[Da...] Posted February 14, 2020 Share Posted February 14, 2020 Does anyone have any experience with temperature sensors on their Zeiss CMM's? I am considering using temperature compensation due to the higher demand for tighter tolerances and would like to get an idea of what upgrades I might need. I believe the temperature can be entered manually at the beginning of the run if no sensors are installed? Can the sensors be purchased/ installed for each axis and/or a part sensor? Do you have to purchase the Tempar system in order to incorporate these sensors? I am waiting to hear back from Zeiss but I figured in the meantime I might as well ask on here as well. I think the Tempar setup would be outside of our budget so I would be interested in possibly upgrading just the machines themselves. Thanks! Link to comment Share on other sites More sharing options...
[SH...] Posted February 14, 2020 Share Posted February 14, 2020 Please sign in to view this quote. Your machine and software must have temperature compensation option, I think if you maintain the room temperature perfectly then there is no need of in temperature compensation sensor unless your checking highly precise parts... Link to comment Share on other sites More sharing options...
[Ke...] Posted February 14, 2020 Share Posted February 14, 2020 I drive an Accura II, that has the temperature sensors installed. There are two sensors, that can be used individually or together. You do not need the Tempar system, but if you are not tracking & controlling your temperature throughout your lab, I would suggest that you start with that. Get a system in place that monitors your lab temperature (preferably: "20 °C ± 2 °C, and should be measured with an accuracy of 0.5 °C. The temperature variation should be less than ± 1 °C over 24 h and ± 0.5 °C during any 1-h period" per NIST) If you are not properly controlling the labs temperature, then the compensation that is applied may not have much value. Link to comment Share on other sites More sharing options...
[Jo...] Posted February 14, 2020 Share Posted February 14, 2020 You can input part temperature and thermal expansion coefficient and it will adjust all dimensions. This would be helpful when you have a large mass part in production and don't won't to delay 24 hours to acclimate to control temp. Accounting for temperature swings within the cmm lab is an entirely different deal. Which are you wanting compensate for ? Link to comment Share on other sites More sharing options...
[Da...] Posted February 14, 2020 Share Posted February 14, 2020 We use the temp sensors all the time... even with a temp controlled room, unless you let your parts "soak" for an hour or two , you can't be really sure that they are at the same temp as the room. We have checked "hot " (85- 95 deg. F ) aluminum parts from our honing department using the temp sensors strapped on with rubber bands and saw a total of .00015 (inches) drift the next day after stabilizing overnight ! They work great ! Link to comment Share on other sites More sharing options...
[Ün...] Posted February 17, 2020 Share Posted February 17, 2020 It can vary according to the size of the piece and material type to be measured as well as the environment where the CMM device is located. As the part diameter increases, the temperature-related variability is seen more. Example: The part with an outer diameter of 70 mm saw an average of 0.002 of variability. The part, which we rarely process and has a diameter of 180 mm, has a variability of 0.01 mm. For this we have to wait 2 hours in this laboratory for 2 hours. Link to comment Share on other sites More sharing options...
[Da...] Posted February 17, 2020 Author Share Posted February 17, 2020 I am working with our maintenance department to address some of the smaller things that might be affecting the stability of our room temp such as installing hardware to "auto close" doors and the possibility of using a better thermostat for our AC unit to fine tune and eliminate dead spots. I am looking into a system to better monitor and possibly log the room temps. I would like to have a set of accurate thermometers near each of our machines (2 Conturas) with the possibility of storing and reporting temp data on software. I see there are several options for this available but don't want to spend a small fortune to get something in place. Does anyone have any experience or recommendations with any of these setups? Unfortunately we would have a difficult time allowing parts to "soak" as we operate in a fast paced environment and any reduction in our measurement times would be frowned upon. This is where I was considering getting a decent infrared thermometer to shoot the part temp prior to measurement and enter that data at the beginning of run. Thank you all for your input it's truly appreciated, I think we will start tackling the little things and work to stabilize our environment then go from there! Link to comment Share on other sites More sharing options...
[Gr...] Posted February 18, 2020 Share Posted February 18, 2020 Something to note Infrared thermometers vary wildly based on the surface measured. Link to comment Share on other sites More sharing options...
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