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Milltronics Weight Lifter MWL – Instruction Manual

7ML19981CR01

Installation

The Milltronics belt scale must be completely installed before you install the MWL.
Please refer to the belt scale installation manual for installation details.

The MWL installation has eight stages:

• Drilling the crank body mounting holes
• Mounting the crank bodies
• Mounting the torque shaft
• Installing the crank handle
• Testing the unloaded MWL
• Installing the calibration weights
• Testing the loaded MWL
• Shimming the MWL (if required)

1. Drill left and right crank body mounting holes

• Refer to the appropriate MWL installation drawing for your Milltronics belt

scale.

• Measure and mark the locations of the mounting holes for each of the crank

bodies. The left-handed unit turns clockwise to raise weights and the right-
handed unit turns counter-clockwise: handing is marked on the crank bodies.

• Drill these holes as specified for 12mm (1/2") mounting hardware.

Note:

Check that there will be sufficient clearance for the MWL. (See detail, Check

Clearance for Conveyor Belt: page 8.) Clearance can be created artificially by
shimming the idlers in the scale area.

MWL48all.fm Page 6 Tuesday, June 12, 2001 8:23 AM

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Summary of Contents for MWL

Page 1: ...MWL MilltronicsWeight Lifter Instruction Manual June 2001 MILLTRONICS WEIGHT LIFTER ...

Page 2: ...on and in electronic version We encourage users to purchase authorized bound manuals or to view electronic versions as designed and authored by Siemens Milltronics Process Instruments Inc Siemens Milltronics Process Instruments Inc 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...

Page 3: ...earance 11 Test the loaded MWL 14 Shim the MWL if required Recheck base bar weight for clearance 15 Operation 17 Applying calibration weights 17 Storing calibration weights 17 Storing crank handle 17 Maintenance Procedures 19 Removing material accumulation 19 Greasing 19 Appendix I Installation Drawings 20 MWL Installation Drawing for the MUS STD Standard Duty Belt Scale 20 MWL Installation Drawin...

Page 4: ...ds support a base bar weight above the calibration weight supports of the belt scale either flat bar or horseshoe style calibration weights are available Locating notches in the base bar weight engage the calibration weights securely on the lifting pads in the stored position and the worm gear drive locks the lifting pads in place A manually applied locking pin secures the MWL when the calibration...

Page 5: ... bar or horshoe style to support other supplied calibration weights U clamp to secure flat bar calibration weights Base bar Weight Torque Tube Crank Handle Shaft Extension optional Right handed Crank Body Guide pin 2 Lifting pad 2 Connecting Shaft 2 Input Shaft 2 Left handed Crank Body Input Shaft Guide pin Removable Crank Handle Lifting pad lifts as it rotates Worm Gear Output Shaft Drive Plate T...

Page 6: ...base bar weight Rotate alternate weights through 180o so that the weights are staggered to stabilize the base bar weight Horseshoe Style Calibration Weights Horseshoe style Base bar Weight Horseshoe style Calibration Weights Flat Bar Base bar Weight Flat Bar Calibration Weights U bracket supplied with MWL Flat Bar Style Calibration Weights MWL48all fm Page 4 Tuesday June 12 2001 8 23 AM ...

Page 7: ...imum of 610mm 24 Calibration Weight Capacity MUS STD up to 175 lb 80 kg MUS HD up to 350 lb 160 kg MSI singly or MMI system up to 500 lb 225 kg Crank Arm Mechanical Advantage 20 1 Number of Revolutions required for raising or lowering 4 Calibration Weight Dimensions Mounting Dimensions See detail installation drawings on page 20 page 21 and page 23 for MUS STD Standard Duty MUS HD Heavy Duty and M...

Page 8: ...imming the MWL if required 1 Drill left and right crank body mounting holes Refer to the appropriate MWL installation drawing for your Milltronics belt scale Measure and mark the locations of the mounting holes for each of the crank bodies The left handed unit turns clockwise to raise weights and the right handed unit turns counter clockwise handing is marked on the crank bodies Drill these holes ...

