FANUC experts Hello: I have a horizontal machining center in the operation of the 930AL and CRT display bar code, re-power off and on after all the parameters are lost. Then enter the parameters in the boot state machine can run normally. I don't know why? I would like to ask for your support and help. I would like to thank you for your support and help.
A: The sudden loss of parameters, may be related to the memory board, battery or external interference, 930 also indicates that there may be external interference caused by the CPU does not work properly, the system alarm. It also does not exclude the motherboard or other PCB failure.
2, 926 alarm (18i)
Thank you for your reply to my first two queries. Now another machining center appeared 926 alarm, after the control system on the LCD in addition to the alarm message, no display (at that time the temperature inside the electronic control cabinet is high), I do not know why, I hope to answer. Thank you!
Answer: 926 alarm (FSSB alarm) cause and treatment of the FSSB (servo serial bus) connected to the CNC and servo amplifier failure. This alarm occurs if there is a problem with the FSSB that connects the axis control card, the fiber optic cable, and the servo amplifier.? Confirm the fault location using the LED judgment on the servo amplifier. The location of the fault can be confirmed using the 7-segment LED on the servo amplifier? Servo amplifier power supply If the power supply of one of the servo amplifiers fails, the FSSB alarm occurs. The FSSB alarm is triggered by a power supply failure due to a drop in the control power supply voltage of the amplifying faulty instrument, or grounding of the +5V of the encoder cable, or other reasons.? Replace the axis control card If a faulty axis control card is diagnosed by the above measures, replace the axis control card on the main CPU board.
3, alarm (0imate-B)
Hello: Thank you very much for your company's products to our production has brought convenience, recently one of my company's lathe often appear 920, 911, 930 alarm, of which 930 most, please provide technical support. I will be grateful. Address; Binzhou City, Shandong Province, Huimin County Piston Company
Answer: 911SRAMPARITY: (BYTE1) parity error in part of the program storage RAM. Fully clear the RAM, or replace the SRAM module or motherboard. Then reset the parameters and data.920SERVOALARM (1-4AXIS) This is a servo alarm (first through fourth axes). A monitoring alarm or a RAM parity error in the servo module has occurred. Please replace the servo control module on the motherboard 930CPUINTERRUPTCPU alarm abnormal interruption. Bad motherboard or CPU card. You can confirm the faulty part by exchanging parts, in addition to machine grounding, external interference must also be noted
4, parameters can not be rewritten (BJ-FANUCOi-MB)
Hello, my company has a new machine for the Far Eastern machine made in Taiwan, the new machine is loaded, try the machine, and found that the B-axis can not be returned to zero, when the B-axis turned to return to zero switch began to decelerate, but the turn Not long will appear 90 alarm, can not return to zero, do not know what is the reason, please help! Please help!
Answer:Alarm No.90 means: when not satisfied? In the direction of returning to the reference point, to return to the reference point at a speed equivalent to the position deviation (DGN.300) is greater than 128 pulses, the CNC at least once received a 1-turn signal conditions for returning to the reference point, this alarm occurs. Check: 1. return to zero speed. 2. one-turn signal?
5, machining centers (FANUC-18iM)
Machine tools in a period of time after stopping the power on, there is an alarm: 701: OVERHEAT: FANMOTOR investigated that the alarm for the CNC system cooling fan failure, but after checking the fan found to be running normally, the alarm has been unable to eliminate away. In the end, the only parameter 8901 #0 from "0" to "1", blocking the alarm. I hope this will help solve the problem, thanks!
A: The fan is broken, but it can still rotate, so you can only buy a new one to replace it.
Frequently Asked Questions
6, machine alarm (FANUC-18)
After the spindle overload machine alarm, alarm number 751, spindle servo module alarm number AL-73 please ask how to repair.
