/r/Metrology
News and discussion related to the science of measurement and calibration.
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I'm curious how you guys handle the reporting of in-process inspections? Do you keep track of it with QMS software or just an excel sheet? How do you determine the frequency at which these inspections should take place? At our company, only certain dimensions are checked every 10 parts, but others are checked every part. Most of the hard gauging is used to inspect every part, but i think it's a huge waste of time to record the results of every single hard gauge check. On the other hand, we do need evidence that the machinist is doing the inspections properly. We also check these same parts on the CMM and Form machine. Idk how to incorporate all of these into a single inspection sheet that doesn't get overwhelming to the machinists. I'm fairly new to the field of Metrology and Quality, so please forgive my rookie questions, but I've been asked by upper management to improve our in-process inspection and the recording of the results. Any advice is greatly appreciated!
Hello all, I’ve been in metrology for just 2 years. I know I’m very new to this field, but I feel like my knowledge has grown a lot in (trying to) understanding it all. I want to eventually take the CCT exam. Is there any good resources to help me get to the point I’m ready to take it? I thought about taking the ASQ CCT prep material and also the question pool that they offer.
Do any of you have any recommendations on what I need to focus on in improving my knowledge base?
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Hi Guys,
So i read alot about the sales tactic of keyence and a few of you obviously hate their "CMMs"
So my Situation is: i started out with my own shop and i have parts with about 0,3mm wide slits. So vision based system it is.
I have a deal for about 33% off on a completely new one.
I even had the sales rep here and demoed the product.
In my opinion it is not as easy and fast as suggested but pretty easy and fast, the measurements were also pretty accurate as far as i can validate.
So what is your honest opinion, which i can gake into consideration before wasting money.
Pros and Cons?
Hi all,
Hoping someone can clarify, measuring a ring gauge on our Zeiss CMM, if I measure in the traditional manner, moving the probe head around the diameter, I get a different result compared to keeping the probe head fixed and turning the rotary table! Myself and my colleagues all believe that that we should be getting the same result? The 2 circles are identical in terms of number of points, Z-height, alignment and filtering etc, the only difference is which part moves, the probe head or turn table.
Hello, I am not sure if this topic belongs in this sub if any of you could help it would be great thanks.
Last two summer I´ve worked making interior space surveying at industrial warehouses as to make some extra money. Until now I have been doing it by measuring individual lenghts and sketching in site, and then making a digital blueprint.
I wanted to know if someone knows about a scanner that would scan the distances and create a 2D point cloud. I know a 3D scannner could do a much better job, but I don´t need the blueprint to be very precise and these scanners are out of my budget.
So far I have found 2 different shops that have devices that could suit for these jobs, they rotate and scan the room, and make a DXF file with the outline of the room, I will add the links at the bottom of the post, but if anyone knows similar devices or knows a better way of doing it, I would be very grateful.
Can anyone point me in the direction of calibrating a fcr25 probe rack?
I'm trying to export my SPC in process data to Excel per customer. I open the run but when I hit Tools, Export Wizard is greyed out. Do I need to select the data some how or am I just missing modules in the install?
Hey guys have any of you used Keyence XM 5000
Is there anyone out there using this machine or similar? When I was learning Zeiss CMM’s, there was a wealth of knowledge available on the forums. Not so much for this machine. I’m looking for some advice on a few things and can’t find any information online. The manual that came with the machine leaves a lot to be desired.
Hello All,
Sorry if this is a real basic question but I haven't assembled a star probe before and inherited our CMM from our previous engineer who left suddenly. Anywho, my question is how do you maintain alignment for the star probe in relation to the x,y axis of a CMM? I have a SH25-1 stylus holder (A-2237-1301) with a few extensions/adapters with a A-5003-4787 star probe. Need the 0.5mm tips for a really small aperture size but am worried about alignment and shanking out because the alignment seems so far off. You're supposed to assemble it with A-5000-7835, am I over tightening it or am I missing something really basic because it looks like to me no matter how I assemble it, it is still 5 degrees off no matter what.
Hello, We are thinking about the pros cons of being an external metrology lab.
One of my worries is most of big manufacturing plants have or plan to have their own metrology or calibration lab, so how easy would it be to lose a client because of this?
What are the pros cons of having an external lab and what should we consider that we might not see right now?
I am even doubtful on how to quote measurements ..
