Mazak 399 power cut off malfunction manual reddit. The machine behaves much better after the re-init.

Mazak 399 power cut off malfunction manual reddit. or the machine name, serial No. The machine behaves much better after the re-init. We would have to cycle the power every morning and the alarm would clear. Every couple of minutes alarm 399 power cut off malfunction apears with e-stop 2 and 3. Dec 15, 2000 · Machine (2006 410A-ll vmc) was running fine before. Sep 6, 2021 · From what I can find, it's the battery that is low. I understand you can't clear the alarm. Mar 17, 2012 · Hi all, In our company, we have 14 Mazak machines FH6000, FH4800, VCN510, VTC200, QTN200 and so on. It seems it causing the upper turret to stop right before it's about to make a cut. Advertisement. Turn power off and then back on. Toutes les deux minutes, l'alarme 39… Something in the PLC never gets the "finish" signal from the external tool change device (or the ATC macro) so the PLC alarms out. The ones I have seen are 110 v)and see what happens. Alarm & Parameter Manual for Mazatrol M-32 Series Publication # C731SA0551E 5/95 CAUTION: • This manual is published to assist experienced personnel in the operation, maintenance and/or programming of Mazak machine tools, and is not intended to be used as training documentation. I will try to figure out what happened to the encoder. Feb 16, 2010 · Mazak QT8 T32-2 Alarm 224 Chuck Sensor Malfunction then take the chuck off and clean it. but since its the same tool number it should be ok. it is a Mazak Nexus 200 Any help?? CNC Machine Related Electronics > Mazak Nexus 200 - Battery Malfunction Alarm Dec 5, 2015 · Also look for a lever that sticks out of the fan cover. Seeing if anyone know a lot about Mazak machines and their alarms. C52012 from Mitsubishi) and install it with the POWER ON. A. Just put the tobacco in the coffee grinder or food processor and run it for a very short period (if you cut it down too much your cigarettes will be hard as a rock and you can’t even draw on them) you’ll I sure don’t have any videos. The drive varies the frequency to vary the speed of the motor. Then the alarm was back and the machine refuses to home. The hydraulic system is working as it should. Jan 16, 2024 · Mazak's Tech Tips are here to help laser-cutting customers with quick reference sheets on ways to maximize laser performance. So I do not have the parameters. I have never worked on a Mazak mill and was wondering if anyone has an opinion on them. 5. both are refurbished. 2010 View and Download Mazak MAZATROL M32 service engineer's manual online. check the 24v power supply that powers the computer, etc. The pump stays around 135 degrees all the time. Dec 3, 2013 · The idea was we would avoid issues. My shop has Mazak lathes and Haas mills. Hello, I have Mazak HQR 250MSY that's throwing a "line filter malfunction" alarm. Trouble has occurred in the hardware. Plus, manual finishing sucks. The Master warning flashed the above picture and alternated between “Malfunction” and “Malfunction See Owner’s Manual. Always keep this manual near the machinery for immediate use. 4> Page 6: Nomenclature Feb 19, 2023 · Hi everyone, This is my first post on here so hopefully I've provided the right information. Description When the front door of a CE specifications machine was opened with the setup key switch set to “O”, the electromagnetic switch for spindle power did not turn off within the required time. Similar threads. Hey guys . Machine is stuck in MDI. 1 G43. I work at a shop pt that does basic cad/cam lathe bar fed parts on 25 y/o haas and they scratch their heads at the thought of paying 2x as much for a mazak. I cancelled tool clamp interlocks which got me out of feed hold. This fixed the alarm until I power cycled the machine. There is a persistent code, 304 (F104) ATC Arm Position Malfunction, that the operating manual describes as coming in when the ATC is stopped outside of its intended position and/or the cycle has not completed after +10 seconds from when the control May 22, 2012 · its small comfort, but you dont have to remove the driveshaft to remove the mill head - just the 4 bolts and sensors/airlines under the turret cover. I am looking for a full manual for a mazak horizontal center nexus 4000-iii. It is a 1999 CNC lathe and Mazak quotes nearly 1000$ for just the downloadable copy. Look over your manuals and change all the batteries. Quelqu'un connaît les machines Mazak ? J'ai une machine Variaxis 500 5x avec des commandes Fusion 640m. I have a Mazak VCN-700D, Cat40 15k spindle, ran a 4” face I’ll for 20 minutes at 60-70% spindle load, did an M19 and the orient is off by about 4… We