A: The motor sensor signal is disconnected. (1) Alarm occurs when the motor excitation is turned off (a) The parameter setting is wrong Confirm the sensor setting parameter. (b) The cable is broken, please replace the cable. (c) Sensor adjustment error Check the sensor signal adjustment. If adjustment is not possible or the signal cannot be detected, replace the connecting cable and sensor. (d) SPM malfunction Replace the SPM or SPM control printed circuit board. (2) If an alarm occurs when the cable is touched (spindle operation, etc.), the wire may be broken, so replace the cable. If there is cutting oil intruding into the connector part, please clean it (3) Alarm occurs when the motor is rotating (a) Cable shielding treatment between the sensor and SPM Failure Confirmation of cable shielding treatment. (b) Power cable with servomotor is tied together If the cable from the sensor to the SPM is tied together with the servomotor power cable, tie them separately.
7, 351 alarm (Oi-M)
A machining center, OI-M system, NC control X, Y, Z, B4 axes, B-axis for rotary axis. Failure phenomenon: in the processing, there are 351 alarms, and all in the N5H6Z344.2 program section, but there is no B-axis work instructions in this section. After the failure, the 4-axis module are "-" display. After re-powering, it was normal, but after working for some time, the fault appeared again. Now it occurs 2-3 times per shift on average. Solution: Through the diagnostic screen 0203 # 5 # 6 for 1, the scope of the problem is 1: signal cable connection is bad; 2 encoder, motherboard, servo module hardware is bad. Because after restarting once can temporarily rule out the fault, can rule out 1. For 2, we encoder, motherboard, servo module plug re-inserted once, nothing effect, the fault is still there. Please analyze, what we should do next
A: mainly from the 1 place to check, and the signal cable, check the alarm axis of the signal cable, to see at what time there is movement (often in the other axis of the mobile, the axis of the cable is dragged). If the cable is folded over and over for a long time, the contact will be bad, and the alarm will appear irregularly. This time can only be replaced with a new cable.
8, 408 # and 409 # at the same time alarm processing (FANUC0MD)
Machine tools appear 408 and 409 alarms for several reasons, please advise
Answer: Generally unlikely to appear at the same time, 408, 409 alarms. 408 is a bad communication is between the spindle amplifier and the system (memory board) can not communicate. Generally, the spindle amplifier is no power, or the interface is bad 409 alarm, is the spindle amplifier alarm number. The specific alarm number is displayed on the amplifier.
9, fan (0i-mate-TB)
System appeared "611, 9113" alarm, after checking the power module cooling fan does not rotate, replace the other normal operation of the fan after normal operation. Confirm that the fan is bad. Purchase the same type of fan replacement still appear after the above alarm (fan normal operation), after checking the fan although the same manufacturer, but the current compared to the original 0.1A 0.03A, and then with the spindle drive module on the implementation of the fan alignment, no longer appear "611, 9113" alarm, but the "611, 9113" on the CRT. CRT appears "FAN" flashing, does not affect the processing. Q. Is it possible that the fan is not detected by a thermistor or other detecting element, but only by the amount of current?
A: It is best to buy the same type of fan CRT on the "FAN" flashes because the spindle drive module on the heatsink there is an external fan problem
10, 971 alarm! (BJFANUC0i-MateTB)
The machine tool for the Shenyang Machine Tool Works production of CAK6150D CNC lathe, in the automatic operation of the process of frequent 971 alarm, turn off the CNC and then turn on, the alarm eliminated! Please guide the maintenance ~!
A: It may be that the power supply or connecting wire of the I/O card is loose.
11, please ask the FS21T system of 506, 507 alarm indicates what (FS21T)
One of my company's FS21T system of CNC lathe power on that alarm 506, 507, please ask the FS21T system of 506, 507 alarm indicates what, how to solve?
Answer: 506OVERTRAVEL:+nExceededthen-thaxis+sidehardwareOT.507OVERTRAVEL:-nExceededthen-thaxis-sidehardwareOT.Does hardware overtravel occur at the same time?
