1. Improper belt installation causing apparent excessive belt stretch:
Pulley belt through counterweight with a tension equal to at least empty running tension; Run belt in with mechanical fasteners.
2.Improper initial positioning of counterweight in its carriage causing apparent excessive belt stretch:
Consult ContiTech (Shandong) R&D department for recommended initial position DIN22101 section 10.3 recommended the ratio be ≤3.
3.Insufficient counterweight travel:
Consult ContiTech( Shandong) R&D department for recommended minimum distances.
4.Tension too high:
Increase speed, same tonnage; Reduce tonnage, same speed; Reduce friction with better maintenance and replacement of damaged idlers; Decrease tension by increasing arc of contactor go to lagged pulley; Reduce CWT to minimum amount.
5.Counterweight too heavy:
Lighten counterweight to value required by calculations.
Recalculate belt tensions and select proper belt.
Contact: Export Department
Phone: +86 15097752737
Tel: +86 0312 5308005
Company: Baoding Zhuoli Machinery Co.,Ltd
Add: 3934 Tower3,Weilaishi building,Xiongan New Area.Baoding city,China