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Hi spd748 Whoa there my 11,127lbin is only for starting and moving the carriage, won't you need some more torque for the carriage while sawing the log and also what about drum intertia, friction,efficiency etc. Unless you ahead of me lol, I was looking into the sawing of wood see what I could find. Your torque figure about right for one second, it depends on how much rolling friction you assume you have. desertfox

OK,let's try this. Take the input as a crank 1 foot in length and apply 1 pound of force to it giving 1 pound- foot of torque. Next evaluate the gear ratio formula  I gave as R1/S2. For the sake of this discussion, let's say it is 34. Now take the 1 pound of torque at the input and divide it by 34, giving 1/34 pound-foot at the output. With efficiency considerations, it would be slightly less.  

Can T = F . d by used? what I am after at this stage is how to use the above in order to arrive to the answer which I see that you maybe able to obtain it via other ways as indicated previously using efficiency and power. If 1 foot-pound is applied at I and using T=Fd, what are the steps in order to calculate the T at the output shaft O? d = distance = the distance from the axis of rotation to the pitch circle of a gear. Would the input...

Ed, The picture is of a mill similar to mine. The design and operation of the drive system is the same. You are correct. High production is not a primary concern. I would however like to make the system as reliable as possible. My mill is designed to produce ~8-10k board feet per day. On a good day where nothing goes wrong and my back holds out I produce ~6k board feet. This mill is a part time job/hobby. My purpose in converting to...

This mill will solve all your problems with speeds, feeds, and horsepower. You must watch the movie. h ttp://www. doublecut. com/sawmil l_detail.a sp?mill=14 Look  at the lower right side of this page there are a few formulas that may help. http://www.thinkerf.com/FreeLit.htm Sawyers information links galore http://www.xmission.com/~sherwin/sawyer1.htm  

I'll work on a solution when I get a chance.  For a complete solution there are actually four cases to be solved: static and sliding friction for each direction.  The difference between the static and sliding cases is just the coefficent of friction used.   -b

( This link will provide some information about hydrostatic drives. http://hyd raulics.ea ton.com/pr oducts/pdf s/E-PUPI-M C002-E.pdf The carriage drive I worked on used a lever on the swash plate to control speed and direction. You can use an open center variable volume piston pump into an electrically controlled directional control valve driving a 10000 series Charlynn to reduce costs. The pump volume \(speed of travel\) would still be...

I am sure Spirol can make them, but I am not sure if your purchasing quantity is sufficient to make it feasible for them to do so.

We'll be operating at a steady stat temperature between 60-80C. The cell will be very well insulated. I'm not familiar with the bolt coatings you mentioned. Where can I find more information on this? (Vendor, requirements, properties etc)

Been there and done that as well.  Well not injected parts but fairly precise machined components +/-0.000X" tolerance range.  Sheets were faked and bearing locking compound was used to seat the bearing on the shaft.  Pretty bad when runout on a shaft was around 0.040".  Inspect, inspect and inspect some more and keep records and photos of every...