have an issue with our Mazak Power master fusion 640t Recently, when we start the Mazak CNC machine, the following alarm appears: 22 FEEDBACK SYSTEM MALFUNCTION (1, 0, 0025) Then we replaced the 3. Get the Reddit app Scan this QR code to download the app now. Any advise on this would be much appreciated. I believe it thinks the door remains open, and a couple guys believe it's the door parameter to the machine that needs to be changed? I'm still learning, but have you happened to run into a similar issue? Jun 26, 2024 · I have a MAZAK VTC-200B that is throwing a 31 servo malfunction alarm. The emergency stop button on the operating panel has been pressed. So when doing a tool change a stringy chip got caught in between the (capto8) tool I was changing to and I got a red 234 TOOL CLAMP SENSOR MALFUNCTION alarm. I opened the power supply unit, but couldn't find any faulty components. Page 5: Power Off Procedure POWER OFF PROCEDURE 1> Press the "LASER HIGH VOLT" OFF key ( 0 ). Machine is MAZAK Integrex i500 with smooth control. If you've tried that and it does not work, I'm sorry. I will now try getting the coupling re-aligned and see what I have then. Jan 24, 2006 · The Tech just left and took him a whole 5 minutes to free World from the possibility of nuclear weapons being made on a Mazak. From the next day, the following alarm appears: 22 FEEDBACK SYSTEM MALFUNCTION (2, 0, 0025) Feb 12, 2009 · When I turned it on today the keys at the operation panel were not working and a few minutes later Alarm 15 "System Malfunction" came up on screen. That would be a brake release. I'm getting a "Line filter malfunction" alarm, that seems to be causing the upper turret to stop moving right before it's about to make a cut. Also according to the installation tech, he said the newer mazak lathes are a little different and they don't use the interlocking pins like what I have been used to. Now It has a servo malfunction 3 that won't clear in the normal MF1 and reset route. Simply leave the power ON and order a new 3. Mazak 399 power cut off malfunction. Once the alarm appears, I have to power off the control to clear it. I recently purchased a 1999 Mazak FJV-250 with Mazatrol 640M control. Long story short , we got conned . pdf that shows someone that had the alarm on an Integrex type machine, and they apparently changed the batteries to resolve the issue. I wish all machines I run had that safety feature. 5 but those are all different things in the spectrum of TCPC. I've cleaned all the filters that I know of, and can't seem to find the location of the line filter. Feb 10, 2022 · I have a Mazak PFH - 5800 with Mazatrol 640M 80 tool unit cell, which is giving me fits. It should be number 48 INT CUT. If the pump is just idling, the relay stays nice and cool. Recently, some of the machines had servo problem and need to repair. Jun 6, 2007 · The machine has an alarm code of 399 home return unfinished (turret). One thing you can look at in diagnosis is PLC Signal. The alarm codes in the operating manual stop at number 349. . Anyone have any luck please let me know. Precautions include keeping hands away from controls after powering on, carefully checking programs and speeds, and not modifying parameters without understanding their functions. Alarm 212 is "magazine Drum Malfunction" Alarm 300 is "Magazine Shifter Pos. Or check it out in the app stores   Mazak alarm 399 power cut off malfunction upvote Instruction Manual and User Guide for Mazak Troubleshooting Guide. Feb 22, 2008 · Hi guys, I've got a Mazak SQT15MS T32-3. When I turned it on today the keys at the operation panel were not working and a few minutes later Alarm 15 "System Malfunction" came up on screen. 2. I will resume tomorrow. 020" would be a shift amount of . The screen shows the correct tool ID, but when I try to rotate the turret by hand to see if it is locked in, it feels spongy. It provides explanations of the structure of the alarm list, descriptions of the different columns in the alarm list including alarm number, message, cause, type of error, stopped status, clearing procedure and display color. C. The owner did not want that functioning so I pulled the relay. Aug 15, 2012 · No tricks really. They worked View and Download Mazak VTC-200B operating manual online. I was wondering if anybody could help me out. Jul 14, 2008 · If you're lucky enough to have the alarm occur when the machine is under power, it will be a good day. Discover the world of Roomba and iRobot robotic vacuums at r/roomba! This unofficial community-driven subreddit is your go-to destination for tips, troubleshooting, and discussions related to Roomba robot vacuums & mops. This alarm only comes on once in a while, but it’s starting to show up more 6 days ago · A. Jul 17, 2016 · Actually I inspected the MDS-B-CV-150 power supply unit. Today it popped alarm 15 during a run and during a few power shutdowns and restarts it kept coming back. I restarted several times but the same result. The turret fails to unclamp when Turret Unclamp is pushed or the turret is indexed. Oct 10, 2012 · Hey guys, I have a Mazak QT250HP, and I am getting alarm 221 Turret Clamp Sensor Malfunction). 