Yes, spring loaded. It doesn t seem like it would happen if the tension was fixed. David is right something has to be flexing. -XandonMessage 1 of 41 , Jan 25View SourceYes, spring loaded. It doesn't seem like it would happen if the tension was fixed. David is right something has to be flexing.-XandonOn Jan 25, 2013, at 10:08 PM, KM6VV wrote:
I can see how a sudden reversal of direction could cause problems. You had two spring-loaded tension arms? I just have one fixed tensioning idler wheel per 8" span. I have acceleration/deceleration ramps to deal with that.
Yes, I had hoped to be able to run the motor belt (3" c-c) without an idler. No room! but it makes it very difficult to get the belt on the pulleys, and on the motor shaft. The shims I'm using to adjust and tighten-up the belt were to take care of that. One could be a little tighter, but they both can ratchet (jump) teeth.
But you know the sound of the ratchet I'm talking about. Almost a "brap" when it ratchets multiple times.
David, Thanks. I m still not finding the exact motor, http://electromate.com/db_support/downloads/PittmanExpress2011Catalog.pdf but I get the idea. 45 oz-inMessage 41 of 41 , Jan 26View SourceDavid,
Thanks. I'm still not finding the exact motor,
but I get the idea. 45 oz-in 142 RPM ??
my 10 kgf-cm = 138.873866 oz-in. So maybe I've just got too much
torque? I like my ground speed so far, should be 6-7 MPH with the
1:1.533 gears I have. 1:1 gears would give me about 4.5 MPH.
On 1/26/2013 4:13 PM, dpa_io wrote:
> Alan, yes motors are 24 volt Pittman GM9413J820 (or something like that) with 20:1 gear reduction and 500 CPR encoder.
Drive pulley is 15 tooth and main pulley 30 tooth.