Trying this post again!
There was a problem with the previous version of the workbook’s calculation of AC Router performance. Unlike HF and brushless DC motor spindles, the speed controllers for the universal motors in AC routers will cause motor current/torque to increase significantly if necessary to achieve/maintain the specified speed. The stall current/torque universal motors can be as high as 10 times their rated values.
Since only some European manufacturers publish rated output power, the workbook assumes that 60% of other routers’ rated input VAs’ (Volts times Amps) is their rated (safe/continuous) output power. It also assumes that likely overly optimistic and adjustable 60% is constant over the useful operating range.
In an effort to clean things up a bit and hopefully make it easier to use and understand, I made a separate “AC Router SFPF Workbook” with worksheets for all the AC routers that folks seem to be using with Shapeokos. I also put the wood hardness spreadsheet back in (the rightmost spreadsheet). As always, feedback and questions are welcome and encouraged. 
AC Router SFPF Workbook.zip (214.8 KB)
