NC -368 : X axis - Serial Data Error (INT)

     The probable causes for this alarm to occur are

               1. Noise

               2. Failure of pulse coder

               3. Broken cable for feedback signal

     Guidance to check the cause:

 1. First check is the interpolation counter (DGN No. 356) is more than 5

 2. If it is more than 5, the alarm is effect of noise. ( In this case noise means a disturbance occurred in the process of signal transfer from pulse coder to amplifier). Probable cause is shielding check the shielding of the cable.

 3. If the DGN No. 356 is not more than 5, then check for the communication alarm counter (FC3D) and (FC5D) more than 3 or not.

 4. If it is more than 3 means the communication cable it self has a problem. check the communication cable with the following drawing. (The cable is A66l-0001-0286 or A660-2005-T505)

                    

              The one end of the cable is PCR-E20FS which is connected to the amplifier unit at port name JF1 ECR and the other is JAE (MODEL : A06B-6114-K200/s) connected to the pulse coder at motor end.

LEADWELL LCV - 760

                                          Leadwell is worlds top manufacturer of CNC machines. Leadwell's LCV 760 is a V Series, Vertical machining center controlled by FANUC Oi-MC controller

• This LCV 760 is ultimate in performance and more powerful
• It consists Powerful spindle motor (Upto 10000 rmp)
• Massive cast iron base for extra stability
• Wide column design for extra rigidity
• Rapid rates are upto 36 min
• Icresed capacity of X travel from 510 mm to 2040 mm
• Tab;e size from 600x350mm to 2100x1000mm

The technical specifications of Leadwell LCV 760 are as follows

ITEM	UNIT	LCV-760
Capacity
X axis travel	mm	760
Y axis travel	mm	610
Z axis travel	mm	610
Distance from spindle nose to table surface	mm	110-720
Distance from spindle nose to column surface	mm	718
Table
Table size (LXW)	mm	850x600
Max. table lad weight	kg	800 Fix
Spindle
spindle speeds	rpm	10000
Spindle nose (normal size.No)		7/24 Tapper,No.40
Spindel Bearing Inner Diameter	mm	70
Feedrate
Rapid travese X	M/min	32
Rapid travese Y	M/min	32
Rapid travese Z	M/min	28
Max. cutting feedrate	M/min	10
A.T.C
Tool storage capacity	pcs	30
Max. Tool Diameter	mm	100
Max. tool length	mm	250
Tool change time(T-T/C-C)	sec	10-Mar
A.P.C
Number of pallets	pcs	2
Pallet changing time	sec	12
Motors
Spindle motor FANUC	kW	18.5
X axis feed motor	kW	7
Y axis feed motor	kW	4
Z axis feed motor	kW	4
Machine size
Height of machine	mm	2980
floor space(LXW)	mm	3320x4800
Total machine weight	kg	10500
Power requirement	KVA	50
Computer control	FANUC	Oi-MC

SPINDLE HEADSTOCK ASSEMBLY

                     The Spindle Head Stock is solid supporting assembly which holds the spindle cartridge and spindle motor. The spindle motor connected to cartridge spindle thru High Torque Drive Timing belt,main motor adjust place uses to tightening and loosening the belt. The boosting cylinder positioned on top of the spindle cartridge, these both boosting cylinder and spindle cartridge are not directly coupled. When the boosting cylinder operates the shaft of the cylinder enlarges to push the cartridge mechanism to open the 'collet' this opening cause to unclamp the tool and closing cause to clamp.

                     This full assembly (Spindle Head stock poisoned vertically on guide rails supported with Z - axis ball screws and spindle motor, X and Y axis takes the spindle head stock to tool working position simultaneously the spindle cartridge to move up and down on the work place with help of Z - axis. Three num of Dog switches are located on the Z - axis. These are the limits for upper limit , lower limit and emergency stop. A micro switch is connected to Z - axis to move with the axis movement.

