# I need to verify the surface profile of a part - Sine plates

C

#### Coleman Donnelly

I need to verify the surface profile of a part using a surface plate and height gage. My feature is not perpendicular or parallel to my datum - therefore I will need to use a sin plate to orient the feature parallel to my surface plate.

How do I calculate the gage block stack up for my sine plate, and how do i Zero my height gage if my datum plane is no longer parallel to my surface plate?

Thanks

#### Michael_M

Trusted Information Resource
Re: Sine plates...

If I understand the question correctly. The stack height is: Sine plate distance * sin of angle desired.

For example if using a 5" sine plate and want a 15 degree angle, the stack will be 1.2941 (1.294095 rounded).

#### Michael_M

Trusted Information Resource
Re: Sine plates...

I found a 'How to use a sine bar/plate' and uploaded the image.

Ignoring the whacked out instructions they show for the basic sine bar/plate, basically the formula is:

G=C * sinA

#### Attachments

• 90.3 KB Views: 138

#### Stijloor

Staff member
Super Moderator
I need to verify the surface profile of a part using a surface plate and height gage. My feature is not perpendicular or parallel to my datum - therefore I will need to use a sin plate to orient the feature parallel to my surface plate.

How do I calculate the gage block stack up for my sine plate, and how do i Zero my height gage if my datum plane is no longer parallel to my surface plate?

Thanks
OK, now you have the initial setup out of the way, can you describe the "Profile of a Surface" callout? I may be able to help you with its interpretation, better still, can you attach a sketch?

Stijloor.

C

#### Coleman Donnelly

HTML:
``````Think of the shape of an 'A' with the top triangle section removed:

Basic
<--->
____
/      \
/        \
/          \
DatumA          Profile0.010|A

The left leg is datum A.  The right Side is my profile call out.  I have a basic distance to the nominal surface location.

If the legs were parallel I would zero out my height gage on the datum surface.  Raise the height gage the baisic distance.  Re-Zero the height gage, and measure deviation from zero on the surface.``````
The problem is how do I zero out my height gage if my datum surface is not parallel to the base of my height stand. depending on where I zero I get a different result.

Need Help to Verify an Infrared Cure Oven General Measurement Device and Calibration Topics 9
Do we need an SOP for ISO 9001? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 9
Do CTQs need to be equipment specific? FMEA and Control Plans 8
Contract Manufacturer Do they need a complaint procedure? Medical Device and FDA Regulations and Standards News 8
Screen printing ink and machine selection_ Need help Manufacturing and Related Processes 6
Do employee training records need to be centralized? IATF 16949 - Automotive Quality Systems Standard 10
Need of EU Representative Designation for Turkey? EU Medical Device Regulations 3
If we use agile - do we still need to document TF as a waterfall just for the notified bodies need? IEC 62304 - Medical Device Software Life Cycle Processes 2
AS9102 First Article Inspection - do I need a second reviewer and signer? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
Furnace repaired - Do I need a new initial TUS? AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 1
Does FDA Registration QSR need to cover non-medical devices for contract repackager? US Food and Drug Administration (FDA) 1
Need ISO 15189:2012 Documentation toolkit. Document Control Systems, Procedures, Forms and Templates 0
Need a contract monitoring Tool General Information Resources 0
UDI-PI requirements on reusable surgical device, do we need serialisation? ISO 13485:2016 - Medical Device Quality Management Systems 3
Need Help with FPY Data in Assembly Process Manufacturing and Related Processes 7
17025 and NIST handbook relationship (need advice) ISO 17025 related Discussions 8
Does all of the suppliers need to integrated into the supplier list qualified of the company? Oil and Gas Industry Standards and Regulations 2
Need procedure for D&D inputs? ISO 13485:2016 - Medical Device Quality Management Systems 4
Need help on "Country of Origin" Medical Device and FDA Regulations and Standards News 0
Immediate need for 80601-2-56 Consulting expert. PM me for details Career and Occupation Discussions 0
You're Gonna Need a Bigger Root Cause Coffee Break and Water Cooler Discussions 12
PSA Suppliers - CSR matrix and need the quality manual of PSA APQP and PPAP 6
Need Help With Information Security Asset Risk Register IEC 27001 - Information Security Management Systems (ISMS) 2
"World Class Product" based QM. I need advice. Quality Management System (QMS) Manuals 14
Do I need to sign off my annual audit calendar? Internal Auditing 2
Do we need to retrospectively use the "MD" symbol (indicating device is a medical device) on labels, e.g. finished devices within expiration date? EU Medical Device Regulations 2
Do I need separation in my circuit with a medical charger? IEC 60601 - Medical Electrical Equipment Safety Standards Series 0
Certified Auditor - Need of additional certification specific to industry ( GMPs) ASQ vs ECA vs others Professional Certifications and Degrees 1
Low risk IVD study in the UK, do I need MHRA approval? UK Medical Device Regulations 1
Medical Device Contract Manufacturer - Does the CM need to register with FDA? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 3
Records Control - Does each individual record need to be numbered? Records and Data - Quality, Legal and Other Evidence 2
Is there a need for clinical test of Class IIa products (for MDR)? EU Medical Device Regulations 2
Do Software Subcontractors need to be ISO13485 compliant in the EU? EU Medical Device Regulations 3
Do I need a "State of the art" plan? CE Marking (Conformité Européene) / CB Scheme 1
Need advice for schooling Quality Manager and Management Related Issues 5
What information do i need to get from the device manufacturer 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 0
Need guidance on project ISO 13485:2016 - Medical Device Quality Management Systems 2
Need MSA 4th ed. compliant attribute MSA template General Measurement Device and Calibration Topics 4
Need Change Control Yes/No Decision Tree Template ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
Does an accessory need an IFU if it use is discussed in the Parent device IFU? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 5
Countries with no need for FSC (Free sales certificate) Other Medical Device Regulations World-Wide 0
The term "Benefit Risk Ratio" in EU MDR, do I need to present benefit risk analysis as a RATIO Risk Management Principles and Generic Guidelines 4
Brexit When does the UK responsible person need to be in place? UK Medical Device Regulations 10
Do we need issue ECN (Engineering Change Notice) towards updated Material Specification? Design and Development of Products and Processes 2
IPC-A-630 - Is this free or do i really need to pay for it? Manufacturing and Related Processes 4
ISO/ IEC 17021 Resource requirement (need help) Document Control Systems, Procedures, Forms and Templates 5
Need a programmer for QVI's VMS software for optical inspection machine Inspection, Prints (Drawings), Testing, Sampling and Related Topics 0
How to decide what characteristics need to be verified during incoming inspection? ISO 13485:2016 - Medical Device Quality Management Systems 5
Change Approval Requirements - Does every change need formal customer approval? Design and Development of Products and Processes 17
Do I need a qualified compiler for class B software? IEC 62304 - Medical Device Software Life Cycle Processes 3