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SITRANS WW300
Operating Instructions, 05/2015, A5E33560691-AB

Troubleshooting

9.1

Mechanical troubleshooting

Review mechanical installation procedures and perform a thorough visual inspection to be sure

the operating error is caused by a mechanical problem. Then review and check the common

problems listed below.

Note
If you have difficulty determining the cause of the problem, contact your Siemens

representative. Be sure to have the Model Number and Serial Number of your system and all

of the calibration and setup parameters available before calling.

9.2

Zero Drift, non-repeatability, or non-linearity

Check for the following conditions:

●

weigh idler alignment

Verify weigh idler alignment is as accurate as possible. Improper alignment is the most

common mechanical problem affecting scale accuracy. Contact your Siemens representative

if you find a problem here.

Note
Alignment should be +1/32" (+0.8 mm) to 0" (0 mm) aligned with approach and retreat

idlers.

●

material buildup on weigh section or pulleys, or between the weigh deck and weighfeeder

frame

●

belt mis-tracking

●

belt too tight

●

load cell bolts loose

●

speed sensor, pulley, or idler slippage

●

load cell shipping bolt (tagged) never removed

●

head or tail pulley too high or low, relative to idler alignment. The head and tail pulleys should

be at least 1/8" lower than the approach and retreat idlers

Содержание SITRANS WW300

Страница 1: ...Operating Instructions SITRANS WW300 05 2015 Edition Weighfeeders ...

Страница 2: ...f Liability This document is available in bound version and in electronic version We encourage users to purchase authorized bound manuals or to view electronic versions as designed and authored by Siemens Siemens will not be responsible for the contents of partial or whole reproductions of either bound or electronic versions While we have verified the contents of this manual for agreement with the...

Страница 3: ...________ ___________________ ___________________ ___________________ ___________________ SITRANS Weighfeeders SITRANS WW300 Operating Instructions 05 2015 A5E33560691 AB Introduction 1 Safety information 2 Description 3 Installing 4 Calibrating 5 Connecting 6 Commissioning 7 Maintenance 8 Troubleshooting 9 Technical data 10 Dimension drawings 11 ...

Страница 4: ... operated only by personnel qualified for the specific task in accordance with the relevant documentation in particular its warning notices and safety instructions Qualified personnel are those who based on their training and experience are capable of identifying risks and avoiding potential hazards when working with these products systems Proper use of Siemens products Note the following WARNING ...

Страница 5: ...4 1 Installation steps 12 5 Calibrating 15 5 1 Test load 15 5 2 Zero 15 5 3 Span 15 6 Connecting 17 7 Commissioning 19 7 1 Shear gate 19 7 2 Skirtboards 19 7 3 Changing the conveyor belt 20 7 4 Belt tension 21 7 5 Belt tracking 21 7 6 Telescoper adjustment 22 7 7 Weigh idler alignment 23 7 8 Quick startup overview 23 7 9 Load cell replacement 23 7 9 1 Removing old load cell 24 7 9 2 Installing new...

Страница 6: ...enance 28 8 3 Lubrication 29 8 4 Weighfeeder storage recommendations 29 8 4 1 Load cell care 29 8 4 2 Gear reducer 29 8 4 3 Electrical 29 8 4 4 Lubrication 30 8 4 5 Belt care 30 9 Troubleshooting 31 9 1 Mechanical troubleshooting 31 9 2 Zero Drift non repeatability or non linearity 31 10 Technical data 33 10 1 Specifications 33 11 Dimension drawings 35 11 1 Open unit 35 11 2 Enclosed unit 36 Index...

Страница 7: ...ation for your weighfeeder model is also included with the product such as testing documents Follow these operating instructions for quick trouble free installation and maximum accuracy and reliability of your device We always welcome suggestions and comments about manual content design and accessibility Please direct your comments to Technical publications mailto techpubs smpi siemens com For the...

Страница 8: ...Introduction 1 1 The manual SITRANS WW300 6 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 9: ...ING Always follow established safe operating practices when working on or around the weighfeeder especially in wet environments and when adjacent to conductive steel mounting framework Note A weighfeeder can be dangerous Pinch points exist along the conveyor belt line Secure the weighfeeder when replacing the belt working on or around the load cell s working on or around the speed sensor working o...

Страница 10: ...Safety information 2 1 Safety and general precautions SITRANS WW300 8 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 11: ...of material in process A weighfeeder can also control the rate of flow of the conveyed product In motion weighing requires accurate transmission of the product load to load cells The resulting voltage signal corresponding to weight is transmitted to the integrator and becomes one of the two inputs required for integration Unlike static weighing in motion weighing integration requires a second inpu...

Страница 12: ...Description 3 1 Weighfeeder operation SITRANS WW300 10 Operating Instructions 05 2015 A5E33560691 AB Enclosed unit Open unit ...

