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11/10/2026

🙏🌺 जय माता दी! Happy Navratri 🌺🙏

29/09/2026

How to clear 453 spc soft disconnect alarm
Please read carefully

The Fanuc 453 (SV0453) n-AXIS: SPC SOFT DISCONNECT ALARM means the CNC software has detected an intermittent or bad connection to the alpha (α) pulse coder (encoder) on the specified axis.
Common Causes
• Loose or Bad Cable: The feedback cable between the pulse coder and the servo amplifier is loose, broken, or suffering from pin-level intermittency.
• Contamination: Oil, coolant, or moisture has leaked into the encoder connector or housing.
• Failing Pulse Coder: The internal encoder hardware is failing or dropping data bits.
• Servo Amplifier Issue: The feedback processing circuit on the servo amplifier board is damaged or failing.
Troubleshooting Steps
1. Power Off and Reseat: Turn off the CNC system completely. Unplug and re-plug the pulse coder cable at both the motor encoder end and the servo amplifier end.
2. Inspect for Contamination: Check connectors for oil or coolant intrusion. Clean and dry them thoroughly if contaminated.
3. Check Continuity: Test the encoder cable line-by-line with a multimeter to verify pin-to-pin continuity and check for broken internal wires.
4. Swap Components: If the cable and connections test fine, swap the encoder or test the axis cable on a known good working axis to isolate whether the fault follows the cable/encoder or stays on the amplifier

23/09/2026

How to Solve Alarm In Fanuc control SV0410 (Y) EXCESS ERROR (STOP)

This means the FANUC control sees too much Y-axis position deviation while the Y axis is supposed to be stopped. The control is commanding the Y axis to hold position, but the actual position feedback is not staying within the permitted error.

Most likely causes

For your Doosan FANUC i-Series machine, I would check these in this order:

Y-axis mechanical binding
Check Y-axis ways and ballscrew.
Check lubrication.
With power OFF and properly secured, check whether the Y axis can be moved through its travel without an unusually tight spot.
Check ballscrew bearing and coupling.
Y-axis servo motor coupling
Check for a loose/broken coupling between the servo motor and ballscrew.
Look for coupling slippage or backlash.
Y-axis encoder / feedback cable
Inspect the encoder cable from the Y motor to the servo amplifier/control.
Check both connectors for loose pins, oil/coolant contamination, damaged wires or poor shielding.
Since the alarm is specifically EXCESS ERROR (STOP), feedback problems are important to investigate.
Y-axis servo motor
Check whether the motor is vibrating/hunting when Servo ON.
Check motor power connections and motor condition.
Y-axis servo amplifier
Check the amplifier's LED/status display for another alarm.
If X/Z amplifier and Y amplifier are identical and the machine design permits it, a controlled amplifier swap can help determine whether the fault follows the amplifier. Do this only after recording parameters and with proper power isolation.
Very useful FANUC test

Go to:

SYSTEM → DGN / Diagnosis → Servo

Watch the Y-axis position error / position deviation value around the time SV0410 occurs. FANUC troubleshooting documentation uses the position-error diagnostic to investigate this type of alarm.

If the position error is already increasing while the Y axis is stopped, that strongly points you toward:

Encoder/feedback → motor/coupling → mechanical movement → servo amplifier

Important

Do not increase/change the excess-error parameter just to remove the alarm. Parameters such as the servo position-loop and excess-error limits are machine-specific; changing them without the original Doosan/FANUC values can hide the actual problem or create an unsafe servo condition.

Quick diagnosis
What happens Check first
Alarm immediately after Servo ON Encoder/feedback, motor, amplifier
Y axis moves a little then alarms Mechanical binding, coupling, motor
Motor vibrates/hunts while stopped Encoder/feedback or servo tuning
Alarm occurs only at one Y position Ballscrew/way mechanical problem
Alarm follows amplifier after swap Servo amplifier
Alarm remains on Y after amplifier swap Motor, encoder, cable or mechanics

From your photo, because the same SV0410 Y alarm is repeatedly recorded, I would start with the Y-axis encoder cable/connectors and the mechanical condition of the Y axis before replacing the servo amplifier.

If you send me the video you uploaded showing exactly what the Y axis does when Servo ON is pressed or when you jog Y, I can analyze the sequence and tell you which part to check first.

18/09/2026

How to Backup FANUC 0i-TD CNC Control Data

Regular CNC backups are very important to protect machine parameters, programs, offsets, and other control data.