                                              PART LIST

Pos	Description	Specification	QTY
1	SPINDLE HEAD STOCK	FC-25	1
2	LM BLOCK	S45C	3
3	SHIM	SS41	6
4	SPINDLE HEAD STOCK	MV-40	1
5	MAIN MOTOR ADJUST PLATE	356#AL	1
6	MOTOR PULLEY	48T	1
7	SPACER	S45C	1
8	MOTOR SHAFT END CAP	SS41	1
9	H.T.D. BELT	1248-8M-50	1
10	SPINDLE HEAD STOCK COVER	2t	1
11	TUBE BUNDLE	AL	2
12	I TYPE INSERTING JOINT	3/4'' PT-34''	1
13	OIL DISTRIBUTOR BRACKET		1
14	MICRO SWITCH	LDS-5200K	1
16	UPPER DOG BRACKET	SS41	1
17	LOWER DOG BRACKET	SS41	1
18	HOME DOG	S45C	1
19	EMERGENCY DOG	S45C	2
21	ADJUSTABLE PLATE STOPPER	V-0	2
22	MICRO SWITCH BRACKET	4mm/SPCC	1
23	CHIP PLATE	2T/A+	1
24	DOG BRACKET PAD	3mm,SPCCB	2
25	HEAD STOCK SIDE COVER	2mm,SPCC A+	1
26	TOOL PAD	2mm,AL	1
28	COVER BACK	2mm,SPCC A+	1
30	I TYPE COPPER JOINT	CIN3/8''-1/4'' PT	4
31	T TYPE STEEL JOINT	3/8''PT	2
32	JOINT,CONDUIT PROTECTING TUBE	#68(J25BL82151,81151)	1
33	FLEXIBLE CONDUIT PROTECTING TUBE	R58,1-150	42

CARTRIDGE TYPE SPINDLE

                                                  The spindle is nothing but a drilling machines which holds a tool and performs cutting and drilling operation on work piece power by a high speed spindle motor (say 10000 rpm -This speed is fully controllable). The cartridge spindle is a heavy duty spindle allows heavy cutting and there is a over sized disc springs called "Collet" which gives the tight holding to the tool. This mechanism developed by LEADWELL using high precision P4 grade bearings reduces tool movement, improves tool life , reduces chattering and creates a better finish

PART LIST

Pos	Description	Specification	QTY
1	HEX-S.H.D. SET SCREW	M6X8mm	2
2	HEX-S.H.D. CAP SCREW	M6X16mm	2
3	SPINDLE KEY	SCM21	2
4	DUST PROOF RING	S45C	1
5	HEX-S.H.D. CAP SCREW	M6X25mm	8
6	END NUT SPINDLE	SCM440	1
7	O RING	G110	1
8	HEX-S.H.D. SET SCREW	M6X8mm	1
9	FRONT SPACER	OD=102,ID=70,X15.5L	1
10	COLLET/GRIPPER	MAS P40T-01	1
11	SPACER	OD=110,ID=83,X45L	1
12	SPACER	ID=82,ID=70,X15L	1
13	SPINDLE ANGULAR CONTACT BALL BRG	FAGHS7014CTP4UL	4
14	MEDIA SPACER	OD=83,ID=70,X15L	1
15	LOCK NUT	YSF-M70XP2.0	1
16	GRIPPER TYPE DRAW BAR	SCM440	1
17	SPACER	OD=32,ID=16,X5T	2
18	DISC SPRING	31.5X16.3X2.0T	28
19	SPINDLE	SNCM21	1
20	SPINDLE BEARING	FAGB7012C2RSDTP4SUL	2
21	QUILL	SCM440	1
22	HEX-S.H.D CAP SCREW	M6X12mm	4
23	COVER	S45C	1
24	SPACER	OD=70,ID-60,X22L	1
25	PULLY,SPINDLE	10000RPM 38T	1
26	DOUBLE ROUND ENDS KEY	8X7X60L	2
27	LOCK NUT	YSR-M55XP2.0	1
28	PULLING BAR	S45C	1
29	PULL BAR STOPPING RING	S45C	1
30	HEX-S.H.D. CAP SCREW	M5X15mm	6
31	WEARING RING	S-55904	1
32	LOCK NUT		1
33	ORIGINAL WHEEL	S45C	1
34	O RING	P22	2
35	SHIM	SCM440	1
36	HEX-S.H.D. SET SCREW	M3X8mm	2

WORKING /OPERATION:

                                    The spindle mechanism consists collet which operates by a boosting cylinder (a pneumatic cylinder).When the boosting cylinder is activated by air its plunger enlargement causes spindle collet to open and it release the tool (At this same operation air release inside the collet to clean). At the top of the boosting cylinder there is a adjusting bolt to adjust the opening of the collet. During the auto operation at the time of tool changing all the axis moves to tool change position, Automatic tool changer (ATC) door open and ATC motor energizes until complete one cycle of operation starting from home position .ATC consists double handed arm one arm holds unclamped tool from spindle and the other takes tool from magazine for the next operation and inserts in spindle.

TRANSMISSION ASSEMBLY Z - AXIS

                                       The z - axis gives the top and bottom moving support to the spindle head stock.The overall length of the Z - axis ball screw is 1520 mm. and the travelling distance 610 mm. The guides used for all the axis transmission assemblies are high speed linear motion guides by which the power consumption is less and precision movement is achieves.