Страница 13: ... possible shipping damage Contact the carrier immediately if damage is noted Your weighfeeder has been designed assembled and factory tested for your specific application Note The frame of the weighfeeder needs to be grounded to ensure accurate signal processing to the integrator Do NOT remove the tagged load cell shipping bolt s until the installation is complete to prevent load cell damage Do NO...

Страница 14: ...ween the flanges for dust control 4 Securely fasten the unit to the rigid level structure constructed in step 1 Use a level for verification and shim as necessary Prevent any twisting of the frame that may affect weighfeeder performance Note The inlet and discharge of the weighfeeder will not support load 5 Note If your system has a permanently lubricated gear motor then disregard this step and pr...

Страница 15: ...bility of load cell damage resulting from incidental overload 9 Remove the locking pin on the belt plow and scraper to allow them to contact the belt properly On units with an optional gravity tensioner and tracker the locking pin will also need to be removed Note Store these pins as they can be used to support the parts during a belt change 10 Before starting the weighfeeder make a final check to...

Страница 16: ...Installing 4 1 Installation steps SITRANS WW300 14 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 17: ... for the weighfeeder is given on the accompanying test sheet To calculate the test load or to change it refer to the integrator instruction manual 5 2 Zero Perform the zero calibration as described in the Calibration section of the integrator manual Note This calibration should be at least three belt revolutions or five minutes whichever is longer 5 3 Span The test load used in the calibration pro...

Страница 18: ...Calibrating 5 3 Span SITRANS WW300 16 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 19: ...15 A5E33560691 AB 17 Connecting 6 Note Standard wiring shown consult wiring diagrams for optional electrical connections On hazardous rated versions the termination box may not be included with the weighfeeder or may appear different than shown ...

Страница 20: ...Connecting SITRANS WW300 18 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 21: ... Belt tracking Page 21 7 1 Shear gate The shear gate on the inlet of the weighfeeder needs to be set to allow the maximum feed rate capacity required Consult your Siemens representative if feed rate changes are required 7 2 Skirtboards The skirtboards have been factory set to proper specifications Note that near the inlet the skirtboards are very close to the belt However toward the discharge end ...

Страница 22: ...charge end grab the edge of the belt and gently pull it over the side rail making sure that the leading edge of the belt does not catch on any components 5 Repeat the previous step on the inlet end of the weighfeeder Again be careful not to cut or scrape the belt on any components 6 When both ends have been pulled to the outside of the side rail grab the belt in the middle and slowly remove it As ...

Страница 23: ... other operating characteristics 7 5 Belt tracking Before attempting to track the belt be sure belt scraper is in place belt tension is near guidelines suggested in Belt tension Page 21 weighfeeder is level and true installation has not warped or twisted the frame head and tail pulley are square to the frame and parallel to each other plow is contacting underside of the belt belt is engaged with g...

Страница 24: ...nd 3 may need to be repeated to obtain perfect belt tracking Note As you extend or compress the telescoper you may be changing the belt tension If belt tension has increased or decreased considerably while attempting to track the belt then compress or extend both telescopers and complete the belt tracking process again To avoid this problem extend one telescoper while compressing the other to obta...

Страница 25: ... approach and retreat idlers Load cell base locking screws 7 8 Quick startup overview 1 Verify that the weighfeeder is installed properly as described in Installing Page 11 Verify that the belt is tracking and the shear gate if used is properly set 2 Verify that the weighfeeder integrator controller and variable speed drive AC or DC if present are all properly wired 3 Refer to the supplied integra...

Страница 26: ... cell may be damaged Consult your Siemens representative 2 Disconnect the load cell being replaced from the junction box Verify that the load cell is connected according to the interwiring diagram supplied with this manual Disconnect the load cell from the load cell junction box Free the load cell cable from the weighfeeder so it is hanging free from the load cell 3 Support the scale idler from be...

Страница 27: ...ith the approach and retreat idlers Alignment should be 1 32 0 8 mm to 0 0 mm Both load cells should be within 1 mV of each other when compared otherwise mechanical interference is affecting the output signal Check load cells to ensure they are level and parallel to each other and the frame 6 Perform a load cell balancing procedure as described in the integrator instruction manual 7 9 3 Recalibrat...

Страница 28: ...Commissioning 7 9 Load cell replacement SITRANS WW300 26 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 29: ...e weighfeeder 8 1 Preventative maintenance The maintenance schedule below is recommended to maintain top performance and accuracy of the system Weighfeeders mounted in severe weather or dusty conditions may require a more rigorous maintenance schedule Make sure the weigh idler is aligned with the approach and retreat sections for accurate weighing Periodic measurement to verify alignment is recomm...