📌 Basic FANUC 0i-TD Backup Procedure:

1️⃣ Insert a formatted CF Card / USB into the CNC control.
2️⃣ Press SYSTEM and go to the PMC / I/O / DATA screen depending on the machine configuration.
3️⃣ Set the I/O channel correctly for the storage device.
4️⃣ Backup the following important data:
✅ CNC Parameters
✅ Programs (O0001, O0002, etc.)
✅ Tool Offsets / Work Offsets
✅ Macro Variables, if required
✅ PMC Parameters / Keep Relays, if supported
✅ Pitch Error Compensation, if applicable
✅ SRAM / All Data backup, when required

⚠️ Important: Always take a complete backup before replacing batteries, control boards, drives, or major electrical components.

💡 Technician Tip:
Keep the backup file with the Machine Make, Model, CNC Control, Machine Serial Number, and Date. This makes recovery much easier later.

📁 Example:
Mori_Seiki_Fanuc_0iTD_SN12345_Backup_2026-09-18

A proper backup can save hours or even days of troubleshooting and machine downtime.

05/09/2026

सीएनसी मशीन रिपेयर और मशीन के बारे में सीखने के लिए और सिख के पैसे कमाने के लिए मेरे यूट्यूब चैनल को सब्सक्राइब कीजिए और फेसबुक पेज को लाइक कीजिए और फॉलो कीजिए
Online, Video Call, On Voice Call CNC Machine Repairing Free Call me For any System

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04/09/2026

भगवान श्री कृष्ण जी के जन्मोत्सव की बहुत बहुत बधाई हो, भगवान।आपको सदा खुशी दें।खुश रखें और आपकी फैमिली को भी खुशहाल रखें
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03/09/2026

FANUC Alarm 701 — How to Solve

FANUC Alarm 701

Alarm 701 का exact meaning FANUC control series और machine builder के अनुसार अलग हो सकता है। इसलिए पूरा alarm message और control model देखना जरूरी है।

इन चीज़ों को चेक करें:

Spindle amplifier/drive display पर कोई additional alarm code है या नहीं।
Spindle motor encoder/feedback cable और connectors चेक करें।
Spindle U/V/W power cables में loose connection या damage चेक करें।
Spindle cooling fan और amplifier temperature चेक करें।
CNC-to-spindle communication/optical cable चेक करें।
देखें कि कोई spindle-related PMC/M-code condition spindle को operate करने से रोक तो नहीं रही।
यदि समस्या spindle amplifier/motor बदलने के बाद शुरू हुई है, तो parameters और motor/amplifier compatibility verify करें।
Alarm reset करके machine को power cycle करें। अगर Alarm 701 फिर से आता है, तो spindle drive की further testing जरूरी है।

कृपया मुझे ये भेजें:

Alarm 701 की clear photo
FANUC control model, जैसे 0i-MC / 0i-TC / 16i / 18i / 21i
Spindle amplifier model, जैसे A06B-###x-###x
Spindle amplifier पर दिख रहा कोई भी additional alarm/code

इसके बाद मैं आपको exact solution और step-by-step checking बता दूँगा।

FANUC Alarm 701 = “OVERHEAT: FAN MOTOR.” It normally means the CNC control has detected that one of its cooling fans has stopped, is running too slowly, or has a fan-detection/power problem. It is generally a fan-monitoring alarm, not simply a high-temperature alarm.

Check in this order:

Power OFF the machine safely.
Locate the cooling fan(s) on the FANUC CNC control unit, commonly at the upper portion of the control.
Check whether the fan is:
Stopped
Running slowly
Making abnormal noise
Blocked by dust/chips
Clean the fan and air filter and check that the fan rotates freely.
Check the fan connector and wiring for loose or damaged connections.
If the fan has the correct supply voltage but does not run properly, replace the fan with the correct FANUC-compatible fan.
Power the machine back ON and check whether 701 clears.
If the fan runs normally but Alarm 701 remains, check the fan feedback/detection circuit and fan power supply.

⚠️ Important: Do not permanently disable/bypass the fan alarm just to keep the machine running. The fan protects the CNC control from overheating and hardware damage.

For an exact diagnosis, send me:

FANUC control model (e.g. 0i-MC, 0i-TC, 16i, 18i, 21i, 31i)
A clear photo of the 701 alarm
Photo of the FANUC control unit/fan area
FANUC control unit model number A02B-###x-###x

I can then tell you which fan to check and where its connector is located.

