I am having trouble performing the length check out on my Romer. I have not checked length using the bar in over a year. I recently replaced my 6mm ruby ball (they don't bounce well) and calibrated it with help from this forum. Since I had the bar out already, I installed the 15mm probe and started checking length. The conical seat distance (711.168+/-.040) came in for most of the points but never for all 5 checks. I have tried multiple times with no success. My setup consists of the bar sitting on my granite table, being held down with clay(I was told was sufficient). The arm is situated in the middle of the bar and I attempted many different articulations and also keeping the same position. I just can't seem to obtain an accurate read. The bar hasn't been called since 07' but has only been used one other time and has been sitting on a shelf for the last year. Here are some of the results:
I re-calibrated the ball using a sphere that is on our Cordax. With the 15mm tip, Standard Deviation is (.004) and Max Error is (.008). The first length check looked promising but then they took a turn for the worse. The sphere is a (.75005") 19.05127mm.
1st Attempt I articulated the arm at different angles.
2nd, the arm was straight down but at a slight angle for all hits.
3rd, the arm was down in front of the machine, arm 90 to the right, then the left.
4th, the arm was angled outward so that the elbow was pointed out away from the Romer.
5th, I articulated the arm in multiple ways.
I did not push the tip into the cup, just gently placed it and still I cannot get consistant readings.
I re-calibrated the ball using a sphere that is on our Cordax. With the 15mm tip, Standard Deviation is (.004) and Max Error is (.008). The first length check looked promising but then they took a turn for the worse. The sphere is a (.75005") 19.05127mm.
1st Attempt I articulated the arm at different angles.
2nd, the arm was straight down but at a slight angle for all hits.
3rd, the arm was down in front of the machine, arm 90 to the right, then the left.
4th, the arm was angled outward so that the elbow was pointed out away from the Romer.
5th, I articulated the arm in multiple ways.
I did not push the tip into the cup, just gently placed it and still I cannot get consistant readings.