235 Tool Index LS Malfunction Mazak QT 8 T2 I’m looking for an online copy of a Mazak Quick turn 250 manual. does anybody have a link? I get some training at my shop but want to learn more on my own time. pdf - Free ebook download as PDF File (. I have two hard alarms 20,and 204 spindle controller. Does anyone has the manual of this controller. " Before you change out that expensive coolant pump on a Mazak turret lathe, make sure this little guy isn’t clogged. Ele explica os procedimentos de preparação, operação manual, controles do painel e precauções de segurança que devem ser observadas. we have a slide hammer made up that bolts on to the face of the millhead using its cover bolt holes, since ours is quite a tight fit in its bore. The Mazak guy claims I'm doing everything right. Nov 6, 2013 · I have a couple alarms 2 emergency stop 10 detector malfunction how can I clear these alarms? machine is a 510c-ii. Thanks a lot guys. that would make the turrert index right off the part. Worst case take the fan cover off, and wind it over by hand. I believe mine has died,there were no leds lit. I teach all my tools absolute zero and I program them in a manual in a sub program and just call it up in my main. Depends what you do. Nov 7, 2015 · Check relays. Apr 24, 2009 · then when touching off with the tool eye, you have to hit the up or down arrow to 3A, 3B ect. From the next day, the following alarm appears: 22 FEEDBACK SYSTEM MALFUNCTION (2, 0, 0025) Feb 2, 2019 · We cut power and rebooted a few times to see if that would help. Apr 25, 2022 · I think the machine was powered down with a dead backup battery. I looked in the electrical cabinet and when it's started initially all the drives LED's appear correct (i. The machine starts up with an alarm 9 absolute position malfunction (&00000001, &0010) and alarm 72 servo warning (&0000009F, &0010) and if I wait a while the alarm 33 pops up with an e stop Nov 26, 2012 · After years of looking at this thing not properly aligned, I tried to remove the switch to get to the nut that holds the switch to loosen it but can't get Nov 22, 2014 · integrex 400iv machine hung just before it removed the tool from the spindle. If this does not clear the alarm status, require Mazak Technical Center or Technology Center to replace the defective hardware or cables. 6. 54. Feb 27, 2023 · I have a mazak 5-axis and it’s currently getting an alarm 33 servo malfunction 2 (&00000050, &0008). Been breaking endmills so a few tips and starting points would help me out. Any ideas as to which components the alarm is referencing? Also, this happened during a cycle, not at power up as the alarm indicates. I'm sure where there's a will, there's a way to crack the little black box's code, but unfortunately I have a business to run and now have to make up for 12 hours of lost production. My full time runs all mazak essentially, and almost all operators can program mazatrol at the machine. The tools fairly new so most of what we’ve cut I was paying very close attention to. A little off normal topic here . My machine will still let me move even with an active alarm as long as I'm using the pendant and I'm in manual jog mode. Oct 10, 2015 · We are having intermittent problems with our QT20, alarm 15 system malfunction. Sep 28, 2011 · We got a #379 Battery Malfunction Alarm (TAIL) According to the manual it says to replace the battery, but we have no idea where the battery is located at. The alarm list itself begins on page 4-1 and provides specific alarms 200 through 201 Sep 23, 2016 · With the power off I was able to move the turret a little with a dead blow and get it where it should be. the drives are flashing these codes MDS-C1-V2-3520 is showing F3, E7, F2 MDS-C1-V1-20 is showing F1,32 MDS-B-SPH-150 is showing F4, E7 now I am fairly new to all this so if there is anyone who can help me while dumbing it Mazak Alarm 376 MAIN POWER TURNING OFF MALFUNCTION Description When the front door of a CE specifications machine was opened with the setup key switch set to “O”, the electromagnetic… Mazak Alarm 375 MOTOR & SERVO TURNING OFF ERR. I gather Mazatrol has no 5 axis simultaneous functions, only 5 axis