Any feedback is highly appreciated
Hello all,
This may be my first ever Reddit post, and is definitely my first ever work-related Reddit post. To make a long story short; I was hired to my current job in a CNC turning shop as a Quality Technician. Check parts, number blueprints and make inspection charts, train operators, program our MicroVu and Keyence, etc. We just recently got awarded some aerospace work and our customer requires use of Johnson Gages on each threaded part. About 3 days after our JG got in, our Quality Engineer, the only person in the building with any knowledge on these gaging systems, quit without any notice so naturally it has fallen to me to figure out. We were provided training videos that are simply invalid, as I follow the instructions to a T, and the functional blocks are either loose and moving horizontally, or too tight and not moving at all. I think my screw is bent, causing it to work as a locking nut of some kind. I really don’t know what I’m specifically asking for here, other than if anyone here has ANY sort of guidance or tutorial videos they could send my way, it would be incredibly appreciated. We have 1BX and 1CX frames, all 0-1” standard threads. I am quite desperate for help. If I am posting in the wrong forum, please point me in the right direction. I do not want to fail, but feel as though I already have.
TIA -K
Any one know how upload the custom report for saving as .pdf? I've created the report, but no matter what I do, every time I try to print/save, it goes back to default.
We are a company manufacture rubber seal ring. We have plan to buy IM8000 system,it looks great for our project.Sample to use, quickly measure,but expensive.
We prefer the IM8010 because it is high cost performance.Also we compared to IM8020 that have a light probe and more expensive.
I’m curious about the light probe,is it works for our projects? Is it worth for USD10,000?
Hello, I work in a camshaft production company and we have an assembly line where cam lobes are fit onto a camshaft. The cam lobes come on a conveyor, the lobes have 22.5mm diameter bore with a tolerance of plusorminus 7 microns. We are looking to automate this quality inspection of the bore. What ways do I have where I can check the bore diameter upto 7 microns accuracy in a way that I can automate its segregation too?
PC-Dmis TesaSTAR SM65 Leitz LSPX1H T
After taking its hits, I get an "Error Calculating deflection matrix".
No results show after the failed calibration.
A. What am I doing wrong? B. What settings do you all use for probe calibration?
Just had a demo of the keyence Lm-x and it was lack luster. We currently have the base LM and although it has its faults it is great for quick measurements and easy for operators to use. I work for a company that considers microns pretty big. We have lots of OGP’s that work great but not simple enough of setups for our manufacturing measurement operators to use.Thats why we started programming parts to use on the keyence so they have fast measurements when all they have to do is throw it up on the stage. I guess I’m curious are there any other machines that have the same pattern recognition but are more accurate(especially in the z axis).
So, if I create a secondary alignment of a feature, just to check that the nominals of that feature are correct, and then I create this same feature but leave its alignment as the Base Alignment, does it affect reporting the Position if I use the secondary alignment for both the Datum reference frames in the Position characteristic? Basically I’m curious about how the feature alignment correlates to the base alignment and secondary alignments? It seems to me that it shouldn’t matter what the feature alignment is as along as you create a secondary alignment to use in your Position DRF that correctly locates the feature as specified on the print. I hope this makes sense. Any info would be greatly appreciated!
We have a hexagon(tesa) HH-AS8-T2.5 on a global we run. It’s currently running a scanning head and we want to convert it over to TP20 touch trigger because we have had to replace the head quite a few times over the last year from weight and not enough torque. We’re back in the same situation, shelling out big money for replacement. We got rid of the job on this machine and moved it to another machine with older technology(still scanning), touch points suits the new application way better.
What’s all needed to convert the HH-AS8-2.5 to handle a TP20?
Not trying to go to Hexagon as they just hold their hand out for every little support issue.
Machine starts to move towards "Home Position"...reaches it, then moves past it and kinda bounces away slowly drifting towards the back of the Machine.
I am new to this Machine, but previous operators claim this happens sometimes. Not sure what to do. Any suggestions?
I’ve been in the aerospace industry for a military company for five years this July. I live in the LA area and been working with the same company since I’ve began my career with no experience starting at the age of 26. I’m truly grateful for the opportunities the company has given me and I enjoy what I do. I solely focus on the mechanical/dimension side of inspection. And I also have experience with ESD parts. But after Covid hit and trying to recover for that. We have been extremely slow to the point I’m seeking for a career change or different path within quality. I’ve looked at other hiring positions and what’s being offered out there is not close to what I make so I feel stuck at the moment. Also, I have no experience with CMM’s or romer arms. I did attend community college to earn a certificate but not attending at the moment hoping this fall semester. Any suggestions for a woman in this industry?