Page 9: ...MUS scale and less likely with the other models If necessary select and position the appropriate size shim s Loosely mount each crank body to the conveyor stringers using 12mm 1 2 bolts nuts and washers Locking ball pin tethered to crank body Input shaft Crank body Shim if required Bolt Right hand counter clockwise rotating Crank Body Shown Nut Washer Note The crank bodies must be left loose to al...

Page 10: ...tighten the bolts nuts and washers that hold the torque tube onto the connecting shafts Check Clearance for Conveyor Belt Ensure there is 10mm 0 38 minimum clearance from the top of the torque tube to the underside of the return belt inadequate clearance will cause the belt to wear Allow additional clearance for belt sag If necessary shim the idlers in the scale area until the clearance is adequat...

Page 11: ...extension is required slide the female end of the extension over the exposed input shaft and secure the extension with a bolt nut and washer Slide the female end of the handle over the exposed input shaft or shaft extension Secure the handle in place using the tethered locking ball pin provided Shaft Extension Bolt Lockingball pin tethered to Crank Body Crank Handle female end Nut Washer Input Sha...

Page 12: ...ding or hesitation the crank bodies need to be aligned to each other Align the crank bodies to each other if necessary a Loosen the two bolts that mount each crank body b Turn the crank handle until the lifting pads have completed at least one complete cycle from a raised to a lowered position this process should automatically align the crank bodies c Retighten the bolts that mount the two crank b...

Page 13: ...ere is 10mm 0 38 minimum clearance between the underside of the base bar weight and the top of the lowered MWL lifting pads If necessary shim the belt scale and adjacent idlers to achieve this clearance Note Ensure adequate base bar weight clearance before adding calibration weights Lifting pads down Base bar weight applied Lifting pad lowered 10mm 0 38 minimum gap Calibration weight support Under...

Page 14: ...mm 0 38 minimum clearance between the underside of the base bar weight and the top surface of the calibration weight support when the lifting pads are fully raised If necessary shim the MWL to achieve this clearance Round guide pin engages the notch on the end of the base bar weight Underside of base bar weight 10mm 0 38 minimum clearance Lifting pad raised Top surface of calibration weight suppor...

Page 15: ... bracket see dimensions shown below If necessary move the two crank bodies further from the calibration weight supports to achieve this clearance Recheck the crank body alignment See Align the crank bodies to each other if necessary on page 10 Minimum clearance on MUS Scales 10mm 0 38 on MSI Scales 12 5mm 0 5 Vertical arm of calibration weight support Base bar weight MWL48all fm Page 13 Tuesday Ju...

Page 16: ...alibration weight supports If necessary move the two crank bodies further from the calibration weight supports to achieve this clearance Recheck the crank body alignment See Align the crank bodies to each other if necessary on page 10 Lifting pads raised Calibration weights applied Calibration weight support 2 Calibration weights Vertical arm of calibration weight support Minimum clearance on MUS ...

Page 17: ...tion the shim between the crank body and the conveyor stringer it should not be necessary to loosen or remove the torque tube connecting the two crank bodies After the shim is in position re install and tighten the bolt nut and washer Repeat the same procedure with the other crank body then recheck the crank body alignment See next page for details Note These tables are provided as a guideline onl...

Page 18: ...derside of the base bar weight and the top surface of the calibration weight support Repeat the shimming procedure until the lifting pads raise the calibration weights at least 10mm 0 38 above the calibration weight supports Tighten the torque shaft bolts and the crank body mounting bolts then recheck all clearances The MWL installation is now complete Underside of base bar weight 10mm 0 38 minimu...

Page 19: ...eted the scale calibration procedure turn the crank handle until the lifting pads are fully raised Storing crank handle Remove the crank handle and store it See next page for details Note To ensure accurate calibration you must keep the area between the MWL lifting pads and the calibration weights clear of buildup during the calibration routine See Maintenance procedures on page 19 Lifting pads do...

