Linear Calibration
Verify positioning accuracy, repeatability, straightness, and squareness across full axis travel using laser interferometry with NIST-traceable accuracy to 1.0 parts per million.
Maximize production quality and eliminate costly errors with professional CNC machine accuracy audits. Sarkinen Calibrating delivers NIST-traceable measurements to 1.0 parts per million, verifying positioning accuracy, repeatability, and geometric alignment across all axes. Our comprehensive diagnostic approach identifies hidden issues before they impact part quality, helping manufacturers maintain tight tolerances and reduce unexpected downtime.
Comprehensive diagnostic testing using advanced measurement systems to verify machine performance and identify accuracy issues.
Verify positioning accuracy, repeatability, straightness, and squareness across full axis travel using laser interferometry with NIST-traceable accuracy to 1.0 parts per million.
Quick circularity evaluation using Renishaw QC20-W Ballbar to identify backlash, servo mismatch, reversal errors, and squareness problems affecting machine health.
Measure angular positioning accuracy, repeatability, and alignment of rotary tables and trunnions using Renishaw's Rotary Calibration System.
Detect pitch and roll errors in machine beds, guideways, and large structures using Mahr-Federal's Electronic Level for proper axis geometry.
Expert leveling and flatness measurement using Moody Plot to ensure surface plates provide accurate reference planes for inspection and layout work.
Hands-on instruction for laser interferometer, ballbar systems, and machine operation best practices tailored to your equipment and skill level.
Initial Consultation and Scope Definition
We review your machine specifications, production requirements, and accuracy concerns to determine the appropriate testing methods. Our team identifies which measurements—linear, rotary, or circularity—will provide the most valuable diagnostic information for your specific equipment and tolerance requirements.
Precision Measurement and Data Collection
Analysis and Diagnostic Reporting
Follow-Up Support and Verification
Helping precision manufacturers maintain accuracy and eliminate unexpected downtime.
"I have worked with Mr Sarkinen on a job in Portland He is a Highly Skilled, Knowledgable Professional. I would definitely recomend him for all your Machine Tool Calibration Metrics. Sincerely Curtis Page Naughtellis CNC Service"
"As plant manager at Triad, I am always looking for ways of testing and measuring the condition of our large machines. Our outside repair tech suggested that I have Sarkinen Calibrating run their Ball Bar Test on all of our machines to show if we had any critical wear issues..."
"This guy knows his stuff. Would definately recommend! Friendly good people!"
"I have worked with Mr Sarkinen on a job in Portland He is a Highly Skilled, Knowledgable Professional. I would definitely recomend him for all your Machine Tool Calibration Metrics. Sincerely Curtis Page Naughtellis CNC Service"
"As plant manager at Triad, I am always looking for ways of testing and measuring the condition of our large machines. Our outside repair tech suggested that I have Sarkinen Calibrating run their Ball Bar Test on all of our machines to show if we had any critical wear issues..."
"This guy knows his stuff. Would definately recommend! Friendly good people!"
"I have worked with Mr Sarkinen on a job in Portland He is a Highly Skilled, Knowledgable Professional. I would definitely recomend him for all your Machine Tool Calibration Metrics. Sincerely Curtis Page Naughtellis CNC Service"
"As plant manager at Triad, I am always looking for ways of testing and measuring the condition of our large machines. Our outside repair tech suggested that I have Sarkinen Calibrating run their Ball Bar Test on all of our machines to show if we had any critical wear issues..."
"This guy knows his stuff. Would definately recommend! Friendly good people!"
Founded by a former machine operator who understands production operations from the inside.
NIST-traceable measurements to 1.0 parts per million—accuracy that exceeds the required 10:1 calibration ratio.
Serving Portland OR and SW Washington with faster response times than out-of-area providers, minimizing your downtime.
Founded by Larry, a former machine operator, we deliver solutions that increase production quality and efficiency.
Beyond equipment maintenance—we evaluate entire machining operations to identify issues before they become production problems.
Led by experienced professionals who understand machining operations.
Founder
Larry founded Sarkinen Calibrating with a unique perspective gained from years as a machine operator before building a calibration service. For Larry, precision measurement has always been more than just equipment maintenance—it's about understanding the complete machining operation and providing solutions that genuinely increase production quality and efficiency. His hands-on experience on the shop floor gives him insight into the real-world challenges manufacturers face daily. Larry knows that when a machine drifts out of tolerance, it doesn't just affect one part—it can cascade through an entire production run, creating waste, rework, and customer dissatisfaction. This operator-first approach shapes how Sarkinen Calibrating serves customers throughout Portland OR and SW Washington, delivering calibration services that minimize disruption while maximizing accuracy and reliability.
What is the tolerance of a CNC machine?
CNC machine tolerance varies by machine type, size, and application, but most precision machines are designed to hold tolerances of ±0.0001" to ±0.001" (0.0025mm to 0.025mm). However, actual achievable tolerance depends on machine condition, calibration, thermal stability, and wear. Regular accuracy audits verify that machines continue to meet their specified tolerances throughout their service life.
How often should CNC machines be calibrated?
What does a CNC accuracy audit include?
How long does a CNC accuracy audit take?
What if my machine fails the accuracy audit?
Can you verify new machines before warranty expires?
Do you provide service outside Portland and SW Washington?
What measurement accuracy can you achieve?
Our calibration experts are ready to discuss your specific equipment and accuracy requirements.
All measurements traceable to NIST standards
Highest customer satisfaction on Google
Certified in Renishaw measurement systems
Get NIST-traceable measurements and detailed diagnostic reporting. Fill out the form below and our team will contact you within one business day to discuss your equipment and schedule a convenient audit time.
For immediate assistance, feel free to give us a direct call at (360) 907-3058 You can also send us a quick email at
For immediate assistance, feel free to give us a direct call at (360) 907-3058 You can also send us a quick email at