positional, so if they do much simultaneous, they're likely using EIA/ISO gcode, so you'll be using CAM. Instruction Manual and User Guide for Mazak Troubleshooting Guide. There should be a hex on top of the machine directly over the arm motor. Had Mazak make new harness with thicker coating on the wires . We replaced the main power supply and the spindle amplifier (which I assume is the drive unit) not sure though. With estop on or machine off. Other option is to find the contactor that drives the motor, and give that a jolt with an insulated screwdriver. As the program began all was fine until it made a facing cut, retracted to take another cut, then stopped above the part, the spindle coasted to a stop and I got the alarms: 20 NMI e-stop and 204 spindle controller malfunction. I've also operated a manual Bridgeport with a busted autofeed, a couple Mazak CNC CO2 Lasers, and dabbled with a Haas CNC Mill. You’ll also see various lights Illuminated; collision lights “off”, ABS, Skid, and master warning. After the system boots, the following alarm appears: “22 Feedback System Malfunction (5,0,&0025)” According to the manual for Alarm 22 ( , , 25): Cause This alarm implies decreases in the voltage of the backup battery for the absolute position data detection circuit of the control card. If you've left the machine off for a long time and the battery has expired while the power is off, it's alot less fun. O manual também inclui uma visão geral da máquina, disposição dos componentes e eixos de coordenadas. The clamp alarm went away. Do this with the power on. I'm getting this servo alarm and can't figure out how to clear it out. I think that will tell you whether the prox switch inside the turret is functioning right or not. If you ever take this shower, you will never forget that day! Mar 29, 2023 · Hello all. Machine goes into E stop and can not clear it (control power/main disconnect off then on) like what we had last week. Get up there with a socket on an extention and manually turn it to the parked position. 34 Servo malfunction 3 (&0000006F, &0008, ) Feb 25, 2018 · Had a VTC 20G in the mid 90's . Thanks in advance. Manual jog using the buttons does not work, it must be done with with jog wheel on the pendant, but the main controller. Jan 4, 2024 · We have an issue with our Mazak Power master fusion 640t Recently, when we start the Mazak CNC machine, the following alarm appears: 22 FEEDBACK SYSTEM MALFUNCTION (1, 0, 0025) Then we replaced the 3. Now the management team has told me ( lead toolroom ) to come up with a written and practical test to give potential new hires . Any idea, why the MC output is not active? mazak t1 maintenance manual. It warns to thoroughly understand the manual and safety plates before operation to prevent injuries or damage. same machine. 125"cut off + . Hey I'm having issues with a Mazak Quick Turn 25 L. Nov 18, 2023 · I’ve been running into this alarm, 235 Tool Index Malfunction, on my QT8 T2 control. 376 MAIN POWER TURNING OFF MALFUNCTION; CNC machinists can Hello. Does anyone know about this, or away to clear the alarm? I looked in the book, and it says to clean the filter, but I don't really know where it's at 😅. this alarm, plus E Stop #2 alarm just popped up when I attempted to home axis, and even with many power down reboots won't go away. If we resolve the issue, I'll be sure to add the fix here in case anyone else runs into this. When the indicator LED stops flashing continue to step no. There's a thermal fuse on some relays. I searched on YouTube and a lot of it is their new touchscreen smooth stuff or someone I can’t understand. Oct 11, 2012 · We have a mazak Slant Turn 60N and we have been experiencing the same alarm on our machine, alarm "main supply power malfunction". It should be fairly easy to use an M function that is decoded to drive a relay, say for an indexer. use caution here though. Chips would get in the saddle and cut the wires . Apr 4, 2014 · Well as stated above, Im having trouble with our Mazak. Would like to clear the alarm so I can move machine up and away from spindle. Mar 12, 2013 · Well we have a new one today, #15 system Malfunction. Issued by Manual Publication Section, Yamazaki Mazak Corporation, Japan 12. This link will go to a . And wire it up to put power on the shunt trip coil of the main disconnect. 