Hello!
I operate on an Optiv Performance 1z443, a dual Vision/TTP system.
This particular unit comes (I believe standard) with a Rotary table, as described in the title.
For years, the company I work for didn't have a solid understanding of how to calibrate it; as they were the ones that trained me, neither did I.
Recently, I came across some information that was able to give me some clarity, and I thought I would share with the community.
Using the "canned" PC-DMIS calibration schtuff for the rotary, I dunno, for some reason I didn't find it adequate.
After some research, I discovered another method, involving Calibrate Rotary from Features...
Firstly, I drafted up a standard AutoCalibration program, to calibrate the Camera & All Tips.
I performed a File>Save As.. & created a separate AutoCalibration program, with the addition of the Rotary table steps, and, more importantly, an IGNOREROTAB/ON command at the top.
After the initial calibration of the tips, the program switches back to manual mode.
The operator is prompted to create a 4-point semi-circle on the outside of the rotary itself (which is blue in my case).
1 point is to be taken on the face, and the program moves to DCC mode.
Using DCC, a cylinder is drawn on the rotary, to establish a center for rotation. A simple point is used for the face of the rotary, but a plane can be substituted.
The next part is sort of "hacked together" honestly, but it works.
I don't know the exact nominal of where the sphere is "supposed" to be at 0°; instead I created an Auto Sphere at it's measured location, & measured it again with 17 points using the Master setting (to change the nominals to where it measured).
I then copied the sphere, set the workplane along the axis of the rotary (in my case, Y-) & Paste-With-Pattern'ed every 30°.
If you'd like, do it every 45, or heck, every 1; I don't need to rotate less than 30°, so I chose 30.
In between each sphere, I added a MOVE/ROTAB command to rotate to the desired angle.
Inserting some clearplanes & move points and what have you, it was allowed to DCC measure all of the spheres at their respective angles.
HERE'S WHERE YOU CALIBRATE THE ROTARY:
Create a plane from all of the spheres.
Level to this plane, parallel to the axis of the rotary (in my case, Y-)
Create a circle AFTER YOU ALIGN from all of the spheres
Insert>Calibrate>Rotary Table from Features
Use the Plane you levelled to, and the circle of the spheres.
Voila, it's calibrated.
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Hopefully this helps someone get their rotary going with more confidence.
I should note though, there are better processes for calibration, such as rotating to every desired angle, then rotating backwards to account for Hysterisis, & constructing a circle from that.
I just know I was never able to get PC-DMIS to effectively calibrate the rotary, or perhaps I never understood what it was doing, but this custom routine was able to get me going in a way I'm okay with.
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