mcmark
04-04-2014, 08:18 AM
Let me elaborate a little.
The machine is a 2007 PRSalpha 4x8 with a spindle.
If the z car is adjusted so that it is tight in the home position (all the way right on the y axis), the z car becomes loose (meaning I can shake it forward and backward a little) on the y axis about halfway, then it becomes tight again at the extreme left position.
I've checked the parallel of the v rails and they are dead on all the way across the beam. I originally thought that there might be a dip in one of v rails, but measuring across the upper and lower with calipers doesn't really show an issue. Now this is measuring tip to tip of the rails (not necessarily where the v rollers ride) and there could possibly be some wear to the rails I guess, but visually they don't really appear to be worn.
There isn't enough eccentricity in the lower v rollers to set them to be tight in the center of the machine. If there were more eccentricity I could probably just tighten it in the center and call it a day.
Any help is much appreciated
Thanks in advance,
Mark
The machine is a 2007 PRSalpha 4x8 with a spindle.
If the z car is adjusted so that it is tight in the home position (all the way right on the y axis), the z car becomes loose (meaning I can shake it forward and backward a little) on the y axis about halfway, then it becomes tight again at the extreme left position.
I've checked the parallel of the v rails and they are dead on all the way across the beam. I originally thought that there might be a dip in one of v rails, but measuring across the upper and lower with calipers doesn't really show an issue. Now this is measuring tip to tip of the rails (not necessarily where the v rollers ride) and there could possibly be some wear to the rails I guess, but visually they don't really appear to be worn.
There isn't enough eccentricity in the lower v rollers to set them to be tight in the center of the machine. If there were more eccentricity I could probably just tighten it in the center and call it a day.
Any help is much appreciated
Thanks in advance,
Mark