Circular Move Band

[Wingman]

Anybody know what controls the bandwidth of circular move? How can I affect it?

[#2#]

Not sure what you mean by "bandwidth".

[John Kingston]

Isn't it set by your prehit/retract distance?
I'm not at work so I can't check.

By bandwith, you do mean how far away from the feature the probe is during a circular move, right?

[bw_bob]

There is a box in auto circle that you check called circ move

[Wingman]

I want to control how close and how far away (or how close) the probe movement is allowed in a circular move. I was thinking it was prehit and retract but I wan't sure in PC DMIS.

Bob, two examples:
1) I check a post / stud and have all kinds of clearance so I make the circular move band large for fast moves.
2) I check a Diameter inside a groove and I want the circular move bandwith to be small so I can navigate the groove.

I have been using vector points and clear surf for this sort of thing as I wasn't sure how to control it with PC DMIS.

[bw_bob]

The circ move means just that. When checking the dia it moves circular. The prehit /retract means just what it says. Sometimes you have to do radial points because of constraint or odd shaped diameters....limitations

Not sure what to tell ya.

[Underspec]

Two ways:

1- Prehit and Retract values affect this.

If your controller does not support smooth circular moves you will have to adjust the #of points and/or prethit and retract values.

2- Adjust the nomimal diameter.

[Wingman]

Isn't it set by your prehit/retract distance?
I'm not at work so I can't check.

By bandwith, you do mean how far away from the feature the probe is during a circular move, right?

Right. That is what I want to control.

[craiger_ny]

I want to control how close and how far away (or how close) the probe movement is allowed in a circular move. I was thinking it was prehit and retract but I wan't sure in PC DMIS.

Bob, two examples:
1) I check a post / stud and have all kinds of clearance so I make the circular move band large for fast moves.
2) I check a Diameter inside a groove and I want the circular move bandwith to be small so I can navigate the groove.

I have been using vector points and clear surf for this sort of thing as I wasn't sure how to control it with PC DMIS.

Prehit and retract dictates. I have to check diameters in trepan grooves and find sometimes I have to run as low as 0.05 prehit and retract. That is what you are looking for.

[Wingman]

Two ways:

1- Prehit and Retract values affect this.

If your controller does not support smooth circular moves you will have to adjust the #of points and/or prethit and retract values.

2- Adjust the nomimal diameter.

I get 'straight shot' stop 'straight shot' type circular moves. During the 'straight shot' portion of the move the probe goes from MAX distance to MIN Distance to MAX Distance in proximity to the surface. Hopefully I said that right and it makes sense.

I will attach a simple pic.

[Wingman]

Prehit and retract dictates. I have to check diameters in trepan grooves and find sometimes I have to run as low as 0.05 prehit and retract. That is what you are looking for.

OK. Thanks everybody. Even you Craiger! j/k

[John Kingston]

Prehit and retract dictates. I have to check diameters in trepan grooves and find sometimes I have to run as low as 0.05 prehit and retract. That is what you are looking for.

That's what I thought

OK. Thanks everybody. Even you Craiger! j/k

Somebody get me a beer!

[#2#]

I get 'straight shot' stop 'straight shot' type circular moves. During the 'straight shot' portion of the move the probe goes from MAX distance to MIN Distance to MAX Distance in proximity to the surface. Hopefully I said that right and it makes sense.

I will attach a simple pic.

Your drawing indicates that you do not have circular moves either turned on or your controller for some reason doesn't support them.

A good way to see if they are working is to measure a large ID and use only 3 hits. Then it becomes very obvious that it is moving in a circle between hits.

[Wingman]

Your drawing indicates that you do not have circular moves either turned on or your controller for some reason doesn't support them.

A good way to see if they are working is to measure a large ID and use only 3 hits. Then it becomes very obvious that it is moving in a circle between hits.

It does move circular. Imagine only three hits on the drawing with several 'circular' stops along the way

[#2#]

It does move circular. Imagine only three hits on the drawing with several 'circular' stops along the way

Ah, ok, I thought that the each intersection of your lines was a hit.