Apologies if this has already been discussed - I haven't seen anything in the forum that's directly relevant to this, considering the size of the camera I'm using. I'm looking to build a motion control camera slider for a Sony PXW-FS7. I want to build just the one axis, but may add a pan and/or tilt axes later on. This probably means I'm looking at smoothly moving a weight of around 5-7kg very smoothly at speeds of approx. 10cm/sec. Ideally I'd be using quiet steppers in case I want to film with sound, but it's not a deal breaker. I'd also like to consider the possibility of using the slider in a vertical configuration, which means a vertical lift of around 5kg - although for this configuration I could probably strip the camera down to around 3kg. I've been looking at a 150cm, 20x80mm V-Slot rail with Nema17 and the extreme solid v wheels. The 80mm width is chosen for the stability I'd hope it'd provide for the camera platform. In terms of the configuration, I'm thinking of using a belt driven unit, with the V-Slot rail in a "landscape " orientation - 80mm side flat to the ground. Then I'd be using the belt (not sure if it should be 2 or 3mm) to wrap around the center of the V-Slot rail and attach to an 80mm gantry plate. The idea here would be to reduce any sideways stresses on starting the movement of the gantry. I'm also thinking of driving the Nema17 with a Big Easydriver controlled by Arduino and programming the unit to accelerate the gantry, rather than just straight up to speed. I'd love to hear if there is any experience in making such a thing, or if there's any advice on the construction and parts.