020" to clean up face of next part. To keep your facility running smoothly, Mazak's substantial, continuous investment in spare parts fulfillment ensures our fastest-possible reaction to the unexpected. I have no idea what a malfunctioning sensor will do though. Good idea to make sure your chuck barriers are set correctly in case you miscalculate the number of parts. The controller is a mds-b-sp-110. this is the alarm on mazatrol controller 21 Drive unit power malfunction 1,0,&0023 alarm the new spindle amp is flashing F6 and 23 we had this alarm before and was told to replace these two things. Sent from my D5803 using Tapatalk 1. The other codes would likely be G43. with feed hold flashing. I looked in the electrical cabinet and when it's started Dec 19, 2009 · This will usually throw an illegal toolchange position alarm, which is different alarm than LS tool malfunction alarm. Oct 10, 2017 · The voltage at the motor is proportional to the frequency. For an example, . Not Depth of cut, width of cut, feeds and speeds you would use for this setup with a 1/2 carbide endmill. 365" + . 2 volt battery (Part. but Really want to learn more about mazak nexus mill controls, conversational programming etc. 900 excessive position deviation: Power off and restart, initialize the driver and reset the parameters, and check if mechanical transmission is jammed or if the backlash is too large. We have 6 Mazak Troubleshooting Guide manuals for free PDF download. 4 and 54. It has been throwing a alarm 21, power unit drive malfunction. 4 or G43. This started making shorts in the system causing all kinds of alarms . : X/B Drive :Flashes between d1 & d4 . On Mazak it is G43 regardless of using DWO. The alarm is always on the first process "facing" when the tool It works a bit different on Fanuc and therefore Mazak cases. 3. Shaft is 3" 1018. I had one start tripping out on me, was able to trace it down to a wire grounding out on the metal control housing. Jul 20, 2015 · Disconect the pump leads and hook them up to 110 v direct to an extension cord (better check voltage I guess. Here's the deal. I found a post on here about the power supply dying on the spindle drive. still, something odd going on, might squirrelly set up key switch. Should be a zero at idle. this fixed the problems . I never went to an actual trade school, but I've worked in metal shops for over 6 years, and I'm currently employed at a different machine shop running two Haas CNC Lathes. I’m trying to power up / home an Integrex 100 that’s been sitting a few months. stop in, just encase it takes off. Would appreciate any help. Jul 16, 2020 · They will be in the back cabinet MRJ2 drive. Any help would be great Mazak Alarm 376 MAIN POWER TURNING OFF MALFUNCTION. 840 encoder data alarm: Encoder malfunction, restart the power supply, check if the encoder wiring is good, and if the shielded cable is properly grounded. I attempted to blame myself. We will be using Mazatrol if we get one. It asked me to home the machine, change parameter M18 but 7 to 0, power off and power on, then change parameter M18 back to what it was, then home machine again. ” I did review the owner’s manual but I’m not finding anything specific. 510" so next part has . In the controller of the spinlde reads f46c. No CNC all manual Alarm List for the Mazak INTEGREX 300/400-II For other Mazak alarm lists visit following pages. Couple lines for a ball mill if you need a pilot and 4 lines for a drill threw using a standard twist drill. Apr 4, 2014 · I worked on a mill with a M2 control a while back that had a relay in the position to do an auto power off. The error resets machine will work couple more minutes and then comes back. Malf. Long stringy and moist tobacco does not work very well. Jan/16/2024 Maintenance Recommendations for Fiber Lasers Nov 6, 2009 · Has any one had this problem, Went to fire up the Nexus 410A-II when these two alarms pop up #212 Magazine Drum Malfunction & #302 ATC Arm Driver Malfunction X & Y will home out Z will not Machine is not abused and has very little run time, last program run, drilling and tapping 4 holes Hello, I have Mazak HQR 250MSY that's throwing a "line filter malfunction" alarm. If you get voltage at the motor but it's not spinning, you found a problem! May 27, 2008 · Bob- A Mit tech told me to adjust SP19 which I did and it keeps the spindle around 100% power during speed changes. The document provides safety precautions for operating a MAZATROL FUSION 640T/MT/TE CNC machine. Este manual fornece instruções sobre a operação segura e correta da máquina Quick Turn Star 200. Had all kinds of problems with the wiring harness . 4. After getting it hooked up and moving around and replacing the battery on the magazine drive I tried a few tool changes. Oct 6, 2023 · But I found something online that was supposed to get rid of the alarm. Is resetting the absolute position user settable or do we need to call a mazak tech to do it? Also, the control spontaneously reboots and I have zero idea what's causing it. and manual name. MAZATROL M32 controller pdf manual download. 