Hello All - I have received an email back from Gates Denver. The GT2 with 5mm pitch has a specific stiffness of 86,000 lbf per inch (Thank you Michael Bruha) . The AT5 has a specific stiffness of 100,500 lbs per inch. Now I have a number. By the way the ATL5 is 133,600 lbf per inch.
Mactec - I have not used the ATL because it is twice the cost per metre and I have to order it special through a company that I prefer not to deal with. I can get C7 ballscrews for less $/m then using an ATL belt system.
My belt drive machines use open belts and they have their own difficulties....My products are cost sensitive and I have to make cost vs performance decisions on every part in the machine to get the machine to the required build cost. Mactec you seem to not understand that wringing technical and commercial information from some companies is a difficult task. You make your own parts to your spec and thats great, I have to live with commercial parts where possible and with customers that don't want to spend a lot of money. This business development phase has been an interesting experience. Precision costs exponentially as you get more precise. I don't disagree with many of the things you say its all relative to the product and its the relative statements that get us into trouble so I prefer to stick to the numbers. Peter
In this little foray I have also come across pulleys that are for AT (and others) belts with less clearance and claim zero backlash, so pulleys could be a good solution if needed. Breco have std, reduced and zero backlash spec... see page 8
https://www.brecoflex.com/wp-content...ley_july08.pdf