Page 20: ...ing ball pin tethered to the crank body nearest to the handle to secure the MWL from unintended use and to store the crank handle Insert the locking ball pin through the hole in the crank handle and into the insertion point in the center of the crank body Two clips on the side of the crank body help to hold the handle in position Cover the input shafts with a guard if they present a hazard to pers...

Page 21: ...ce of the calibration weight supports between the calibration weights and the conveyor scale 3 Check inside the MWL crank body and inspect the worm gear drive if material has accumulated here remove it with an air stream or other suitable device Greasing On both crank bodies the teeth of the drive plate are greased at the factory They should not require further greasing for a number of operations ...

Page 22: ...Drawing for the MUS STD Standard Duty Belt Scale 133mm 5 22 214mm 8 43 516mm 20 30 Belt Width 229 mm 9 or to suit 14mm 0 56 dia holes typ Base bar weight centered on guide pin 10mm 0 38 minimum clearance from vertical arm to weights Belt Width 229 mm 9 or to suit Belt Belt MWL48all fm Page 20 Tuesday June 12 2001 8 23 AM ...

Page 23: ...fitting an MUS HD Heavy Duty Belt Scale See next page for details C 10mm 0 38 minimum clearance from vertical arm to weights Base bar weight centered on guide pin 608mm 23 92 246mm 9 67 133mm 5 22 Belt width 229mm 9 or to suit Belt width 229mm 9 or to suit 14mm 0 56 dia holes typ Belt Belt MWL48all fm Page 21 Tuesday June 12 2001 8 23 AM ...

Page 24: ... base bar weight and the flat bar calibration weights Replace the existing idler clamping brackets with the new idler clamping brackets one at a time re using the existing bolts nuts and washers Tighten the nuts securely while ensuring that the clamping brackets remain parallel to the run of the conveyor stringers Please see the MUS instruction manual for further details MWL48all fm Page 22 Tuesda...

Page 25: ...ith the MWL to replace the existing calibration weight bar New bolts are supplied but you will also need a C clamp metric Allen keys and metric wrenches Base bar weight centered on guide pin 12 5mm 0 5 minimum clearance from vertical arm to weights 133mm 5 22 265mm 10 42 14mm 0 56 dia holes typ Belt width 229mm 9 or to suit Belt width 229mm 9 or to suit Belt Belt MWL48all fm Page 23 Tuesday June 1...

Page 26: ...e two socket head cap screws that secure the calibration weight bar then remove the calibration weight bar from the dynamic beam of the belt scale Note Take care to protect the load cells from impact or prying forces during installation of the new calibration weight brackets Shipping stop in free position Shipping stop in free position Screws A Screws B Bolts step 6 Idler removed Calibration weigh...

Page 27: ... hand tighten the nuts 7 Align the new calibration weight brackets with each other vertically and horizontally 8 Tighten the nuts and bolts firmly to secure all four brackets Torque value 54 6 Nm 40 ft lbs 9 Remove the C clamps 10 Re install the idler and check idler alignment as described in the Belt Scale Instruction Manual 11 Free the weighing mechanism loosen screws A and rotate the 2 shipping...

Page 28: ...Page 26 Milltronics Weight Lifter MWL Instruction Manual 7ML19981CR01 MWL48all fm Page 26 Tuesday June 12 2001 8 23 AM ...

Page 29: ...___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ Grand Total ________...

Page 30: ...ystem has been pre calibrated as in the case of an MWL retrofit the belt scale system should be zeroed The Factor function of the Integrator should be used to accurately determine the value of the calibration weights in terms of the existing span calibration See the Integrator manual for more detail MWL48all fm Page 28 Tuesday June 12 2001 8 23 AM ...

Page 31: ... 7ML19981CR01 ...

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