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Re: Moving a mass for ten seconds

Posted: January 30th, 2010, 7:57 pm
by Flavorflav
Question: if the step after the motor is the hydraulics (two syringes), would you count the next action as being initiated as soon as the plunger of the syringe begins to move the fluid, or not until the other plunger acts on its target?

Re: Moving a mass for ten seconds

Posted: January 31st, 2010, 12:47 pm
by zcshiner
Flavorflav wrote:Question: if the step after the motor is the hydraulics (two syringes), would you count the next action as being initiated as soon as the plunger of the syringe begins to move the fluid, or not until the other plunger acts on its target?
The rules state "Activate either Pneumatics or Hydraulics in an enclosed system that leads to the next action."

Because it says "activate" I would consider the step being initiated as soon as the plunger begins to move the fluid. The step following the hydraulics would be initiated when the plunger acts on it's target.

Re: Moving a mass for ten seconds

Posted: January 31st, 2010, 1:21 pm
by Flavorflav
Okay, thanks, that's pretty much what I was thinking. The judges will have to watch that carefully, then.

Re: Moving a mass for ten seconds

Posted: February 5th, 2010, 11:06 pm
by cypressfalls Robert
Does anyone know where to find any speed rduction gearboxes?

Re: Moving a mass for ten seconds

Posted: February 5th, 2010, 11:39 pm
by fleet130

Re: Moving a mass for ten seconds

Posted: February 5th, 2010, 11:52 pm
by cypressfalls Robert
which one of those is speed reduction? I only see speed increasing gearboxes.

Re: Moving a mass for ten seconds

Posted: February 6th, 2010, 12:40 am
by longliveemomusic
Hmm, is everyone here attempting the string and motor method of moving the mass?

I'm using a rly long piece of threaded metal rod and a slow motor to move a block of wood along the threads of the rod.
This method is okay right?

Re: Moving a mass for ten seconds

Posted: February 6th, 2010, 1:55 am
by Flavorflav
cypressfalls Robert wrote:
which one of those is speed reduction? I only see speed increasing gearboxes.
Look again.
longliveemomusic wrote:Hmm, is everyone here attempting the string and motor method of moving the mass?

I'm using a rly long piece of threaded metal rod and a slow motor to move a block of wood along the threads of the rod.
This method is okay right?
Absolutely. People use string because it is easier to set up, but your method is more reliable (no tangles).

Re: Moving a mass for ten seconds

Posted: February 6th, 2010, 12:08 pm
by fleet130
cypressfalls Robert wrote:which one of those is speed reduction? I only see speed increasing gearboxes.
I think you must be looking at the ratios backwards, they are all speed reducing.

Re: Moving a mass for ten seconds

Posted: February 17th, 2010, 7:53 am
by Gooblah
Can this task be combined with the golf ball movement?

This is my first year doing this event in Division C (I did it in Division B, but that's a whole different ballgame). I was thinking having a motor/string method pull the golf ball slowly up 30 cm.

To be honest, it seems like a lot of these tasks can be combined in order to simplify the machine's design and construction....