BrianE22 - thanks for the info
LittleInch - yes you are right with the figures you gave, 4 pole is around 1500rpm. I forgot to mention that I will be using a 15:1 gearbox to get the speed to around 100rpm, and then use the inverter to vary it between 100 and 50rpm. What I didn't realise is...
SuperSalad,
My colleague, who has done lots of hacksaw testing, thinks that the most effective way use a hacksaw is putting your weight into the saw on the stroke, then taking it off one backstroke (so not lifting it up, but it is the same effect as doing so). This, combined with us wanting...
Hi 3DDave,
Thank you for that, I suppose the problem I have with performing your calculation is that I do not know how to calculate the frictional force. Assuming this is very low, however, I would assume that a 750w motor will be sufficient, providing that it has enough torque to complete the...
Hi SuperSalad,
Thanks for the link, that is interesting.
Yes, we are trying to see how resistant our components are to hacksaw attacks and also just have a consistent method of testing. At the moment we are doing it manually and of course this is very inconsistent. Also there are companies...
Hi all,
I work for a bikelock company and have been given a project to make a hacksaw machine. I am essentially copying the machine found in this video, skip to 1 minute and 17 seconds.
https://www.youtube.com/watch?v=Yh46F3we1-M
I have settled upon a 0.75kw three phase motor using a single...
