic energy. The perpendicular component of the slab displacement...

A slab rests on two massless rollers of different radii such that the angle of the slab's inclination is ##\alpha##. There is no...