02/09/2026

How to Solve Fanuc spindle Alarm no. 31

FANUC Spindle Alarm 31 — Troubleshooting

Alarm 31 on a FANUC spindle amplifier is commonly related to a spindle motor/encoder feedback or spindle control condition, but the exact meaning depends on the spindle amplifier series.

Check in this order:

Power OFF the machine safely and wait for the DC bus to discharge.
Check the spindle motor encoder/sensor cable and connectors for loose or damaged connections.
Check the spindle motor U/V/W power cables for loose connections or short/ground fault.
Check the spindle amplifier LEDs for any additional alarm code.
Check the CNC-to-spindle communication/optical cable and connectors.
Verify the spindle parameters and compare them with the machine backup.
If the alarm started after replacing the spindle amplifier or motor, verify amplifier/motor compatibility and parameters.
Reset and power-cycle the machine. If Alarm 31 returns immediately, further testing of the spindle amplifier and motor feedback system is required.

For the exact solution, send me a photo of the spindle amplifier showing Alarm 31 + its model number (A06B-###x-###x). I can then tell you exactly what Alarm 31 means for that drive and which terminals/voltages to check.

FANUC Spindle Alarm 31 आमतौर पर spindle motor, encoder/feedback signal या spindle control से संबंधित हो सकता है। इसका exact meaning spindle amplifier के model पर निर्भर करता है।

Troubleshooting Steps
Machine को सुरक्षित तरीके से OFF करें और DC bus voltage discharge होने तक प्रतीक्षा करें।
Spindle motor encoder/feedback cable और connectors को चेक करें। Loose, damaged या broken connection की जांच करें।
Spindle motor U/V/W power cables चेक करें। Loose connection, short circuit या ground fault की जांच करें।
Spindle amplifier की LED/display चेक करें और देखें कि कोई additional alarm code तो नहीं है।
CNC-to-spindle communication/optical cable और connectors चेक करें।
Spindle parameters को चेक करें और machine backup से compare करें।
यदि alarm spindle amplifier या motor बदलने के बाद आया है, तो motor/amplifier compatibility और parameters verify करें।
Alarm reset करके machine को power cycle करें। यदि Alarm 31 तुरंत वापस आता है, तो spindle amplifier और motor feedback system की further testing आवश्यक है।

Exact diagnosis के लिए:
कृपया Alarm 31 दिखाते हुए spindle amplifier की clear photo और उसका model number (A06B-###x-###x) भेजें। इससे उस particular amplifier के लिए exact alarm meaning और required checks बताए जा सकते हैं।

01/09/2026

How To Solve FANUC Spindle Amplifier Alarm 59

Alarm 59 आमतौर पर PSM Cooling Fan या PSM (Power Supply Module) और SPM (Spindle Module) के बीच communication से संबंधित समस्या को दर्शाता है।

मुख्य कारण
PSM का cooling fan खराब या blocked होना।
JX1B (PSM) से JX1A (SPM) तक communication cable loose या खराब होना।
PSM/SPM के terminals या bus bars में loose connection।
Control PCB या Spindle Module खराब होना।
Troubleshooting Steps

1. PSM Display चेक करें

PSM Alarm 2: PSM cooling fan चेक करें। Fan में chips/dust या कोई blockage हो तो साफ करें और देखें कि fan घूम रहा है या नहीं। जरूरत होने पर fan बदलें।
PSM Alarm 8: PSM heatsink और cooling system चेक करें।
PSM पर कोई alarm नहीं है: Step 2 पर जाएं।

2. Communication Cable चेक करें

PSM JX1B → SPM JX1A cable को चेक करें।
Connectors, pins, wires और shielding चेक करें।
दोनों connectors properly fitted हैं या नहीं, सुनिश्चित करें।
Cable खराब होने पर उसे replace करें।

3. Power Connections चेक करें

PSM/SPM के screw terminals और bus-bar connections को चेक और tighten करें।
Loose, burnt या damaged connection की जांच करें।

4. समस्या फिर भी रहती है
अगर cooling fan, communication cable और connections ठीक हैं, तो समस्या PSM/SPM control PCB या Spindle Module में हो सकती है। आगे testing या component replacement की आवश्यकता हो सकती है।

⚠️ Safety: Electrical cabinet खोलने या connections चेक करने से पहले main power OFF करें और machine की electrical safety/lockout procedure का पालन करें।

Alarm 59 generally indicates a problem related to the PSM cooling fan or communication between the PSM (Power Supply Module) and SPM (Spindle Module).

