SBS - The best value in QMS software

Calibration of CNC Machines - Does anyone have written documentation procedures?

#1
Does anyone have written documentation procedures on how to calibrate CNC machines to ensure that produce consistent product?
 
Elsmar Forum Sponsor
C

CJacobsen

#2
In my experience (working with a Machine Tool Manufacturer a few years ago - lots of CNC machines in this facility) when calibration of these machines came up, the manufacturer of the machine had supplied the alignment and calibration procedures and in fact for most of the machines, these procedures could be found in the Technical Manuals. I would check these two places first. These are procedures that are performed usually during the initial installation and set-up of the machines.

Even though most machines came with a 'Test' program, this facility developed their own 'test' program for each machine that related to the parts they were actually producing. This program was used in conjunction with written instructions for setting up the machine to perform the test. This procedure (written instructions and test program)was run after the initial set-up, calibration and alignment of the electronic and mechanical systems was performed. Depending on the machine, the program instructed the machine to produce a part or machine raw material to a specific size, pattern, shape or whatever, and then this was checked using standard micrometers, calipers, gages, etc. and the data recorded.

One aspect determined to be a big factor in the machine passing the 'test' program test, was the tooling currently in the machine. After many runs, it was determined that the actual cutting edge of the tool being used contributed the most error or variance in the piece being produced as opposed to the finite movement and placement control of the cutting tool.

Subsequent checks of machines were done using this test program and written procedure only. Cycles were every 3 or 6 months. This cycle was determined mostly by the production rate of the machine. If the part was produced to size/spec., the machine was considered 'in cal.' If the part was not produced properly, the full calibration/alignment procedure was performed.

Hope this helps.
 
C

CJacobsen

#3
I should add that some machines were tested more frequently than the 3 or 6 months stated above. This facility had 110 or so machines. Generally the smaller machines were tested more frequently - two weeks to 1 month cycles. This was due to the heavy production load and nature of the machines.

Tool life was also monitored and tooling was changed based on number of cuts or time in service as opposed to when it got dull (of course it could be changed any time sooner if warranted.) This was to prevent the tooling from getting worn to the point that the variance introduced was unacceptable.
 
Thread starter Similar threads Forum Replies Date
J CNC Machine Tool Calibration - 6 dof Calibration Interferometers General Measurement Device and Calibration Topics 1
L Caliper Calibration Standards - One for CNC and one for Sheet Metal? General Measurement Device and Calibration Topics 9
J CNC Calibration - What should be calibrated on a HAAS machine? General Measurement Device and Calibration Topics 7
M Machine Tool Calibration - Machine Capability Studies on CNC Machine Tools Manufacturing and Related Processes 5
N IATF Calibration Lean in Manufacturing and Service Industries 2
Q Do these certificates of calibration meet ISO 9001 requirements for traceability to NIST? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 7
T Plug Gage Calibration Calibration and Metrology Software and Hardware 1
M Load Cell Calibration using a totalizer on a flow meter General Measurement Device and Calibration Topics 0
E Calibration Records needed ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
D Limited Range Calibration - 5000 lb Industrial floor scale General Measurement Device and Calibration Topics 3
D Calibration of Small Scales General Measurement Device and Calibration Topics 26
C How to Establish the Calibration & Measurement Capability (CMC)? ISO 17025 related Discussions 1
I IQOQ or just initial calibration required? General Measurement Device and Calibration Topics 3
B Calibration in real life ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
J Calibration cycle for monitoring & measuring tools used in medical device manufacturing General Measurement Device and Calibration Topics 5
A Is calibration of test weight required General Measurement Device and Calibration Topics 4
S Calibration Frequency for Slip Gauge Kit used for CMM Calibration? General Measurement Device and Calibration Topics 0
S Calibration/Verification of customer fixtures IATF 16949 - Automotive Quality Systems Standard 6
Ron Rompen Calibration by manufacturer ISO 17025 related Discussions 4
Q Calibration verification records 7.1.5.2.1 IATF 16949 - Automotive Quality Systems Standard 2
B AS9100D 7.1.5.2 Calibration or Verification Method using outside cal lab AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 1
W Next Calibration Due Date Calibration Frequency (Interval) 5
S Where do l get calibration standards to run a calibration lab? Other ISO and International Standards and European Regulations 2
A OEM On-Site Calibration issues during Covid19 ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 12
D Calibration tolerance question using Pipettes Medical Device and FDA Regulations and Standards News 1
M Calibration Certificate Result issued by an accredited external laboratory General Measurement Device and Calibration Topics 9
G Calibration of "Master Parts" Used as Gauges Calibration Frequency (Interval) 5
R Calibration lab environmental monitoring General Measurement Device and Calibration Topics 4
G Calibration of Rotronic probe but not digital readout? General Measurement Device and Calibration Topics 3
F Standard Calibration Procedures: Recommended Practice ISO 17025 related Discussions 0
T Temperature Requirements For In House Calibration - AS9100 AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 16
B Gage calibration frequency, ISO and IATF - What are the requirements Calibration Frequency (Interval) 3
Crimpshrine13 Laboratory Scope - Calibration vs. Test Methods - IATF 16949 IATF 16949 - Automotive Quality Systems Standard 3
Crimpshrine13 Calibration of pH Meter Probe Calibration and Metrology Software and Hardware 3
F ESD workbench "calibration" Manufacturing and Related Processes 2
C Correct Calibration Method for Dial Depth Gage General Measurement Device and Calibration Topics 6
F Nist traceable calibration certificates General Measurement Device and Calibration Topics 1
G Tool tracebility and First calibration requirements for aerospace (AS9100) organisation AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 5
D Calibration of Digital thermometer with surface probe General Measurement Device and Calibration Topics 1
T Calibration or Verification -> Cm and Cmk, etc. Definitions, Acronyms, Abbreviations and Interpretations Listed Alphabetically 3
G Is repeatability required for equipment calibration? General Measurement Device and Calibration Topics 10
was named killer AS 9100D - Calibration Instructions - Controlled documents? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 6
B Photovoltaic Tester Calibration General Measurement Device and Calibration Topics 0
B Temperature loop: partial calibration General Measurement Device and Calibration Topics 10
G Glass scale calibration at 74 degrees F? General Measurement Device and Calibration Topics 4
A Digital Timer Calibration Requirements General Measurement Device and Calibration Topics 3
Ron Rompen Barcode Verifier Calibration and Use Calibration and Metrology Software and Hardware 5
S Is Optical Parallel Set required calibration? ISO 17025 related Discussions 1
A Calibration of Power Supplies AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
D Calibration Process Flow Map Example Wanted General Measurement Device and Calibration Topics 3

Similar threads

Top Bottom