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Unread 10-02-2017, 14:57
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Re: new 1.1 compressor blowing 20A fuses

Quote:
Originally Posted by JamesCH95 View Post

Per the 'modifying a pneumatic component' discussion. How is a venting filter, which retains/controls/stores no compressed air at all, a pneumatic component? I am confused, please enlighten me.
It depends on weather it's considered part of the compressor or not. You wouldn't be allowed to modify the bolts that assemble the compressor yet they aren't specifically pneumatic componens either.
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Unread 10-02-2017, 15:06
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Re: new 1.1 compressor blowing 20A fuses

Quote:
Originally Posted by JamesCH95 View Post
@OP:
Per the 'modifying a pneumatic component' discussion. How is a venting filter, which retains/controls/stores no compressed air at all, a pneumatic component? I am confused, please enlighten me.
Point of clarification: it is an inlet filter. I would have more concern with a venting filter since they are actually exposed to pressure. It is part of a COTs pneumatic component. Actually it would need to be part of the compressor since inlet filters aren't a listed allowed component.

From a safety point of view: its trivial. From a strict reading of the rules you cannot modify pneumatic components.
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Unread 10-02-2017, 17:21
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Re: new 1.1 compressor blowing 20A fuses

Quote:
Originally Posted by frcguy View Post
We just ordered and received a 1.1 pump yesterday. How do we know if we have the new filter?
Official AndyMark Update:

Everyone who purchased a 1.1 pump will end up, when all said and done, with the filter on the far left of this graphic.


Full disclosure this is the timeline:
We received 1 shipment of pumps with the filter on the left before kickoff. These sold out in a few weeks and we put the website out of stock until our second shipment arrived. We started sending out pumps from this second shipment without checking to see which filter was included. After a few days we realized that this second shipment had been packed with the grey filter on the right. As soon as we realized this we turned them off on the website, purchased the filter in the middle from a 3rd party and mailed out one per pump to everyone who had bought a pump that was from the second batch. When those people were taken care of we removed and threw out all the grey filters from boxes in inventory and replaced them with the 3rd party filter pictured in the middle. We then received a box of the small black filters from our supplier to make up for the ones they packed incorrectly. Today we realized the thread length issue and as of 4pm 2/10/17 if you order a 1.1 pump it will come with the small black filter pictured on the left.

Right now we are in the process of identifying everyone who ordered a pump from the second shipment and sending out the original, small, black, filter pictured on the left. We strongly recommend that once you receive the small black one you switch it. We have confirmed that there is not an interference problem with this filter as you can see in the pictures below:



Good filter installed on the back plate of the pump not protruding inside.




Bad 3rd party filter sticking past the back plate of the pump to the inside.


If you wish to use the larger black filter until your replacement arrives you should only install it 3 full turns. To assist in this you can wrap the threads in PTFE/"plumbers"/"Teflon" tape so that it will get tight before it bottoms out.
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Unread 10-02-2017, 19:57
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Quote:
Originally Posted by nathannfm View Post
Official AndyMark Update:

Everyone who purchased a 1.1 pump will end up, when all said and done, with the filter on the far left of this graphic.


Full disclosure this is the timeline:
We received 1 shipment of pumps with the filter on the left before kickoff. These sold out in a few weeks and we put the website out of stock until our second shipment arrived. We started sending out pumps from this second shipment without checking to see which filter was included. After a few days we realized that this second shipment had been packed with the grey filter on the right. As soon as we realized this we turned them off on the website, purchased the filter in the middle from a 3rd party and mailed out one per pump to everyone who had bought a pump that was from the second batch. When those people were taken care of we removed and threw out all the grey filters from boxes in inventory and replaced them with the 3rd party filter pictured in the middle. We then received a box of the small black filters from our supplier to make up for the ones they packed incorrectly. Today we realized the thread length issue and as of 4pm 2/10/17 if you order a 1.1 pump it will come with the small black filter pictured on the left.

Right now we are in the process of identifying everyone who ordered a pump from the second shipment and sending out the original, small, black, filter pictured on the left. We strongly recommend that once you receive the small black one you switch it. We have confirmed that there is not an interference problem with this filter as you can see in the pictures below:



Good filter installed on the back plate of the pump not protruding inside.




Bad 3rd party filter sticking past the back plate of the pump to the inside.


If you wish to use the larger black filter until your replacement arrives you should only install it 3 full turns. To assist in this you can wrap the threads in PTFE/"plumbers"/"Teflon" tape so that it will get tight before it bottoms out.


Thanks for the info! It would appear we got one of the bad filters. Awaiting the new one's arrival!
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Unread Yesterday, 05:00
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Re: new 1.1 compressor blowing 20A fuses

Quote:
Originally Posted by fmercier View Post
Would I damage the PCM if I try a 25 A mini fuse?
Not legal.

Instructions show 10 and 20 amp mini fuses
http://wpilib.screenstepslive.com/s/...control-system

Quote:
R55. The fuses in the PDP shall only be replaced with functionally identical fuses (mini automotive blade fuses with values matching those printed on the PDP)
Inspection Checklist under "Electrical", "Components": "certain devices may be repaired with parts identical to the originals including PDP fuses"

https://firstfrc.blob.core.windows.n...nChecklist.pdf
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Unread Yesterday, 07:06
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Re: new 1.1 compressor blowing 20A fuses

To the original post, only one PCM needs to be connected to the PDP output. A second PCM can be wired to a normal output of the PDP under R56. If you use a Spike relay, it can be wired directly to the PDP as long as it is controlled by the RoboRio. No PCM is used to power the compressor but one is needed for sensing the pressure switch.
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Unread Yesterday, 16:41
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Re: new 1.1 compressor blowing 20A fuses

Quote:
Originally Posted by Al Skierkiewicz View Post
To the original post, only one PCM needs to be connected to the PDP output. A second PCM can be wired to a normal output of the PDP under R56.
I don't see a rule that requires a PCM connected to the PDP PCM output, just one that allows a single one connected to that output.


Quote:
Originally Posted by Al Skierkiewicz View Post
If you use a Spike relay, it can be wired directly to the PDP as long as it is controlled by the RoboRio. No PCM is used to power the compressor but one is needed for sensing the pressure switch.
In this configuration R93 requires the pressure switch connected to the RoboRIO, not the PCM.
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Unread Yesterday, 23:55
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Re: new 1.1 compressor blowing 20A fuses

Quote:
Originally Posted by AllenGregoryIV View Post
It depends on weather it's considered part of the compressor or not. You wouldn't be allowed to modify the bolts that assemble the compressor yet they aren't specifically pneumatic componens either.
I can't see failing a team for minor modifications to the inlet filter. If you're considering it integral to the compressor, you're already hosed because removing it = disassembling the compressor, and apparently andymark is advising everyone to do so in some fashion? How to rule if a manufacturer is tell you to modify your part for reasons is a GDC level call, really.

On the other hand, if it's not integral to the compressor, I don't see a problem. Vacuum components aren't pneumatics, and an inlet filter is always at gauge pressure or less, so I agree that it's not particularly a pneumatic component.
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