Moved the wrong pulley??
Originally Posted by
andrejculk
On the machine »Fadal 4020 VMC« there was constantly breaking the belt for the drive of the spindle, because the beltpulley of the engine and the beltpulley of the main spindle were not at the same hight; therefore the belts were not going on grooves. The belt also slipped lover many times for one notch on the beltpulley of the engine. For unknown reason the beltpulley of the engine was about 2.5 mm higher than the beltpulley on the spindle. That is why we removed the engine and pulled the beltpulley for 2.5 mm lover. Now, after another placing the beltpulley of the engine is at the same level as the beltpulley of the spindle. Belts are replaced, new. Because the beltpulley is displaced for 2.5 mm lower, I also had to displace the shield 2.5 mm lower of the engine. Is the problem in new belt, which are not »original fadal«?
Andrejculk,
Is this machine new to you or have you had it for some time? It does not make any sense that the belt pulley is higher on the motor, than the spindle pulley, unless at some point the machine stalled or crashed. This could have spun the spindle pulley and possibly moved it downward on the spindle shaft. I would not have lowered the motor pulley. Instead, I would have raised the spindle pulley (may have to heat it, it's a press fit) and re-aligned that pulley so that the tool changer (orientation) will work properly. Clean "and I mean clean" the idler pulleys for low and high gear, and make sure that the high and low idler cylinders are not restricted from full movement. The proper belt height should be centered on the idler pulleys. Put on a new set of belts and and should be good to go. If you have never worked on these machines, I would strongly recommend that you call in a fadal technician to do this. You don't want to mess this up any worse than it may be already!!(chair)
Just a good ol' boy, never meanin' no harm.
Joe