/r/Metrology
News and discussion related to the science of measurement and calibration.
We are also here to help a hand to any and all people looking for help with metrology, inspection and layout questions
Useful subreddits:
/r/Metrology
13,302 Subscribers
Digital indicator for sale in MEXICO
Hello ive got a LMI d-back 3553w 1/2" digital indicator for sale in Mexicali , B.C. Mexico. Anyone interested in getting it? Feel free to send me a message so i can send you pictures and info
11:21 UTC
Laser scanner set up
Hi All,
Is anyone here aware of how to be able to set up a RS5 scanner head to have the same lazer output as an older HP-L scanner? There is certain materials I have to scan and for some reason when scanning this material on the RS5 scanner it keeps coming out with misalignment, I have spent like a year now and then adjusting the setting slightly and can see the difference but unable to finally have a good result.
Thanks
09:21 UTC
I'm trying to get to know what this component is (resistor, capacitor, or something else?), and what value it has (e.g., resistance [Ohm], or capacitance [F]).
I'm trying to get to know what this component is (resistor, capacitor, or something else?), and what value it has (e.g., resistance [Ohm], or capacitance [F]).
At first I was quite sure that it is a capacitor because of it's coloring, and thought it read around 0.8 pF, but now I am doubting, and the 0.8 pF reading is achievable without the component, just by bringing both lead ends closer together on parallel capacitance measurement mode on 100kHz.
Maybe you can help me out, as I have no idea how to measure it.
The readings are quite all over the place.
This video is me trying to measure it on capacitance mode on a DER EE DE-5000:
https://youtu.be/yuof1fu6fRU?feature=shared
All help is very much appreciated!
I will upload my Ohm measurement attempt shortly.
edit: Ohm video:
https://youtu.be/xAOom--sgwg?feature=shared
More close-up photos of the component: https://imgur.com/a/s3hCpFz
Any suggestions how I can measure this component? I bought Probe Master 8152 spring loaded micro-tip test leads, but those do not seem to work with the EE DER DE-5000.
https://eleshop.eu/probe-master-8152-spring-loaded-micro-chip-test-lead.html
18:44 UTC
What measurement can I do to determine if a ceramic SMD component is either a resistor, or a capacitor?
What measurement can I do to determine if a ceramic SMD component is either a resistor, or a capacitor?
16:13 UTC
Can't seem to get the 'Probe Master 8152 spring loaded micro-tip test leads' calibration to be used with a 'DER EE DE-5000'.
I can't seem to get the 'Probe Master 8152 spring loaded micro-tip test leads' calibration to be used with a 'DER EE DE-5000'. It either gives failed during open calibration somewhere during the 30 second hold, once finished it succesfully, and then went to closed calibration failure in the last few of the 30 seconds hold.
I want to measure this 0201 component on the tip of the standard DER EE DE-5000 SMD leads Any suggestions? Thank you in advance!
15:08 UTC
Can the 'Probe Master 8152 spring loaded micro-tip test leads' be used with a 'DER EE DE-5000', and measure accurately?
Can the 'Probe Master 8152 spring loaded micro-tip test leads' be used with a 'DER EE DE-5000', and measure accurately?
19:12 UTC
Will measuring a capacitor, or resistor, with a DE-5000 with 99.9% IPA give wrong results? I don't know how else to measure this without losing it.
Will measuring a capacitor, or resistor, with a DE-5000 with 99.9% IPA give wrong results? I don't know how else to measure this without losing it.
It's on the tip
18:58 UTC
Measuring distance between burrow entrances from underwater TV surveys
I am a biologist and we conduct a survey for Nephrops (Norway lobster) by counting their burrows using an underwater camera attached to a sledge. We are interested in measuring burrow size, but have run into the problem of perspective. These animals make complex burrows with more than one entrance and we would like to measure the distance between entrances. On the images we have laser lines 1 meter apart, which should be helpful in determining the size of the burrow. Note that the burrows can lie in any plane of the image, so one entrance could be at the bottom of the image and the other near the top. Here is an example image with the laser lines and a red line indicating a distance to measure. I know this is all assuming a flat plane, which it is not, but we have to make some assumptions. What tools are available to help with this? Ideally, I would write an R script where I could provide the X,Y coordinates of two entrances and the distance would be estimated, but I am at a bit of a loss as how to do that.
12:14 UTC
Used cmm advice
We need to buy a cmm for work. Based on our long narrow parts and associated hard gauges we landed on 2500mm for the longest dimension for a cmm. The quotes we got were in the $500k range from several vendors; and to say management isn't happy with that price tag is an understatement.
So I'm now tasked with finding a used cmm, and to say I know less about buying a used cmm than I know about buying a used CNC would be accurate.
- What do I need to know about buying used cmms?
- What are the gotcha points?
- What are the compromises being made in buying used vs buying new?
- what are the major costs for used vs buying new?
- how do you avoid buying someone else's problem machine?
- how do you avoid buying a used slow machine with reduced accuracy over the whole measurement volume vs a new machine?
- Are 5-axis head upgrades worth the cost?
- who are good used cmm resellers?
- what other things should be considered when buying a used cmm?
16:34 UTC
How would you convince your Boss that your CMM needs a Software Upgrade? (Mcosmos)
A few things to myself. Im working in a midsized Composite Plant, which produces primary Materials as Tubes and Plates. We also got a Shopfloor with around 15 CNC machines.
My primary responsibility is meassureing the finished Parts on a Mitotoyo Crystal Apex with Mcosmos 4.
Im used to the Software, and have no problems with programming everything with teach in. Even tho its a pain in the ass.
I would however like to move towards offline programming, the programm u need for that is Cat1000p, wich costs around 5k USD. Software upgrade from mcosmos 4 to 5 would be optional.
Do you guys have any good arguments for me? Have you been in a similar Situation?
08:14 UTC
About Stylus System Qualification:
Hi,
I have built a new stylus system which is facing Z+ direction. I have a query about qualifying this stylus.
Do I need to add the length of extension or calypso will automatically calculate ?
What should be the tilt of the reference sphere, and the values for orientation and tilt during qualifying master prob. Should I keep the sphere in 90 degree angle like shown in image for qualifying this stylus.
Thanks
20:08 UTC
Is there a humidity monitor/tracker that's transportable similar to an Apple Air Tag?
I'm sending a large shipment which is a 10x10x10 foot machine in a crate on a flat bed truck, and I want to make the thing waterproof. To prove that it's waterproof, I want to put a humidity monitor in it. Ideally, I can tell from a distance what the humidity is inside the machine. Is there such a thing, and if so, what's the best brand?
14:39 UTC
Software Compatibility for Vision CMM's?
Hello, I'm new to the world of CMMs and just acquired a used Nikon iNEXIV VMA-2520 with Tactile Probing option. I believe default SW for this unit is the 'Nikon Automeasure', and the more advance co-developed SW is 'CMM-Manager'. My question is how to know and explore which other 3rd party SW may support Visual/Optical CMMs. It's difficult for me to tell conclusively from the information available online for each SW. Some of the popular 3rd party SW that I've come across for example is 'Autodesk PowerInspect', 'Hexagon PC-DMIS', 'Innovmetric Polyworks'. Does anyone know if these 3rd party SW can work with the Vision function of this particular Nikon VMM? Or is only option to stick with Automeasure or CMM-Manager for compatibility? Thanks so much in advance.
11:05 UTC
Flip the Probe Compensation For Features In PC-DMIS
Hi All,
I was wondering if anyone knows how to flip the probe comp while taking points in PC-DMIS. It gets it right about half the time, but I was wondering if there is a way I could just indicate "comp inside/comp outside" as I'm quickly running around a part.
Thanks!
18:28 UTC
Tube Inspection Ideas
I'm currently working on an ongoing project that involves inspecting tubes. We would like to inspect geometric tolerances like size, circularity, cylindricity, and runout on both the internal and external surfaces, but it is currently difficult for us to measure data more than a few inches into tube's interior.
Here are some general specs:
- Length: about 2 feet to 8 feet
- Outside Diameter: about 2 inches to 8 inches
- Thickness: about .25 inches to 1 inch
Does anyone have any ideas for how we could measure these types of tolerances (or at least establish datums on) the inside surfaces of these tubes?
16:32 UTC
Issue with Z-Axis Values in CNC During Measurement Routine
This past week, I've encountered a recurring issue when running a program in DCC mode with the students. In manual mode, we have no problem taking measurements, but when we run the measurement routine in DCC, the CNC gives us an issue where it goes out of the Z-axis values of the machine (Image 3).
The problem occurs when the probe is positioned above the part (Image 1), but the machine coordinates are, for example, as shown in Image 2. When running the measurement routine, and the probe goes to Z0, that’s when we encounter the issue with the Z-axis values.
I assume I need to manually change the Z value? But I don’t know how to do it.
I also assume the students have accidentally changed that value at some point recently, as the problem is new.
I would appreciate any kind of help if somebody knows how to fix it.
Thanks in advance.
10:18 UTC
How to connect a MFO manual CMM to Polyworks?
Hello!
Our company has been using Metrolog x4 for a while, however, our boss wants all of the new hires (including me) to learn Polyworks. I am running into an issue where I do not know how to properly set up the software in order to connect to our CMM. Our setup is as follows:
MFO manual CMM
Renishaw MIH probe head
Metrologic group ME3008 counting box.
I'm still new to this work field, so go easy on me :) Thanks!
05:50 UTC
Metrology app for hand held data capture
Hi all. Let me know if this is something you’d pay 10 bucks a month for. It’s software that:
wirelessly connects any number of gages to a phone or iPad or laptop, no training just works.
collects measurements, displays as readings, go/no-go, statistics, tolerance, and takes a picture of the part
feeds the data into a buyers QA or quality system, or creates a record that can be sent with parts to a buyer
Let me know what you think ..
02:00 UTC
Zeiss scanbox question
Scanbox question
Does anybody know what the thread diameter is on the scanbox 5 rotary table?
I had somebody measure and they’re saying the diameter was 9mm which would be m9.
It’s just such an unusual size; that it makes me suspicious that it was done right.
(Side question I’m trying to find offline or downloadable scanbox training materials if anybody might have some to share I would be appreciative!)
16:48 UTC
How to choose test frequency for small capacitance 0201 capacitors (e.g., 0.8pF) for measurements? (1kHz, 10kHz, 100kHz, 100Hz, or 120Hz?)
16:23 UTC
How to use the DE-5000 guard line TL-23 to measure high impedance components such as a small capacitance 0402 and 0201 capacitors?
How to use the DER EE DE-5000 guard line TL-23 to measure high impedance components such as small capacitance 0402, and 0201, capacitors?
14:15 UTC
Can be rightly concluded that the larger the capacitance => the lower the impedance; and the lower the capacitance=> the higher the impedance?
14:10 UTC
What does the future of human dimensional quality inspectors look like?
As the title says - what do you predict the future looks like for human dimensional quality inspectors using manual gauging (particularly for aerospace OEMs)? With the creation of Keyence instant measuring vision systems, and CMM’s with auto-loaders are humans in this role inevitably going to be completely replaced, or will their roles shift and if so what does their new role in manufacturing quality look like?
Reason I ask is because I’m a former dimensional inspector at OEM and MROs and recently transitioned to the NDT side of quality within the aerospace industry hoping it to be more future proof of a job + higher paying though I miss it.
18:53 UTC
What is the difference in using a capacitance meter in Cs or Cp mode to measure an off-circuit ex situ capacitor? (series and parallel capacitance I assume).
What is the difference in using a capacitance meter in Cs or Cp mode to measure an off-circuit ex situ capacitor? (series and parallel capacitance I assume).
18:39 UTC
May I know how to understand the mobile calibration instruments on you side?
03:26 UTC
Orientation of Zeiss Calyspo
Hello,
I am working on a program sent from our customer who wants us to use their program to verify dimensions as their are discrepancies in our results. They have a different fixture set up then ours, so we have difference of alignment.
I have a query about how can I rotate the alignment of the tube to match to our alignment, so it can also match all the existing features as well. Since, I am using special feature from base alignment (used rotation by angle option), all the hole features are keeping their original positions.
Is there any way, I can rotate the orientation while also moving the features along with it.
Processing img g97bicfmm42e1...
Thanks.
21:44 UTC
High accuracy photogrammetry?
We are planning to buy a high end photogrammetry equipment.
We have narrowed down to Hexagon - Aicon and V-STARS Photogrammetry.
Does anyone know of more such companies for very high accuracy photogrammetry?
practically ALL the papers that I could find online, mention V-STARS, and I cannot find any comparative tests between these two photogrammetry equipment. Does anyone have a comparison between Aicon and V-STARS?
Aicon is VDI compliant, but the test is carried out on a relatively small structure, and the VDI standard completely ignores system accuracy on large volumes, say 20m x 20m x 20m. I found an old brochure for Aicon online, before they were bought over by Hexagon, and it states that the max volume is 10m3. This line is removed from the Hexagon brochures. Would 10m3 mean 10mx10mx10m? Or does it mean approx. 2mx2mx2m?
Additionally, the brochures mention 2um measurement error, with a fine print clarification that mentions "MPE" 15um+15um per meter. Does anyone know about the maximum size of object for Hexagon photogrammetry and the machine accuracy for large volumes?
09:15 UTC