Advanced users, or those in large companies, may have their own set of design rules in place. Spring Calculator Professional can be customised to add your own "design standard" to work to.


NOTE: At present, this is only available for "standard" compression springs.


To start, go to Tools > Custom Design Standards.



There are three sections here:


Standard design limits are common to all standards, and define the basic scope in terms of overall size and shape of the spring, together with how stresses are calculated and where the working lengths should be. By changing the selected standard via the drop-down at the top, you can see how these values are set for the existing published standards.


Design stress limits define the maximum permissible working stress in the spring. These are blank for existing standards, because each material has its own limit. When you add your own standard, you can enter limits for these pre-defined broad groups of materials, and then add in any specific examples that you want to be different. Note that you do not have to put values in for every type of material, but if you then select a material of that type without a stress limit, it will always show up as overstressed.


Custom warnings define any limits you want to set on calculated outputs (or indeed inputs) of the spring. These will be highlighted against a variable you select.


Read more on creating your own custom warnings