Originally Posted by
Rickey_H
Folks,
Allow me to preface this question with my situation. A few years ago, I started building a CNC Router table. It started out as a modest design with a 4'x4' table using a low-cost Delrin wheels straddling on a V-track linear rail. When the table was completed, I noticed that it had excessive amount of pliability. I tried to quantitate it by using a series of spring scales and a run-out gauge. I eventually upgraded the bearings on my X-axis with more expensive MGN15H bearings and rails. This stiffened my spindle considerably to the point where I needed a larger scale, as it exceeded 30 Newton limit with no noticeable reading of run-out. I am now in the process of replacing my Y-axis with the same type of bearings which will make this system increasingly stiff. When done, I may still need to replace the linear bearings in the Z axis, but I want to wait, as this may have diminished returns on invest. This project has become much worse than any drug habit.
Instead of using quantitated custom measurements I devised, I was wondering if there is a simple benchmark that exploits the quality of the design that I could carve. For 3D printers they use something called a 'Benchy' which is a cartoon-looking boat (Think of Horatio Huffenpuff's boat on Beany and Cecile) that has subtle features difficult to print to perfection. The resulting flaws exploit latent problems with adjustments and such. Is there a benchmark for CNC routers that is widely accepted?
Thanks,
Rick