12, position display (FANUC-0M)
Position display failure, the position display from the original three decimal places to four A: parameter modification: No.0001#0SCW1 changed to 0 can be
Pursuing: In looking for the point 。。。。 Too little. Answer:
1, the use of appropriate and reasonable method of tool setting
Tool installation, in the implementation of the machining program before the first to carry out tool setting to determine the starting point position. The tool is often a headache for the operator (economic CNC no self-testing device), labor-intensive and time-consuming, especially when more than one knife processing, but also need to measure the value of the tool patch. Usually, the commonly used tool setting methods are:
Pointing to the tool method
Press and hold the control panel on the pointing key, the tip of the tool will lightly touch the surface of the part being processed (X and Z two directions in two points), the counter is cleared to zero, and then back to the initial position of the initial position needs to be set (X, Z design value), and then cleared to zero, to get the initial position of the knife. Determine the initial position of each knife in turn, and then adjust to the exact design position (starting point) after trial processing. This method does not require any auxiliary tools, hand can be operated, but the time is longer, especially every grinding tool must be re-adjusted once.
This method is suitable for simple processes or initial installation and commissioning.
The use of knife instrument method The machine tool instrument is equipped with optional self-testing device, but the operation is complex, still have to spend a certain amount of preparation time. Suitable for multiple knife measurement.
The use of CNC tools
Tools installed by the initial positioning, after a period of time after cutting wear and tear and need to sharpen, ordinary tool sharpening and re-installation of the tip of the tool position changes, the need to re-align the tool. The CNC tool is characterized by high precision tool manufacturing, blade indexing repeat positioning accuracy of about 0.02mm, greatly reducing the time of tool setting: at the same time, the blade surface coated with wear-resistant layer (SiC, TiC, etc.), so that its durability greatly improved (3 to 5 times), but the cost is higher.
Using homemade knife block method
Made of plastic, plexiglass and other simple knife block, can be easily realized after tool sharpening repeat positioning, but the positioning accuracy is poor, usually in the 0.2 ~ 0.5mm, but still not lost as a fast positioning method, and then adjusted again very quickly and easily.
2, the processing of spherical surface prone to shape error elimination method
In the processing of spherical surface, especially the processing of the quadrant of the ball, surface, due to improper adjustment, it is easy to produce a convex shoulder, shovel back and so on. The main reasons are:
System gap caused
In the equipment transmission vice, there is a certain gap between the screw and the nut, with the growth of the equipment into operation time, the gap due to wear and tear and gradually increase, so the corresponding gap compensation for the reverse movement is to overcome the main factors of the machining surface to produce convex shoulder. Gap measurement is usually taken with the percentage meter measurement method, the error control within 0.01 ~ 0.02mm. It should be pointed out here is that the table base and the table should not extend too high and too long, because the measurement of the cantilever is long, the table base is easy to move by force, resulting in counting is not allowed, the compensation value is not true.
Uneven workpiece machining allowance caused by
In the realization of the surface of the part design before the surface to be machined is also caused by the machining of the surface to be machined whether the surface of the molded surface can meet the design requirements of an important reason, because of uneven machining allowance is easy to cause a "double reflection" error. Therefore, the surface shape of the higher requirements of the parts, in the molding should be as far as possible to achieve uniform machining allowances or through the processing of more than one method to achieve the design requirements of the profile.
Improper tool selection caused
The tool in the cutting is through the main cutting edge to remove the material. However, in the arc machining quadrant, the arc and the tool vice cutting edge (vice behind the intersection of the line with the base surface) after the tangent, after the vice cutting edge may be involved in cutting (that is, shovel back). Therefore, when selecting or sharpening the tool, be sure to consider the wedge angle of the tool.
3, the rational design of the machining process
The use of CNC machining equipment for processing, high efficiency, good quality, but if the process design is not properly arranged, it can not well reflect its advantages. From the use of some manufacturers processing, there are a number of problems as follows:
The process is too decentralized
The reason for this problem lies in the fear of the busy (refers to the preparation time), programming is simple, simplify the operation of the processing, the use of a knife machining is easy to adjust the right knife, accustomed to ordinary processing.
