Mr
"Why remove the springs?"
Ok, you have your plunge router mounted on the plate, drop it into the table and want to make a height adjustment. With one hand you release the plunge lever, with one hand you lift the router and the router plate and all come out of the table. Sure, you could hold the plate down with your forehead but that makes it difficult to see the adjustment. You could fasten the plate down but that defeats the entire purpose of having a plate. Even if you are smart and pop the router out of the table to make height adjustments the springs will fight you. Removing the springs is one of the "Keep it simpe" methods taught by the guys from the Router Workshop.
Richard, upward creep? Did you scold it and tell it to stay? :haha:
If your router is moving up you need to adjust the clamp or plunge lock. We don't want your router to fly away.
The spring provides an addition to gravity and was placed there by the manufacturer for a reason. On most routers it is to counteract gravity, ergo making its use unneeded when the plunge router goes into the most unnatural state of being inverted. I actually bought a third router to remove my Freud from this service as the spring was needed, but the removal of the spring would have made my life much easier; this model Freud is a great plunge router and a very bad table router. Some routers are meant to stay as there creators meant and not switch sides (in this case positions). My Freud, without the spring, would creep upward by a 1/32" over a 6 ft run when cutting a 1/4" slot in mahogany and a 1/16th when using clear pine.
Those of us that work in both wood and metals realize that these numbers may be fine for someone such as yourself, but when you sell commissioned works for five figures and habitually work with your Bridgeport and Clausing machines in the 0.00002 +/- an inch range (over the equivalent distance), then this is just sloppy workmanship. When you are advising a person to make a change that may or may not hurt the performance of the finished product, then you can only speak from personal experience. I will try to keep it simple for you - keep the spring then no harm, remove the spring and you do not know what will happen to him, you only know about your own situation. Ruin a $300.00 piece of mahogany because you removed a spring then know some things were designed that way for a reason. Read up on metrology and why it is important in the design of machines - your projects might benefit from it; after all it is only a router, what is important is the end result. A router is just one of many ways to achieve an action that is part of the sum of actions required to create a finished product.
Regards - Baker
ps - Removable router plates were originally designed so people could attach and remove routers more easily from tables, thus making greater use of a lesser number of machines. Originally tables did not have plates and many are sold today, usually cast iron, that have no provision for a plate.