CDworksCDworks

Engineering tools

Practical checks.
Clear assumptions.

Beta Seven free browser tools · Review assumptions before use.

Find the calculator or planning tool for the job. Start with a worked example, review the math, and keep an editable copy.

Find a tool

Available now

Choose the task.
Check the details.

All seven tools are free Beta releases. Calculations run in your browser; inputs are not uploaded. Compare the inputs and results below, then open a tool to review its formulas and limits.

7 tools available.

01 / PART LIMITS

Dowel pin hole sizing Beta

v1.1

Size press and slip holes from pin tolerance and your target fit windows, with exact inward rounding. Includes the original limit checker.

Inputs
Pin limits and desired press/slip fit windows.
Results
Guaranteed hole bands and achieved fit limits.

Millimetres or inches; switching units converts values.

Size press and slip holes
02 / ASSEMBLY

Tolerance stack Beta

v1.0

Check a signed one-dimensional size chain with worst-case limits and an optional, qualified RSS estimate.

Inputs
Minimum/maximum dimensions and each term's direction.
Results
Assembly limits and an optional midpoint-centred RSS interval.

Millimetres or inches; RSS assumptions are stated in the tool.

Open tolerance stack
03 / PRODUCTION

OEE & losses Beta

v1.0

Separate runtime, speed loss and first-pass quality for one production period. Review zero states and data-quality warnings.

Inputs
Period, stops, ideal cycle time, total count and first-pass non-good count.
Results
Availability, performance, quality, OEE and time losses.

Period and stops in minutes; ideal cycle time in seconds.

Open OEE calculator
04 / MEASUREMENT

Calibration limits Beta

v1.1

Generate reading limits from an explicit manufacturer full-scale magnitude or instrument span.

Inputs
Instrument range, accuracy basis and reference/actual readings.
Results
Tolerance windows and direct comparisons at each test point.

The unit is a label; editing it does not convert numbers.

Open calibration calculator
05 / SEQUENCE

Machine-cycle planner Beta

v1.0

Plan parallel actions and shared resources. Compare scenarios with timing diagrams and a captured baseline.

Inputs
Action durations, dependencies and capacity-one resources.
Results
A feasible schedule, resource occupancy and scenario comparison.

An ideal schedule; controller execution is not simulated.

Open cycle planner
06 / KINEMATICS

Motion-profile calculator Beta

v0.1

Model ideal rest-to-rest motion and link its duration to a cycle-planner action.

Inputs
Travel, speed and acceleration/deceleration limits.
Results
Triangular/trapezoidal profiles, move time and a linked action duration.

Linear or angular units; move time is always in seconds.

Open motion-profile calculator
07 / ASSEMBLY MOTION

Motion Lab Beta

v0.4.1

Group components and choreograph timed translations and rotations. Try the generic four-block example.

Inputs
Converted scene JSON or a saved Motion Lab project.
Results
An assembly sequence, editable project JSON or a PNG image.

Converted JSON only; native CAD import is unavailable.

Open Motion Lab

More in development

A growing workbench.

Operator-machine balance, O-ring and pneumatic worksheets remain in development. OEE here is a single-period calculator; ongoing tracking is not available. New tools will appear only when implemented and checked.

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