I have the generic digital scales, with the simple display, mounted on my RF 45 type mill.
If I mount a dial indicator on the mill and move the table in the x or y directions and check the movement with the indicator I get a bit of a discrepancy, maybe a couple of thou up to .005" and even .010" after a while.
Today I put in a wiggler, the type with the ball on the end of a shaft, and ran it into a parallel mounted in the vise, zeroed it and then ran it back and forth several inches, jogging it in both directions so there would be lots of backlash added into the movement, and back into the parallel again. I repeated this 5 or 6 times in the x and y directions and every time I got a 0.000 reading against the parallel.
These scales are suppose to be accurate to .001" which is good enough for my shop, mostly.
Now dial indicators are comparators and not really meant for measuring because they can hang up a bit when the plunger is returning to rest so there could be some error there and a bit of tangential error in the way it is mounted.
So which is right the scales or the indicator or is there something wrong with my methodology in checking this out. It would seem to me that if it returns to the same place with the same readings the scales should be right. :
If I mount a dial indicator on the mill and move the table in the x or y directions and check the movement with the indicator I get a bit of a discrepancy, maybe a couple of thou up to .005" and even .010" after a while.
Today I put in a wiggler, the type with the ball on the end of a shaft, and ran it into a parallel mounted in the vise, zeroed it and then ran it back and forth several inches, jogging it in both directions so there would be lots of backlash added into the movement, and back into the parallel again. I repeated this 5 or 6 times in the x and y directions and every time I got a 0.000 reading against the parallel.
These scales are suppose to be accurate to .001" which is good enough for my shop, mostly.
Now dial indicators are comparators and not really meant for measuring because they can hang up a bit when the plunger is returning to rest so there could be some error there and a bit of tangential error in the way it is mounted.
So which is right the scales or the indicator or is there something wrong with my methodology in checking this out. It would seem to me that if it returns to the same place with the same readings the scales should be right. :
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