                                        Also the ball screws are accurately aligned parallel to the guide ways and anchored at both ends. These ball screws are pre-tensioned this improve the machine stiffness,this also achieves accuracy. All X,Y and Z high speed ball screws are lubricates with automatic lubrication system  to improve the life.

Fig. LCV 760 Axis Assembly

	PART LIST
Pos	Description	Specification	QTY
1	BEARING HOUSING	S45C	1
2	BEARING HOUSING	S45C	1
3	BALL SCREW	Φ 45XP16X1210L	1
4	BEARING COVER	S45C	2
5	SPACER	S45C	1
6	SPACER	S45C	1
7	BEARING SPACER	S45C	1
9	SPACER	S45C	2
11	RUBBER	MV-40	2
12	COVER Y AXIS TRANSMISSION SEAT	1.6mm,SPCC A+	1
13	SHIM	S45C	1
14	SHIM ,Y AXIS MOTOR	SS41	1
16	LOCK NUT	SCM440	2
19	ANGULAR CONTACT BALL BEARING	30TAC62B(SU)NSK	7
20	L TYEP RAPID JOINT (R 1/8 Φ 4mm)	L-1/8"PT-Φ 4-A	3
21	O RING	G25	4
22	O RING	36X45.3X3.2TG3100360	4
23	OIL SEAL	VC42556	2
24	COUPLING	WTM-05.A-Φ 28/Φ 35	1

TRANSMISSION ASSEMBLY - Y AXIS

                                           The X - axis transmission assembly consists of a ball screw and a servo motor. The Y - Axis moves moves vertically (say 90 °) to the X - axis.The Y - axis is positioned between X - axis and the travelling column and is operated by a directly coupled servo motor whose movement is commanded by a servo amplifier. The travel distance of Y -axis is 610 mm, and the overall length of the ball screw is 1210 mm

	PART LIST

Pos	Description	Specification	QTY
	L TYEP OIL JOINT	1/8"PT-M10-Φ 6	5
1	BEARING HOUSING	S45C	1
2	BEARING HOUSING	S45C	1
3	BALL SCREW	Φ 45XP16X1210L	1
4	BEARING COVER	S45C	2
5	SPACER	S45C	1
6	SPACER	S45C	1
7	BEARING SPACER	S45C	1
9	SPACER	S45C	2
11	RUBBER	MV-40	2
12	COVER Y AXIS TRANSMISSION SEAT	1.6mm,SPCC A+	1
13	SHIM	S45C	1
14	SHIM ,Y AXIS MOTOR	SS41	1
16	LOCK NUT	SCM440	2
19	ANGULAR CONTACT BALL BEARING	30TAC62B(SU)NSK	7
20	L TYEP RAPID JOINT (R 1/8 Φ 4mm)	L-1/8"PT-Φ 4-A	3
21	O RING	G25	4
22	O RING	36X45.3X3.2TG3100360	4
23	OIL SEAL	VC42556	2
24	COUPLING	WTM-05.A-Φ 28/Φ 35	1

TRANSMISSION ASSEMBLY X - AXIS

                          The X - axis transmission assembly consists of a ball screw and a servo motor. The Ball Screw is a mechanical linear actuator which transmits rotary motion to linear motion. The X axis bears the total weight of the travelling column, including Y axis linear motion guide assembly and Spindle head stock. A servo motor is directly coupled to the ball screw which controlled by a servo amplifier, by which the movement of the X axis (say horizontal movement of the travelling column) is possible through Spindle motor.The total assembly rests on two guide rails with linear guide roller bearings by which free movement possibles. The travel distance of X -axis is 760 mm and the overall length of the ball screw is 1520 mm

Fig . Machine Axis Assembly

	PART LIST

Pos	Description	Specification	QTY
1	BEARING HOUSING	S45C	1
2	BEARING HOUSING	S45C	1
3	BALL SCREW	Φ 45X1520XP16	1
4	BEARING COVER	S45C	2
5	SPACER	S45C	1
6	SPACER	S45C	1
7	BEARING SPACER	S45C	1
9	SPACER	S45C	2
11	RUBBER TOPPER		2
12	COVER X AXIS TRANSMISSION SEAT	1.6mm,SPCC A+	1
13	SHIM	S45C	1
14	SHIM ,X AXIS MOTOR	SS41	1
16	LOCK NUT	SCM440	2
19	ANGULAR CONTACT BALL BEARING	30TAC62B(SU)NSK	7
20	L TYEP RAPID JOINT (R 1/8 Φ 4mm)	L-1/8"PT-Φ 4-A	3
21	O RING	G25	4
22	O RING	36X45.3X3.2TG3100360	4
23	OIL SEAL	VC42556	2
24	COUPLING	WTM-05.A-Φ 28/Φ 35	1