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Upper Management is looking for answers/Justification on probe breakage

SMace
Hello ALL GURU's:
Here's a great post for a lot of input on WWGD (What would Gurus Do)?
Lets start by saying there are NOT an excessive amount of probes being broken yearly. I would estimate less that $500.00 - $700.00 yearly max, if that.
However, The uppers want justification.
Now, it has been suggested to slow the rapid in the machine settings, which would cause more cycle time on check parts that are in a Pallet setting.
There is a CRASH attachment from Renishaw. Anyone currently use these?. And do they work. Say on a .7x20mm probe or a 1mmx27mm probe?.
In our shop, we have 4 Cmm's that all have touch probes and 2 have vision as well. What would a normal (realistic) probe consumption be expected
at your place?. Mind you that the specific probes that we have in question are 1.5x30mm. 1mmx27.5 and .7x20mm. Sometimes it may just be human error (can't help that).
Maybe a slight misload, part has been machined or molded not into spec. Other times, maybe doing a manual align and you forget the rapid is on and "Snap". It happens.
I was asked to figure the FORCE in which a probe breaks. Well, honestly what other factors go into that one?. Are you rapiding, your prehit/retract too close and you touch the part and snap?.
Seeing as we are a high volume molding/machine shop with multiple parts at any given time to inspect via DCC. What is the best course of action to go ZERO probe breakage a year?.
This would not include Set ups, Prove Outs as well.
I am just looking for some insight on this issue from a lot of people who know way more than me!. Hence, picking the brains of the Guru's. ANY input would be greatly appreciated and if you want to keep it short and sweet. great. I don't want to consume too much of your time writing.
Thank You All Slight smile

  • in reply to DAN_M
    I agree. My programs started out sow to take the 1st couple hits to make sre the part was put in the fixture correctly. Then followed by a prompt to continue at which it would go back to 100% speed. Definitely saw a down-word trend in broken CMMs.
  • my 0.5mm probes break if I look at them wrong.

    At the beginning of my programs I have speed turned down to 30% absolute. After the first few hits, there is a prompt to continue. This alone has reduced broken probes. Otherwise with the turn over in our shop, it's almost impossible as they keep sticking new people at the mercy of the machine on off shifts. Luckily I got paid an automatic 2 hours when called in. Whether it took me 10 minutes to fix or and hour.
  • in reply to markoor99
    my 0.3X10mm & 0.5X20mm probes have been alive for over 2yrs =)

    -probe rack
    -operator never touches probes by hand
    -movespeed is wicked slow until prg is fully approved & collision detection passes
  • in reply to markoor99
    i broke 2 in the last month. Only because my probe body is started to malfunction. Otherwise I'm pretty good at being cautious with those tiny probes.
  • Hello ALL GURU's:
    Here's a great post for a lot of input on WWGD (What would Gurus Do)?
    Lets start by saying there are NOT an excessive amount of probes being broken yearly. I would estimate less that $500.00 - $700.00 yearly max, if that.
    However, The uppers want justification.
    Now, it has been suggested to slow the rapid in the machine settings, which would cause more cycle time on check parts that are in a Pallet setting.
    There is a CRASH attachment from Renishaw. Anyone currently use these?. And do they work. Say on a .7x20mm probe or a 1mmx27mm probe?.
    In our shop, we have 4 Cmm's that all have touch probes and 2 have vision as well. What would a normal (realistic) probe consumption be expected
    at your place?. Mind you that the specific probes that we have in question are 1.5x30mm. 1mmx27.5 and .7x20mm. Sometimes it may just be human error (can't help that).
    Maybe a slight misload, part has been machined or molded not into spec. Other times, maybe doing a manual align and you forget the rapid is on and "Snap". It happens.
    I was asked to figure the FORCE in which a probe breaks. Well, honestly what other factors go into that one?. Are you rapiding, your prehit/retract too close and you touch the part and snap?.
    Seeing as we are a high volume molding/machine shop with multiple parts at any given time to inspect via DCC. What is the best course of action to go ZERO probe breakage a year?.
    This would not include Set ups, Prove Outs as well.
    I am just looking for some insight on this issue from a lot of people who know way more than me!. Hence, picking the brains of the Guru's. ANY input would be greatly appreciated and if you want to keep it short and sweet. great. I don't want to consume too much of your time writing.
    Thank You All Slight smile



    I am not sure how many touches a tip could last. But I believe a replacement log could help you out. For example which CMM when what happened. The upper management wants accountable only.
  • I don't have much else to add to what the others have already said here. However, I will echo the tremendous reduction in broken probes/programs going awry after turning on OPERATOR mode. It's been an absolute god-send, and I'm an atheist. Just make sure the programs are fully vetted prior to letting an operator run it.
  • in reply to DAN_M
    sounds like you're on the right track!
  • Back then I remember taking a 0.3mm at my hand fresh out of the box. First one to ever use... slipped from my hand right of and just like that, hundred (or hundreds?!) of Euro went down the toilet :P Still gives me nightmares lol
  • in reply to louisd
    That is a fantastic sheet. Thank you. Going to have to "Borrow" it. Slight smile
  • GREAT INPUT GURU's!!!
    Thanks a million again!!!
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