How Tolcap Works

Tolcap combines real world engineering data collected over the last 30 years with the latest web technologies to predict process capability.

Below you'll find detailed information about how Tolcap works. If you have any questions, please get in touch. We're always happy to answer any queries.

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Step 1. Choose your manufacturing process and material

Tolcap includes data maps for over 80 processes. These maps have been collated on the shop floor, working with real production machinery, making real components. See a list of the manufacturing processes included with Tolcap.

Step 2. Choose the type of calculation

Tolcap allows 3 different types of calculation, based on the data you have and the result you need:

  • Enter the dimension and tolerance to calculate the capability of your tolerance and predicted parts per million (PPM) out of tolerance.
  • Enter the dimension and target Cpk to calculate the tolerance and predicted PPM out of tolerance.
  • Enter the dimension and target PPM to calculate the tolerance and predicted Cpk.

  • Tolcap in Tolerance mode

  • Tolcap in Cpk mode

  • Tolcap in PPM mode

Step 3. Fine tune your calculation

Tolcap includes 3 optional, easy to use Wizards that will fine tune your calculation to take account of any special materials, geometry or additional variations.

Step 4. Hit calculate and check your results

Tolcap provides your results in plain English, giving you a concise explanation of your process capability and detailed graphs show your calculation result in context.

Your results can be viewed from different perspectives via the three Results tabs:

  • Data - this result give you the raw data of your calculation and summarises the results in plan English.
  • Map - displays a process capability map that shows the relationship between the achievable tolerance and the characteristic dimension.
  • Range - displays a process range chart that shows the minimum and maximum capable tolerances according to your process, material and manufacturing conditions.

  • Tolcap results in Data mode

  • Tolcap results in Map mode

  • Tolcap results in Range mode

Step 5. Next steps

Once you've found your perfect tolerance, you can save the calculation that produced it, print out a physical copy or start a new calculation.

Interested in revolutionising your approach to tolerances?

If you want to investigate Tolcap further, sign up for a trial, take a look at our prices or get in touch with any questions.

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