What is the max length you can get from first of a pneumatic piston
check http://www.bimba.com/techctr/first_free_frm.htm see exactly.
but i believe
for 3/4 Bore the max stroke is 10 inchs
and for 1 1/2" and 2" the max stroke length is 24"
See page 19 of the Pneumatics Manual.
'1-1/2" bore only goes to 11" stroke.
The order form is on the last page of the Pneumatics Manual.
It’s at: http://www2.usfirst.org/2005comp/Manuals/2005PneumaticsManual.pdf
i was going off the bimba website, which lists upto a 24" stroke length for the 1 1/2" bore size. The last page of the manual says to check the website for available stroke lengths for each bore size.
are there any limitations on the size of the pistons?
is a 1 and 1/16 inch bore and 24inch stroke piston allowd?
You have a choice of 3/4" bore, 1 1/2" bore and 2" bore. You can order the amount of stroke you require
Page #7 of the pneumatics manual.
See above for the available stroke lengths in each bore.
for this year,can we use pistons out side of the kit?
Please see page 19 of the Pneumatics Manual for all the cylinders and other pneumatic components (other then fitting and tubing) you can use on your 2005 FRC competition robot. <R91> also allows the TI Pressure Transducer and single action solenoid from the 2004 FRC KOP as legal for use this year. But other then those cylinders “pistons”] on the pneumatics order form for this year, no you can not use cylinders from out side of the 2005 FRC Kit Of Parts.
Just a note, the order form on page 19 of the pneumatics manual does not list 24" for a stroke length for the 1-1/2" bore, but it also says “Please check the Bimba web site for available strokes in each bore size”. Page 7 of the pneumatics manual also says “You can order the amount of stroke you require.”, implying you can get whatever stroke you need (of course assuming its avalible). As said by oneangrydwarf the bimba site does list 24" stroke cylinders in 1-1/2" bore, which means you can get it.
Also, rule <R91> says you may use last year’s kit pneumatic cylinders and solenoid valves - last year our team recieved two 24" stroke 1-1/2" bore cylinders as part of our 3 free cylinders, meaning we can use these because the rule says any cylinder avalible in the kit last year is also legal this year.
:eek:
I’ve searched this site and read the rules and pneumatics manual over and over again. Can anyone answer this question once and for all?
Can a team use a piston other than the ones offered for free by Bimba? For instance: Bimba make a 1 1/16" dia. piston with a 24" stroke. Is this allowable? I understand that Bimba will only give away the ones listed on their site (3/4", 1 1/2", 2") but if we are purchasing pistons, what range of diameter are we limited to?
Thanks.
This is my final answer - 3/4", 1 1/2" and 2".
This question has been answered many times and i will answer it again.
You have the choice from three (3) different bore sizes [piston diameters] to choose from and use this year on your 2005 FRC competition Robot. These three bore sizes are 3/4", 1-1/2" and 2".
You can find the strokes available for these three bores on page 19 of the 2005 FRC Pneumatics Manual
In the spirit of gracious professionalism, Thanks!
:o
Thank you. It was not entirely clear that teams were limited to those piston dia. only. We had ordered a 1 1/16" X 24" piston that I was able to cancel. I apologize for making rookie mistakes.
I think the problem is that the manual seems to conflict itself a little.
The robot material flow chart says:
A purchased cylinder or rotary actuator identical to those available on the Custom Cylinder Order Form?
But, from the order form:
Please check the Bimba web site for available strokes in each bore size
To me, that means, other than the sizes listed here which you can get for free just by filling out this form, check the web site for available strokes. So, Bimba would just have to make and stock a larger number of cylinders in these sizes instead of stocking all their sizes…
And really, it’s the bore size that is the deciding factor. As long as it’s 3/4", 1 1/2", or 2" and off the shelf from Bimba, it should be OK…
Not trying to “get away” with anything, just think a small clarification could be helpful…
For a definitive answer, I suggest you post your question to FIRST:
It’s been asked several times already, all unanswered… Waiting for the reply.
I was just trying to calm this thread down a little by mentioning that there might be a little confusion from the way it’s written, that’s all.
Also <R38> of section 5.3.4.2 says:
“Specific items allowed include:
• Additional HITEC HS-322S servos
• Additional Victor 884 Speed Controllers and Spike Relays, as needed.
• Additional solenoid valves, air cylinders, and connecting fittings”
stating you are allowed additional cylinders, and not even hinting towards any sort of restriction that may be applied to such items. I know the flowchart and pneumatics manual say different, but it is another conflicting rule.