Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

Wheather issues to belt scale

Created by: AutoGen_564002 at: 10/22/2015 12:14 PM (4 Replies)

Rating (2)

Thanks 0

5 Entries

10/22/2015 12:14 PM	Rate (0)
AutoGen_564002 Regular Member Joined: 3/13/2015 Last visit: 6/8/2022 Posts: 9 Rating: (0)	Hi How to reduce the influence of temperature to accuracy of belt scale? My belt scale system vibration too much at belt running empty in the morning and the affternoon. Perform Zero: - Deviations In the morning is 0,02% ( time: 6h , temperature is 25 degrees) - Deviations In the afternoon is 0,7% to 0.79 (time: 14h, temperature is 25 degrees) My belt system: - Conveyor length: 190m - Ange of the conveyor: 7 degrees - Take-up: 1,9 tonne - Location of the belt scale is near the tail pulley Thank you a lots

Suggestion To thank Quote Answer

10/23/2015 8:42 AM	Rate (1)
Levelmans Bronze Member Joined: 12/13/2012 Last visit: 10/5/2023 Posts: 124 Rating: (45)	Hello , I guess, that there is no temperature compensation available for a beltscale. Please consider, that a 190 m long belt will always gets a bit stretched at higher temperatures. What kind of tension device are you using ? A gravimetric one will compensate a influence at it best. Also a very painstakingly made alignment is crucial for a most proper measurement. Very important is also the location of the scale. Attached you will find a guide to find the best area. Anyhow, deviations of 0,02% and 0,79 % sounds not bad. What kind of beltscale are you using ? MMI-2 ? Hope this helps ! Cheers. Attachment Belt_Scale_Application_Guidelines.pdf (205 Downloads)
	Last edited by: Levelmans at: 10/23/2015 10:10:40 AM
Suggestion To thank Quote Answer

10/23/2015 12:45 PM	Rate (0)
AutoGen_564002 Regular Member Joined: 3/13/2015 Last visit: 6/8/2022 Posts: 9 Rating: (0)	Hi Many thanks for your reply. Our Tension device is Vertical gravity take-up, location of the scale very good and we don't have temperature compensation equipment. Beltscale is MMI-2, BW500, speed is RBSS. We plan to reduce the weight of take-up to reduce tension vibration. how do you think?

Suggestion To thank Quote Answer

10/23/2015 2:08 PM	Rate (1)
Levelmans Bronze Member Joined: 12/13/2012 Last visit: 10/5/2023 Posts: 124 Rating: (45)	not sure, whether it make sense to reduce the weight here. Just another thing. Are you using misalignment switches like the Kiepe HES ? Please find the specs attached. BR Levelmans Attachment 2013_495_HES_EN.pdf (204 Downloads)

Suggestion To thank Quote Answer

10/23/2015 6:00 PM	Rate (0)
AutoGen_564002 Regular Member Joined: 3/13/2015 Last visit: 6/8/2022 Posts: 9 Rating: (0)	We plan to reduce the volume of gravity take-up to reduce the influence of temperature to belt tension. We will try it tomorrow and tell you about the results. I see the following text from siemen's Website: Wide temperature changes can cause a belt to be longer or shorter (at least that’s my excuse during the winter holidays). Of course, changes in length will effect the tension of the belt as well as alter the accuracy. Using a gravity tensioning device on conveyors longer than 100 feet and setting the belt tension as loose as possible, without allowing the belt to slip, will minimize the effects of temperature changes. Even when taking these precautions, it is still a good idea to include at least two calibrations per season. Thank you very much.

Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Follow us on