This results in product quality (positional tolerance) is not easy to ensure that production efficiency can not be well played. Therefore, the process staff and operators should be fully familiar with the knowledge of CNC machining, more attempts to master the relevant knowledge, as far as possible, the use of process-centralized method of machining, more than a few times, it will naturally reflect its advantages. After adopting the process concentration, the unit processing time grows, we will arrange the two machines face to face, realizing one person to operate two machines, the efficiency has been greatly improved, and the quality is also well guaranteed.
Processing order is unreasonable
Some operators take into account the preparation of some of the problems, often the processing order is extremely unreasonable. CNC machining is usually processed according to the general requirements of machining process preparation, such as the first coarse after fine (tool change), first inside after outside, a reasonable choice of cutting parameters, etc. In this way, quality and efficiency can be improved.
Careful use of G00 (G26, G27, G29) rapid positioning instructions
G00 instructions to programming and use has brought great convenience. However, if set and used improperly, often caused by the speed setting is too large to produce back to zero when overshooting, precision degradation, equipment guide surface strain and other undesirable consequences. Return to zero route is not careful, easy to produce collision workpiece and equipment safety accidents. Therefore, when considering the use of G00
instruction, should be well thought out, not arbitrary.
In CNC machining, in particular, attention should also be paid to strengthening the program retrieval and trial run. After the program is entered into the control system, the operator should use the SCH
key and ↑, ↓, ←, → move the key for uncertainty and certainty retrieval, if necessary, to modify the program to ensure the accuracy of the program. At the same time, before the formal implementation of the program processing, must go through the program trial run (open the amplifier) to confirm that the processing route is consistent with the design route.
The above is the use of CNC machining equipment, some common problems and solutions. In practice, there may be other problems, but as long as the engineers and technicians and operators brainstorming, carefully master the knowledge and skills of CNC, CNC equipment can be very good for the enterprise to play the greatest benefits. First, Q: How to divide the machining process? A: CNC machining process can be generally divided according to the following methods: (1) tool focused sub-sequence method
It is the tool used to divide the process, with the same tool to complete the processing of all parts on the part can be completed. In the second knife, the third to complete them can be completed in other parts. This reduces the number of tool changes, compressed air time, reducing unnecessary positioning errors. (2) to the processing part of the sequential method
For the processing of many parts, according to its structural characteristics of the processing part into several parts, such as internal shape, shape, surface or plane. Generally, the first processing plane, positioning surface, and then processing holes; first processing of simple geometric shapes, and then processing of complex geometric shapes; first processing of lower precision parts, and then processing of higher precision requirements of the parts. (3) to roughing and finishing sub-processing method
For parts susceptible to machining deformation, due to the deformation that may occur after roughing and need to be calibrated, so generally speaking, where roughing and finishing are to be separated from the process. In summary, in the division of the process, must be depending on the structure of the parts and process, the function of the machine tool, the number of parts CNC machining content, the number of installations and the organization of the unit's production flexibility. Another suggestion is to use the principle of process concentration or the principle of process decentralization, according to the actual situation to determine, but must strive to be reasonable. Second, Q: processing order should be arranged in accordance with what principles? A: The machining sequence should be arranged according to the structure of the parts and the condition of the blank, as well as the need for positioning and clamping to consider, focusing on the rigidity of the workpiece is not destroyed. Sequence should generally be carried out in accordance with the following principles: (1) the processing of the previous process can not affect the positioning and clamping of the next process, interspersed with general-purpose machine tool machining processes should also be considered. (2) The first internal cavity plus process, followed by the shape of the machining process. (3) to the same positioning, clamping mode or the same knife machining process is best to connect to reduce the number of repetitive positioning, the number of times the tool change and the number of times to move the pressure plate. (4) in the same installation of multiple processes, should be arranged first on the workpiece rigidity of small damage to the process. Third, Q: workpiece clamping mode should pay attention to the determination of the aspects? A: In determining the positioning reference and clamping program should pay attention to the following three points: (1) strive to design, process, and programming calculations of the benchmark unity. (2) minimize the number of clamping, as far as possible to achieve a positioning can be machined after all the surfaces to be machined. (3) Avoid the use of occupation machine manual adjustment program. (4) fixture to open and smooth, its positioning, clamping mechanism can not affect the machining of the tool (such as collision), encountered such cases, can be used with a vise or add a base plate to pump the screws of the clamping method. Fourth, Q: How to determine the tool point is more reasonable? What is the relationship between the workpiece coordinate system and programming coordinate system? 