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# Lab 3 - Log Lathe A Draw a Diagram B Determine the Service...

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Date: 22 April 2010 To: Dr. Mark Zohns From: Roman Ferro Subject: Lab Activity 3 “Bleacher Beaver: Bleacher Plank Scrubber A. Motor Horse Power:      3hp B. Diagram of Power Transmission System     C. Find the Service Factor     SF = Design/Given Given = 3hp Design = 4.04hp SF = 4.04hp/3hp = 1.3 Walnut Sheller A. Determine the Motors Speed and Torque     Torque = 78lb*in Speed = 826 rpm

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B. Draw a Diagram     C. Determine the SF     Power = 92lb*in x (1ft/12in) x (826rev/min) x (2pi/rev) x (min/60sec) x  (hp*sec/550ft*lb)            = 1.21hp Design hp = .26(2.51-2.26) + 2.26 = 2.33 SF = 2.33/1.21      = 1.9

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Unformatted text preview: Log Lathe A. Draw a Diagram B. Determine the Service Factors of Both Systems Given = 3.5 hp (14 tooth) Design = 2.8 SF = 2.8/ 3.5 = .8 Blue Ox II Self-Propelling Wheel A. Determine the Motor’s Speed and Torque Speed = 42 rpm Torque = 1478 lb*in B. Draw a Diagram C. Determine the Factor of Safety Power = 1478lb*in x (ft/12in) x (42rev/min) x (2pi/rev) x (min/60sec) x (hp*sec/550ft*lb) = .985hp Design = .614hp SF = .985hp/.614 = .623...
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