Comparison between Analog and Digital Draw Frame LRSB 851

Comparison between Analog and Digital Draw Frame LRSB 851.

Autoleveller

S No	Features	Regular	Indigenous
1	Feed sliver thickness variation sensor Scanning principle: Voltages for 3,4,5,6mm gauges	Space Measuring system B90 (Rieter) Tongue and groove - Analog voltage generated	Space Measuring system B90 (Supplied by Mikrosen, Cbe) Tongue and groove Voltage recommended same as regular machines Analog voltage generated
2	Length of sliver delivered per pulse from scanning roller	5.79 mm	0.82 mm
3	Auto levelling unit Mother Board Power supply Board Memory Board Levelling Board Processor	(All supplied by Rieter) D90 P3 P44 (voltages digitally stored and delivered in FIFO method) P53 (Voltage ref given to G90).. analog 8 bit processor	(Supplied by Mikrosen) CAL 2000 Unit Includes D90, P3, P44 and P53 PCBs connected to display board Voltages digitally stored in CPU board and delivered in FIFO method. (Voltage ref given to Eco drive)..analog 16 bit processor
4	Servo amplifier	G90 (Supplied by Rieter) Voltage ref given to Servomotor The tacho ref taken from servo motor used for next pulse.	Ecodrive (Supplied by Indramat, Germany) Ref in terms of voltage, speed, torque and current given to servo motor and matching of calculated and actual speeds will be there.
5	Servo motor	DC Servo motor with brake unit (Supplied by Rieter)	AC Servo motor (Supplied by Indramat, Germany)
6	Speed sensors B91: Scanning B93: main motor Principle:	Pulse generator  (analog) 8 pulses / rev (20VAC/1000 rpm) Tacho generator (analog) (30VDC/1000 rpm) Speed voltage	Encoder (Digital) (360 pulses/rev) Encoder (Digital) (1200 pulses/rev) Speed frequency
7	Sliver wt ref.	Adaption value in B90 unit 000-999 250-750 (working range)	Sliver Weightage (SW) 350-999 425-575 (working range)
8	Point of levelling	S93 decade switch in P44 (in P44 PCB) 192-176 i.e (0-9 and A-F0	Correction point  (CP) 332-302
10	Levelling Intensity	R38 potentiometer (in P53 PCB) 0-10	Levelling intensity (LI) 0-20
			Note: SW,CP,LI are to be entered in CAL 2000 unit display.

Sliver Monitor

1	Delivery sliver thickness measurement sensor	B50 (supplied by Rieter)	B50 (Supplied by Mikrosen) Voltage recommended for 0.6, 0.9 and 1.2mm gauges remain same.
2	Sliver monitor unit	D50 (Separate unit supplied by Rieter)	No separate unit. Included in main display.

Machine Functions

1	Machine Functions	By contactors and timers	PLC controlled machine functions
2	Can changer motor	Imported gear motor	LEDL gear motor
3	Photocell at creel	One emitter and receiver for all slivers	Individual photo cell mounted along with sliver guide
4	Limit switches	_	Replaced with proximity sensors
5	Display	Veeder Root Counter (Supplied by West controls, a supplier of Rieter) Delivery speed Can content Shift Production up to 4 shifts Runtime /total time/Efficiency Manual shift change Factors to be entered for calculating Front roller dia, Dely speed, production and can content Numeric keys Security codes for changing can content, factors and programming	E600 Display (Supplied by Biejur, Swedan) Delivery speed Can content Shift production up to 7 shifts Runtime/total time/Efficiency -            Automatic shift change  Factors inbuilt in software Alpha Numeric keys Security codes for can content, A/L programming and calibration, ON.OFF, machine settings, sliver monitor settings, shift timings, display contrast and programming for password change Additional Features: U% and A% 1m CV% Control on Autoleveller settings Adjustment of display contrast. PLC Input / Output status

Mechanical

1	Mechanical drives	Same B91 drive wheels: 55 or 56/20T	Same except B91 drive wheels: 22/51T
2	Feed funnel at scanning	Ceramic coated	Two piece construction. (Stainless steel cover + stainless steel coated / polished grey casting base funnel)
3	Web guide	Stainless material	Same material mfg at LMW
4	Web guide tube	Stainless material	Same material mfg at LMW
5	Planetary wheel in differential gear box	32/16T wheels are laser welded together.	32/16T wheels are pasted together with special adhesive
6	Gas spring for doors	Imported	Local suppliers
7	Top strippers	Imported	Local suppliers
8	Coupling of servomotor with differential gear box	-	Fixing holes of servo motor shifted to match Indramat servomotor Also Flexible coupling inner dia changed to match shaft dia of Indramat servomotor.

Still Imported:

1. Coiler Plate:                      LPT coiler under trial D450 /BK 29mm

2. Dash pot                                           Imports to be continued.