Страница 30: ... notes below Belt Check for holes wearing frays or other damage Weekly Replace as required Belt side rollers scraper plow Check for wear and proper belt contact Weekly Clean and replace as required Infeed seal strips Check for holes wearing frays or other damage Weekly Replace as required Pulleys Check lagging for wear Every 10 000 hours Inspect and replace as necessary Note In extraordinary clima...

Страница 31: ...y lubricated No lubrication is necessary 8 4 Weighfeeder storage recommendations If a weighfeeder will be stored for a period of three months or more follow the guidelines below 8 4 1 Load cell care The load cell shipping bolt s should be installed whenever the weighfeeder is moved as an extra safety measure during the storage period Do not forget to remove the shipping bolt s upon re installation...

Страница 32: ...s 05 2015 A5E33560691 AB 8 4 4 Lubrication Grease all greasable points 8 4 5 Belt care Reduce belt tension to a minimum to prevent belt damage and re adjust belt tension at re installation Note Do NOT store the weighfeeder in direct sunlight as this will cause premature breakdown of the belt ...

Страница 33: ...t non repeatability or non linearity Check for the following conditions weigh idler alignment Verify weigh idler alignment is as accurate as possible Improper alignment is the most common mechanical problem affecting scale accuracy Contact your Siemens representative if you find a problem here Note Alignment should be 1 32 0 8 mm to 0 0 mm aligned with approach and retreat idlers material buildup ...

Страница 34: ...Troubleshooting 9 2 Zero Drift non repeatability or non linearity SITRANS WW300 32 Operating Instructions 05 2015 A5E33560691 AB ...

Страница 35: ...le point nickel plated platform IP66 standard 17 4 PH 1 4568 stainless steel triple beam construction for corrosive and washdown environments optional IP67 Non linearity 0 03 Non repeatability 0 02 Speed sensor Optical encoder driven pulley mounted C flange mounted magnetic pulse generator adapted between motor flange and reducer input flange optional Framework Cantilevered painted mild steel stru...

Страница 36: ... HP min TEFC or TENV 208 230 380 460 575 V AC three phase with shaft mounted gear reducer Larger other motor sizes and voltages available Shipping weight 410 kg 900 lbs minimum Approvals For use in hazardous rated areas consult with factory Note that only electrical components are rated and entire weighfeeder is not ...

Страница 37: ...it dimensions Belt Width B D 457 mm 18 850 9 mm 33 5 800 1 mm 31 5 610 mm 24 1003 3 mm 39 5 952 5 mm 37 5 762 mm 30 1155 7 mm 45 5 1104 9 mm 43 5 914 mm 36 1308 1 mm 51 5 1257 3 mm 49 5 1067 mm 42 1460 5 mm 57 5 1409 7 mm 55 5 1219 mm 48 1739 9 mm 68 5 1612 9 mm 63 5 1372 mm 54 1892 3 mm 74 5 1765 3 mm 69 5 ...

Страница 38: ... Enclosed unit dimensions Belt Width B D 457 mm 18 850 9 mm 33 5 800 1 mm 31 5 610 mm 24 1003 3 mm 39 5 952 5 mm 37 5 762 mm 30 1155 7 mm 45 5 1104 9 mm 43 5 914 mm 36 1308 1 mm 51 5 1257 3 mm 49 5 1067 mm 42 1460 5 mm 57 5 1409 7 mm 55 5 1219 mm 48 1739 9 mm 68 5 1612 9 mm 63 5 1372 mm 54 1892 3 mm 74 5 1765 3 mm 69 5 ...

Страница 39: ...ng the conveyor 20 D Drive 34 E Electrical storage 29 F Feed rate 19 Framework 33 G Gear motor 29 storage 29 Gear reducer 29 storage 29 General maintenance 28 Grounding 11 I Idlers 33 Inlet 19 In motion weighing 9 Installation 11 Integrator 9 9 15 15 23 L Load cell care 29 Load cells 9 33 Lubrication 29 storage 30 M Material temperature 33 Materials 33 O Operating range 33 Operating temperature 33...

Страница 40: ...ells 23 S Safety 7 Shear gate 9 19 Skirtboards 19 Span calibration 15 Specifications 34 Speed sensor 33 Speed sensor 9 Startup 19 Static weighing 9 Storing a weighfeeder 29 T Temperature material 33 Test load 15 Test weights 9 U Units 9 W Weigh bridge 9 Weighfeeders How they work 9 Z Zero calibration 15 ...

Страница 41: ......

Страница 42: ...mail techpubs smpi siemens com Subject to change without prior notice For more information www siemens com processautomation www siemens com level www siemens com weighing Siemens Canada Limited 1954 Technology Drive P O Box 4225 Siemens AG 2015 A5E33560691 Rev AB ...

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