Redshift Project Depot

FRC 2016 (Stronghold) => Program Management => Topic started by: Louis L on May 24, 2016, 09:32:19 PM

Title: Post BattleCry things To-Do
Post by: Louis L on May 24, 2016, 09:32:19 PM
Stuff carried over from the previous list (post-NE-CMP things to-do) plus others.

Near term:
Further out on the calendar:
Title: Re: Post BattleCry things To-Do
Post by: Vanshika C on May 25, 2016, 04:40:26 PM
Also, the presentation to the eighth graders at the middle school in late June. I'll let you know the date once the admin at GMS reply to my email.
Title: Re: Post BattleCry things To-Do
Post by: Louis L on May 30, 2016, 12:37:42 AM
Here's an update on robot testing we did today. I looked at several problems. All testing was done over a wireless network.
Hardware - I changed the shape of the limit swith contact arm so that it trips earlier. The key to this working well is that the leaf springs back to its original shape after each use. I'm not totally convinced this is true.
Software - I changed the LabVIEW code so that when it detects the winch limit switch, it continues to pull for another 10ms. This hopefully will reduce or eliminate the chance of the switch bouncing.

Title: Re: Post BattleCry things To-Do
Post by: Ed B on May 30, 2016, 08:04:54 AM
Any experiments of tethered vs wireless to get closer to field conditions?
Title: Re: Post BattleCry things To-Do
Post by: Ed B on May 30, 2016, 08:20:14 AM
The limit switch we added is detecting shooter motion at the end of its travel when it is barely moving. The original (tiny) limit switch on the detent arm is in a much better place, but is subject to sideways motion from. Play in the pivot bearings. Could we redo a switch at that position maybe by adding a pin or screw to the connecting link for a switch to detect without being susceptible to sideways motion? In that position, there should also be much less motion from frame distortion.
Title: Re: Post BattleCry things To-Do
Post by: Louis L on May 30, 2016, 11:07:28 PM
Any experiments of tethered vs wireless to get closer to field conditions?

I only ran wireless. The robot was on my workbench directly in contact with the surface.

But note that any irregularities on the surface translates to more frame contortions. This happens also with changes in tire pressure. I saw this firsthand by moving a single wheel over a workbench bench-dog hole.
Title: Re: Post BattleCry things To-Do
Post by: Louis L on May 30, 2016, 11:09:21 PM
The limit switch we added is detecting shooter motion at the end of its travel when it is barely moving. The original (tiny) limit switch on the detent arm is in a much better place, but is subject to sideways motion from. Play in the pivot bearings. Could we redo a switch at that position maybe by adding a pin or screw to the connecting link for a switch to detect without being susceptible to sideways motion? In that position, there should also be much less motion from frame distortion.

If we're going to get into the guts of the shooter, we should also adjust the hard-stop so that it stops the arm at just the right place.
Title: Re: Post BattleCry things To-Do
Post by: Louis L on June 02, 2016, 01:34:48 PM
Update - after a meeting on Tuesday 5/31, we decided to make the following fixes on 6/1: