 Hi | |
Hi
Pat -
I really Admire your Technique about using a DTI probe.
But I am using a Lever type Dial Indicator & I relate problems in the Thread regarding the Lever Type Mechanism.
I have attached a Pic of Lever Type Dial Indicator.
Also Pat the Tag “Alternative to Spindle Probes”, is only mentioned because I used the Same pattern of Centre Finding. I don’t compare the Cost. What I suggested is a Zero Investment Plan.
I scare that u are not understanding me correctly. Also Your comments about to achieve the True centre of the Hole needs Retakes is what I Disagree.
As per my predication, we should be able to calculate the Centre within 5 to 8 microns & that too in the First Take itself. I refer to a hole very accurate in Ovality dimension. Generally we ream the hole which has an accuracy of 10 to 15 microns, but just for Instance if u try to align a Hole/Boss which is a Masterpiece, I bet we can achieve great accuracy, provided we Filter out the Previously mentioned Error.
Superman –
Your conception is very natural, but it is a Prejudice.
I was of your perpesective when this Idea Striked my Brain. To revalidate it I sketched a Geometry in CAD software. Please Refer attachment for further clarification.
Also to narrate you 1 story, when I used to work in a Public Limited Company. We had 3 machines & they used to make money day & Night. When I joined, it was a shock for me to believe that Operators used to switch off the machines (in night shift) because they were not able to Find the centre of Hole.
As in Night shift, mostly u don’t have a Managerial control so they had such freedom. At the Grass Root Level, operators are unskilled, uneducated & also we cannot expect them to be robotic in nature the whole shift. The clever way is “Filter the Process, so it is Beneficial to them as well as For us.
In ISO Standard & Environment, “Improve Process Capability “is the Correct Word for all these Issues.
To increase the Gravity of my Point, just Imagine that u have pyramid sort of profile mounted on Plate having 2 holes . As we all know, its not only Hole Alignment but also we have Inline Alignment. The worst case in this scenario is that the operator has to tram the Spindle Up-Side-Down on either sides to check the Inline alignment First & after achieving that , u turn to Hole Alignment.
I don’t criticize the Operator Tendency for Delay. Its Very Natural.
If I would have been In his place, I would behave the same way, they do. No owner can expect a employee to be 100 percent efficient the whole day.
“Human is Not A ROBOT”.
sinha nsit –
Hi,
Thanks for you appreciation for the Technique.
I know that Dialing the Dial Tip’s Side to the T slot is very Time Consuming
Can u suggest some other method of Filtering the Angle Error?
As u suggested, we should not take retakes for Computing the centre of Holes. If we endeavour to replace the Old method, we have to achieve Good Accuracy & also Reduce Time.
“Any new Technique runs successfully only when it walks on wheels of Good Accuracy & Reduced Time”.
The Tool Holder in which we clamp the dial (at correct angular position ) can be kept undisturbed or booked. I clarify it that it is not a Investment of Tool Holder but it’s a Booked. No one in the shop floor should remove that Dial, so whenever a new setting is there, just plug the Tool holder & derive centre in fractions of Time.
Also we Consume so much time aligning every Part, so Can’t we spare some time Once for Aligning the Dial to the correct position?.
Charlie Gary –
Hi,
Its nothing Depends on the Hole Size. As attached a Snap of Dial Indicators, u can Pickup Hole/Boss of any size by this Indicator.
Well as I told you before, human is not a robot. Some can find centre within seconds, some takes holes.
Also humans/operator gives up Sometime. Sometimes, operators are tried, they are frustrated because they are consuming more time than regularly required, the employee is shouting at him, he is physically present on the machine but he is thinking of some Personal Problems & the list continues to go on & on……………
Well I don’t want to express the Accuracy of Setup when the operators has so many things to deal. We all are humans & Not Robots.
Hope I clarified the Gravity of My Point & gave branches to Technical Discussion.
Thanks all for your time, Patience & Support.
Ashish B |