[eloid]

Has anyone see and designs with r/p with off the shelf planetary gearbox
Try to get some ideas for tensioning the spur gear into the track with a planetary gearbox?

[Al_The_Man]

Have you seen the post about the Rosta tensioner I used?
http://cnczone.com/forums/showthread...ighlight=rosta
http://www.lovejoy-inc.com/uploadedF...nerDevices.pdf
Al.

[eloid]

Have you seen the post about the Rosta tensioner I used?
http://cnczone.com/forums/showthread...ighlight=rosta
http://www.lovejoy-inc.com/uploadedF...nerDevices.pdf
Al.

which picture had the rosta tensioner

Im planing on using a gear box planatery gearbox direct drive to the rack and pinion, dont see how the tension to maintaned on that rack? please explain.

[Al_The_Man]

In the forum link, post #13 you can see the Rosta component I adapted on the R.H. side.
All of the pictures shown use the same device.
The Rosta parts used are DR-A27X100 BR27 & WS18-27.
These are tensioned by a twisting action and the centre axis can be pre-tensioned to ensure positive engagement, the assembly basically hinges on the Rosta device, these use high tensile rubber as the tension medium.
A picture of the cross section is shown at the top of every page in the Rosta pamphlet PDF.
Al.

[Al_The_Man]

I should have added I held the centre post locked and the motor drive plate was attached to the outer part of the Rosta and allowed to pivot around the locked pin, under tension.
Al.