Cheapo Leadscrew with minimum accuracy requirement!

[irving2008]

Well Vikash that will work, depends on the speed you require and what levels of vibration you can withstand. What is your actual requirement?

[Vikash]

It's for Videography, so smooth motion is imperative. I'll be mounting HD video camera with a pan/tilt fluid head which means there will potentially be some other forces at play during movement. No need for a stepper motor with precise control, just something that allows variable speed of movement ranging from very slow to perhaps ~5cm per second at the top end.

At the moment I'm using a manual push system using a ball bushing carriage on an extruded aluminium extrusion - this doesn't lend itself to consistent, repeatable results.

Perhaps I should try some SS rod from B&Q as a sort of proof of concept, but I assume 10 or 12mm trapezoidal leadscrew and nut would give far superior motion in terms of smoothness. Even a ballscrew is not out of discussion, although I'd prefer spending as little as possible for the results I'm after.

V

[GeorgeD]

Got a feeling that gear&rack will be the smoothest for this along with speed and slow tracking into the bargain.

The rackis the dearest component but willbe a lot better choice for me over leadscrew.