Primary Causes
PSM cooling fan failure or blockage.
Faulty/loose communication cable between JX1B (PSM) and JX1A (SPM).
Loose connections at the PSM/SPM terminals or bus bars.
Faulty control PCB or Spindle Module.
Troubleshooting Steps

1. Check the PSM display

PSM Alarm 2: Check the PSM cooling fan. Clean any chips/dust and check whether the fan is rotating. Replace the fan if required.
PSM Alarm 8: Check the PSM heatsink and cooling system.
No PSM alarm: Continue to Step 2.

2. Check the communication cable

Inspect the cable from PSM JX1B → SPM JX1A.
Check the connectors, pins, wires, and shielding.
Make sure both connectors are properly seated.
Replace the cable if damaged.

3. Check power connections

Check and tighten the PSM/SPM screw terminals and bus-bar connections.
Look for loose, burnt, or damaged connections.

4. If the problem remains
If the cooling fan, cable, and connections are OK, the problem may be with the PSM/SPM control PCB or the Spindle Module itself. Further testing or component replacement may be required.

⚠️ Safety: Switch OFF the main power and follow the machine's electrical safety/lockout procedure before opening the electrical cabinet or checking connections.

31/08/2026

How to solve Fanuc OiMC CNC Control 449 ipm alarm z axis

FANUC 0i-MC showing Alarm 449: Z AXIS INV. IPM ALARM, the servo amplifier's IPM (Intelligent Power Module) has detected an abnormal condition. On many FANUC SVMs, the Z-axis corresponds to the N-axis, and the amplifier may show “A.” for that channel.

English — Short Troubleshooting
Power OFF the machine and follow proper lockout/safety procedure.
Check the servo amplifier LED. For a 3-axis SVM, A/A. generally indicates the third/N-axis (Z-axis) fault.
Check the Z-axis motor power cable for short circuit, damaged insulation, loose terminals, or coolant contamination.
Check the Z-axis motor insulation to ground and phase-to-phase condition with the proper test equipment.
Inspect the Z-axis for mechanical binding—ball screw, guideways, bearings, brake, and excessive load.
If the motor power cable is disconnected and 449 remains, the servo amplifier/IPM is highly suspect.
If the alarm disappears when the motor cable is disconnected, troubleshoot the Z-axis motor and motor power cable before replacing the amplifier.

Important: Do not megger the motor while it is connected to the FANUC amplifier. Disconnect the motor/cable appropriately before insulation testing.

हिंदी — शॉर्ट ट्रबलशूटिंग
Machine की Power OFF करें और proper safety/LOTO procedure follow करें।
Servo amplifier की LED display चेक करें। 3-axis SVM में A/A. आमतौर पर तीसरे/N-axis यानी Z-axis fault को indicate करता है।
Z-axis motor power cable में short circuit, damaged insulation, loose terminal या coolant contamination चेक करें।
Proper test equipment से Z-axis motor की insulation-to-ground और phase-to-phase condition चेक करें।
Z-axis में mechanical binding चेक करें—ball screw, guideways, bearings, brake और excessive load।
Motor power cable disconnect करने के बाद भी 449 रहता है, तो servo amplifier/IPM faulty होने की संभावना बहुत अधिक है।
Cable disconnect करने पर alarm हट जाता है, तो पहले Z-axis motor और motor power cable को troubleshoot करें।

सबसे आसान isolation test:
Z-axis motor power cable को amplifier से disconnect → power ON → 449 फिर भी आता है या नहीं देखें। यदि फिर भी 449 आता है, drive/IPM की तरफ ज्यादा suspicion है; यदि alarm हटता है, motor/cable side जांचें.

अगर आप servo amplifier का model number (A06B-###x-###x) और amplifier की LED की photo भेज दें, मैं आपको Z-axis के लिए exact test points और next steps बता सकता हूँ।

Address

TN CNC HUB, Vinod Kanda & Used CNC Machines Trader , Used CNC Machines Sale Purchase Trader, Plot No. 30 Sirhind Road Opposite Sunrise Hotel Patiala
Patiala
147001

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm
Saturday	9am - 5pm
Sunday	9am - 5pm

Telephone

+919871628531

Website

http://www.tncnchub.com/

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