I had to delete my earlier post as I could not come across the appropriate thread to post my query.
I seek your advice in designing a home made lat pulldown machine (with low pulley) which can lift upto 150 kilograms of weight plates. I intend to use 2 inch by 2 inch square rods (unless you guys feel otherwise) and the maximum height of the maximum should be 6 feet i.e. 72 inches. Draft 2D diagrams are attached for your reference.
I wanted to understand during execution of LPD exercise, when the weight comes of the ground and the center of gravity moving up, is there any chance that the machine may shiver or topple down? What may be possible ways to prevent that (considering that I do not intend to use a fixed base i.e. fastened to the ground by screws or make the base unnecessarily heavy using stone filled rods / heavier rods).
I seek your step by step guidance and other suggestions if possible.