How many RPMs does a high speed floor buffer do?

I apologize, but I need more information about the specific model of the Eclipse propane floor buffer to locate the manual and provide troubleshooting steps. Can you please provide the model number or any additional details about the buffer?

Other than design differences tension settings are much the same.
Check out these videos and you will probably find your answer.
sewing machine tension YouTube

www.sears.com/search=kenmore%20floor..

www.clarkeus.com

https://www.kenteuroclean.com/service/manualspartslists.aspx

www.mercuryfloormachines.com/burnishers.aspx

Try Amazon for floor polishers and buffers. Here is a link to some of the better rated products they have available:
http://www.amazon.com/s/ref=sr_nr_p_72_0?rh=n%3A1055398%2Cn%3A%211063498%2Cn%3A510106%2Cn%3A510118%2Cp_n_feature_keywords_browse-bin%3A4463189011%2Cp_72%3A1248915011&bbn=510118&ie=UTF8&qid=1385971884&rnid=1248913011

thread tension not set correctly.

www.clarkeus.com

simply turn them counter-clockwise