1, the tool point can be located in the processed parts, but note that the tool point must be the reference position or has been finishing parts, sometimes in the first process after the tool point is destroyed by the processing, will lead to the second process and after the point of no way to find the tool point, therefore, in the first process of tool setting, pay attention to be in the locating datum and have a relatively fixed size of the relationship between the establishment of a relative position of the tool so that according to the relative position of the relationship between them This can be based on the relative position between them to find the original tool setting point. This relative to the tool position is usually located on the machine table or fixture. Its selection principles are as follows:
1) easy to find the right. 2) easy to program. (3) small tool setting error. (4) easy to check the processing, reliable. 2, the origin position of the workpiece coordinate system is set by the operator himself, it is in the workpiece clamping is completed, through the tool setting to determine, it reflects the distance between the workpiece and the zero point of the machine tool position relationship. Once the workpiece coordinate system is fixed, generally do not change. Workpiece coordinate system and programming coordinate system must be unified, that is, in the processing, workpiece coordinate system and programming coordinate system is consistent.
V. Q: how to choose the route of the tool? Tool route is the index control machining process of the tool relative to the machined part of the trajectory and direction. The reasonable choice of machining route is very important, because it is closely related to the machining accuracy and surface quality of parts. In determining the tool route is the main consideration of the following points:
1) to ensure that the machining accuracy requirements of the parts. (2) to facilitate numerical calculations, reduce programming workload. (3) seek the shortest machining route to reduce the empty knife time to improve machining efficiency. 4) Minimize the number of program segments. (5) to ensure that the roughness of the workpiece contour surface machining requirements, the final contour should be arranged for the last tool continuous machining out. (6) tool in and out of the knife (cut in and cut out) route should also be carefully considered to minimize the contour of the stop (cutting force caused by a sudden change in elastic deformation) and leave a knife mark, but also to avoid the contour of the surface of the vertical down the knife and scratch the workpiece.
VI. Q: How to monitor and adjust during machining? Workpiece in the alignment and program debugging is completed, you can enter the automatic machining stage. In the automatic machining process, the operator should monitor the process of cutting to prevent abnormal cutting resulting in workpiece quality problems and other accidents.
Monitoring of the cutting process is mainly considered in the following areas: 1, monitoring of the machining process
Rough machining is mainly considered to be the surface of the workpiece excess residue of rapid removal. In the automatic machining process, according to the set cutting amount, the tool automatically cuts according to the predetermined cutting trajectory. At this time, the operator should pay attention to the cutting load table to observe the automatic machining process of the cutting load changes, according to the status of the tool's tolerance, adjust the cutting amount, to play the maximum efficiency of the machine tool.
2, the cutting process of cutting sound monitoring
In the automatic cutting process, the general start of cutting, the sound of the tool cutting the workpiece is stable, continuous, brisk, at this time the movement of the machine tool is smooth. With the cutting process, when the workpiece has a hard point or tool wear or tool feed clip and other reasons, the cutting process appears unstable, unstable performance is the cutting sound changes, the tool and the workpiece will appear between the sound of mutual impact, the machine tool will appear vibration. At this time should be adjusted in a timely manner cutting dosage and cutting conditions, when the adjustment effect is not obvious, should pause the machine tool, check the status of the tool and workpiece.
3, finishing process monitoring
Finishing, mainly to ensure that the workpiece machining size and surface quality, cutting speed is higher, larger feed. At this time should pay attention to the impact of chip tumors on the machined surface, for cavity processing, should also pay attention to the corner of the machining of overcutting and let the knife. For the solution of the above problems, one should pay attention to adjusting the spray position of the cutting fluid, so that the machined surface is always in the best] cooling conditions; the second is to pay attention to the observation of the workpiece has been machined surface quality, through the adjustment of cutting dosage, as far as possible to avoid changes in quality. If the adjustment is still no obvious effect, it should stop the machine to check whether the original program is reasonable.