2 are dynamic so you can move the table but it doesn't have the same linearization and tool tip logic as 43. I absolutely LOVE the fact the machine will not index when close to the chuck in manual mode. e. Idea's ? (on edit) Nevermind MF1, MF2, reset tricked worked. I have been calling Mazak in Kentucky But have not gotten thru yet (2 days). If you command a slow speed, you should see a lower voltage. alarm 340 (controller error) my compadre looked up the alarm and it said to shut Down and restart. I'm a shop rat. They are replacing one of each this year and are thinking of going with Mazak for both as no one can remember why we went with 2 different brands in the first place. Shift amount will be part width + cut off width + stock to face off next part. 2> Press the "LASER POWER" OFF key ( 0 ). There are 5 possible reason for this alarm, but the machine is not giving me the reason, Just a number 21 alarm. have the E. We've had a really bad hiring experience in the shop . Once it starts cutting it warms up pretty fast and cuts off. Perhaps related to the Abs pos malfunction? Any suggestions are greatly appreciated! Aug 24, 2018 · We have a mazak 5 axis with mazatrol matrix 2. you can make a manual program and use a 0 instead of a 1 on the first line. Feb 21, 2022 · I put a piece of stock in the chuck and ran the same program as I had seen run in the previous shop. If you're lucky enough to have the alarm occur when the machine is under power, it will be a good day. This document contains an alarm list for a Mazatrol Fusion 640T/MT/TE machine tool. 6V battery, as per the alarm book instruction. 3> Turn the "LASER" key switch to the OFF position. Dec 5, 2004 · The electrical manual for this machine was not with the machine. That being said if Money doesn’t matter I’d say mazak…. Sander 509. pdf) or read book online for free. The thermal trip is now happening every 2-3 parts. Alarm 15, drive 1 =A6, drive 2 =f6/e7, drive 3=e6. Beside the TPM that we did, even though not 100%, we would need to study on why the servo is always malfunction. Nov 22, 2021 · I have a Mazak QT 200 and I am getting a battery malfunction alarm after I have replaced batteries and checked parameters are in but I am still getting #8 battery malfunction alarm have checked batteries with a tester I am using Mazak Quickturn 20 machine, machine is giving alarm - Alarm 21 Driver Unit Power Mulfunction Machine is normally working when started by spindle manually and on 300 rpm or higher, but when working when I stop the machine on 300 rpm or 800 rpm and then I start the machine again and it gives alarm 21. Within our spare parts department, Mazak globally retains nearly 195,000 part numbers in stock with more than $450 million in replacement parts and unit inventories for fast delivery. 1 when you rotate the turret and back to zero as soon as its clamped. Can anyone point me in the right direction? My Sep 8, 2008 · Hello everyone, i have a mazak plus machine with alarm on the screen 44 spindle malfunction 3. then about the tool going back to safe index. I'm sure we could get it done with a 20 year old Fadal and manual finishing like our previous machinist did, but I wouldn't be confident knowing when its the machine or myself at fault. VTC-200B industrial equipment pdf manual download. If a new manual is required, please order from the nearest Technical Center or Technology Center with the manual No. But I never had that problem myself so not sure. It is not providing the MC output to energize the 3 phase contactor to give input AC power to the power supply unit. Mazak provides products and solutions that can support a wide range of parts machining processes, such as high-speed and high-accuracy machines, various automation systems, and production support software and CNC equipment that support skill leveling and setup. At the moment of closing the door, the machine doesn't spin. (SEE D199) Mazak Alarm 395 CHECK SENSOR MALF. Any assistance is appreciated. Turn off power to the machine, if you don’t like high pressure hydraulic fluid showers. he did that (against my objections by the way) so now I have no home positions and can get anything in the Using a power coffee grinder or a food processor to change the cut of tobacco. we have a 1999 QT-250 Mazak and we are getting this alarm. The turret will rotate,and stop on the correct tool, but is not completely locking in. Also for: Vtc-200c, Vtc-300c. On my mills, it's about a 20-30 second delay before the alarm appears. Please see attachment for the alarm.

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