pic: 308's Shredded mini CIM pinion

[Ian Curtis]

We've seen similar failures with the AndyMark kit gearboxes. We were never able to confirm how well they were initial greased, but when the gears look like that they probably aren't being greased well. The Andymark grease packets are quite small and may be applied by people who don't know how important it is. We now liberally grease them with our own big bucket of grease to ensure they don't run dry and haven't had another failure.

[MrBydlon]

Originally Posted by Ian Curtis

We've seen similar failures with the AndyMark kit gearboxes. We were never able to confirm how well they were initial greased, but when the gears look like that they probably aren't being greased well. The Andymark grease packets are quite small and may be applied by people who don't know how important it is. We now liberally grease them with our own big bucket of grease to ensure they don't run dry and haven't had another failure.

Count this season as a "lesson learned" for our team. We've never had a robot play this hard, this much, this fast. We have a giant tube of red grease ready for champs.

[Chadfrom308]

The gear was on a miniCIM on a toughbox paired with a big CIM for the drivetrain. We have 4 big CIMs and 4 mini CIMs on our drivetrain(one pair on each mecanum wheel) and this particular wheel was sounding weird. We ended up playing a few more matches on it because the time it takes to replace it.

Anyways, we opened the toughbox mini and a whole bunch of powder fell out of it. Apparently, they were not greased enough.

We used the standard Andymark grease and some of it got lost in the transition. (The toughbox was mounted directly to the chassis)

We replaced it and added as much grease as possible, and so far, no problems

[Iaquinto.Joe]

And despite having one motor less on one corner, the bot still drove straight! It's all due to the fact that each encoder rate is controlled with a PID relative to the driver's inputs. Additionally, a PID is used with our current gyro angle and desired angle. The result is a robot that fights back on it's own when you apply an external force!

[Ben Wolsieffer]

After seeing what happened to your gearbox, I am getting worried that the same thing could happen to us soon because I am pretty sure we only used the grease that was included with the gearboxes.

In 2010, we lost in the quarterfinals partially due to a busted gearbox.