Special attention is paid to the pause in the check or stop the check, pay attention to the position of the tool. If the tool stops in the cutting process, the sudden spindle stop, will make the surface of the workpiece to produce knife marks. Stopping should generally be considered when the tool leaves the cutting state.
4, tool monitoring
The quality of the tool largely determines the quality of the workpiece processing. In the automatic machining cutting process, through the sound monitoring, cutting time control, cutting process pause check, workpiece surface analysis and other methods to determine the normal wear condition of the tool and abnormal breakage conditions. According to the processing requirements, the tool to deal with timely, to prevent the occurrence of processing quality problems arising from the tool is not dealt with in a timely manner.
Seven, Q: how to rationally select the processing tool? Cutting dosage has several elements? There are several materials of cutting tools? How to determine the rotational speed of the tool, cutting speed, cutting width?
1, plane milling should be selected without regrinding carbide end mill or end mill. General milling, as far as possible, the use of secondary tooling processing, the first tooling is best to use the end milling cutter rough milling, continuous tooling along the surface of the workpiece. The width of each cutter is recommended to be 60% - 75% of the diameter of the tool.
2, end milling cutter and end milling cutter with carbide inserts are mainly used for machining the cam, groove and box mouth surface. 3, ball cutter, round cutter (also known as round nose cutter) is commonly used in machining curved surfaces and variable beveled contour profile. The ball cutter is mostly used for semi-finishing and finishing. The round cutter with carbide cutter is mostly used for roughing.
Eight, Q: what is the role of machining program? What should be included in the machining program list? (A) machining program is one of the contents of CNC machining process design, but also need to be observed by the operator, the implementation of the protocol is a specific description of the machining program, the purpose is to allow the operator to specify the content of the program, clamping and positioning methods, the various machining procedures selected by the tool should pay attention to both the problem and so on.
(ii) in the machining program, should include: drawing and programming file name, workpiece name, clamping sketches, program name, the tool used in each program, the maximum depth of cut, the nature of machining (such as roughing or finishing), the theoretical machining time and so on.
nine, Q: CNC programming to do before the preparation? A: After determining the machining process, before programming to understand: 1, the workpiece clamping
; 2, the size of the workpiece embryo ---- in order to determine the scope of the processing or whether the need for multiple clamping; 3, the material of the workpiece ---- in order to choose what kind of tooling used for machining; 4, the inventory of the tool has what ---- to avoid the lack of this tool in the processing to modify the program, if you have to use the tool, it can be prepared in advance. If the tool must be used, it can be prepared in advance.
Ten, Q: What are the principles of safety height setting in programming? A: The principle of setting the safety height: generally higher than the highest surface of the island. Or programming zero point is located in the highest surface, which can also minimize the risk of hitting the knife. XI. Q: Why do we need to do post-processing after the tool path is programmed? A: Because different machine tools can recognize the address code and NC program format is different, so the use of machine tools to choose the correct post-processing format in order to ensure that the program can be programmed to run.
Twelve, Q: What is DNC communication? (A) program delivery can be divided into two types of CNC and DNC, CNC refers to the program through the media medium (such as floppy disks, tape readers, communication lines, etc.) delivered to the machine's memory to store up the processing from the memory to call out the program to be processed. Because the capacity of the memory is limited by the size of the program, so when the program is large when you can use the DNC method of processing, because the DNC processing machine tool directly from the control computer to read the program (that is, the side of the delivery side to do), so do not suffer from the capacity of the memory is limited by the size of the memory.
(ii) cutting volume has three major elements: depth of cut, spindle speed and feed rate. Cutting volume selection of the overall principle is: less cutting, fast feed (i.e., small depth of cut, feed speed).
(C) according to the material classification, the tool is generally divided into ordinary hard white steel knife (material for high-speed steel), coated tools (such as titanium plating, etc.), alloy tools (such as tungsten steel, boron nitride tools, etc.).
Please adopt as a satisfactory answer.