Alignment on Cylinder Part

[cumminsdesiel]

How would you do an manual alignment on a cylinder part? Thanks


Kenn Rhodes
PC-DMIS 3.5 R2

[AJHVW93]

How would you do an manual alignment on a cylinder part? Thanks


Kenn Rhodes
PC-DMIS 3.5 R2

More detail please , how is the part sitting what are the datums on the print?

[bw_bob]

You could measure 3 seperate diameters and construct a cylinder & thern level that cylinder. Make sure your in the right working plane z+,x+,y+..ect

[cumminsdesiel]

Here is a picture

Here is a picture of the part and its on the CMM with the flange up as seen in the picture.
Kenn

[#2#]

For a manual alignment assuming that the cylinder is oriented such that its axis points ±z...

I'd take one hit on the top as close to the center as possible. I'd then make this point the x,y,z orgin.

Then, I'd go dcc and measure another point for Z orgin and then measure the cylinder as a cylinder. Level the cylinder to z-plus or z-minus set it as the x,y orgin and the point as the z orgin. Then I'd do that all over again.

I hate taking more manual hits than I have to.

[bw_bob]

For a manual alignment assuming that the cylinder is oriented such that its axis points ±z...

I'd take one hit on the top as close to the center as possible. I'd then make this point the x,y,z orgin.

Then, I'd go dcc and measure another point for Z orgin and then measure the cylinder as a cylinder. Level the cylinder to z-plus or z-minus set it as the x,y orgin and the point as the z orgin. Then I'd do that all over again.

I hate taking more manual hits than I have to.

You got that right. Readpoint at top in center of cylinder, set as xyz orgin & go straight into dcc

[rangerboat72]

You got that right. Readpoint at top in center of cylinder, set as xyz orgin & go straight into dcc

I love the "readpoint" function. I'd just like to add that you may want to insert a comment to tell the operator to place it in the center near the top or whatever (pause) before the readpoint just to keep it from zero-ing before you want it to.

[bw_bob]

I love the "readpoint" function. I'd just like to add that you may want to insert a comment to tell the operator to place it in the center near the top or whatever (pause) before the readpoint just to keep it from zero-ing before you want it to.

Been using readpoints for years & I still forget to add that darn comment line on where you need to stick the probe...

[#2#]

I love the "readpoint" function. I'd just like to add that you may want to insert a comment to tell the operator to place it in the center near the top or whatever (pause) before the readpoint just to keep it from zero-ing before you want it to.

That is why I prefer the manual hit over a readpoint. If I say "position the probe over the top center of the part and close to the part" I have no doubt that it will be positioned 1" above the part at some point.

Readpoints are very useful for an initial clearplane type move if you don't want to actually use a clearplane.

[#2#]

Been using readpoints for years & I still forget to add that darn comment line on where you need to stick the probe...

I have a 'template' program that has all that beginning kind of stuff in there. When I need to write a new program, I open the template program, do a save-as and run from there. The template is also marked as read-only so I don't accidentally forget the save-as part.

[John Kingston]

I still forget where you need to stick the probe...

Your wife and / or girlfriends probably have a problem with that!

[rangerboat72]

That is why I prefer the manual hit over a readpoint. If I say "position the probe over the top center of the part and close to the part" I have no doubt that it will be positioned 1" above the part at some point.

Readpoints are very useful for an initial clearplane type move if you don't want to actually use a clearplane.

I just start the program with a VERY LARGE PREHIT & RETRACT for the first couple of measurements, translate to them and then tighten up the prhit & retract for the remaining measurements including a good alignment.