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Cat drinking pond

by JohK, published

Cat drinking pond by JohK Dec 17, 2012

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Description

This is a cat drinking pond that takes soda bottles (like coke, pepsi, etc) with a pco028 thread as a reservoir. The water level is kept constant without the need for permanent monitoring on your side.
All corners and edges are nicely rounded so your tippy-toe doesn't hurt itself - also it looks much better.

L**** the cat: "Yay, I can haz water *purr*"

Got inspired by the "pond for small animals", my thing is a complete redesign though.

Recent Comments

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hi,
i only have a 15X15cm printer, could you upload one that is slightly smaller? i cant just scale it down because of the thread.
That would be awesome =)
Hi, usually I prefer using OpenSCAD for my small private projects as well, but in this case using Pro/Engineer was much quicker (this object was less than 60mins of modelling!). I can export different formats like .stl, .stp not scad; afaik none of these will help you import the model into openSCAD.What modifications do you have in mind?
Heya, I am wanting to change/edit the item posted. I'm an openscad user, and having issues importing the stl files due to errors. Are you able to export to scad per chance?

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Instructions

Print the cat-drinkpond.stl file:
Please make sure to use a "food safe" plastic to not put your pet's health at risk. Extruding the plastic through a brass nozzle might increase the lead content of final product. (Also see the discussion below)
I got good results with PLA, .35mm nozzle at .2mm layer height. I also used 4 perimeters and 5 top layers to make it watertight. You might get away with fewer layers and perimeters, but I didn't want to take a risk.
Then go and find some empty PET-bottle (no pun intended) that has a PCO028 thread (coke bottle, or similar thick-walled bottle). Fill the bottle with water and screw it into the socket of the pond. I would suggest the small .5l or the 1l size at max. any bigger than that and the pond will probably tip over quite easily.
I designed this thing to be massive and survive everyday use: before you print, double check the gcode so you don't waste plastic on a useless non-watertight print.

If you already have a bowl that you like to use with a bottle as a reservoir you can also print the cat-drinkpond-tower.stl, which basically is a stand for the bottle with some openings. You'd have to fix the bottle somehow to avoid that your cat tips it over, though.

I got rid of the "work in progress". The thing is massive and if I need another copy, I will probably go back and tweak the design a bit in order to save some plastic. Until then it works the way it currently is. Also I'm very satisfied with the threaded socket, it holds a 1 liter bottle very firmly.



hi,
i only have a 15X15cm printer, could you upload one that is slightly smaller? i cant just scale it down because of the thread.
That would be awesome =)
Heya, I am wanting to change/edit the item posted. I'm an openscad user, and having issues importing the stl files due to errors. Are you able to export to scad per chance?
Hi, usually I prefer using OpenSCAD for my small private projects as well, but in this case using Pro/Engineer was much quicker (this object was less than 60mins of modelling!). I can export different formats like .stl, .stp not scad; afaik none of these will help you import the model into openSCAD.What modifications do you have in mind?
The cat in the photo looks like it could be my cat's twin! Coloring is almost exactly the same but my cat would be a little bit older. His name is Cow :)
Half the comments are about the pets health.. I guess these people never seen an animal eat its own crap before.
They have given warnings about PLA not being food-safe which includes liquids. The composition of PLA and anything that you eat or drink out of it can harm humans and animals. I don't recommend this for anyone's pet.. not unless you seal it with a food-safe epoxy.
PLA is corn based, so it is food safe.
It's not the corn that will kill you, it's the additives. I've only seen one brand of PLA stating FDA approved for food contact. I'd be cautious of PLA from china or any where the actual manufacturer is not known.
Example of additives
http://www.specialchem4polymers.com/product-directory/pla-polylactic-acid_4_10808/index.aspx?d=1
loving it - I will use the tower for instant water supply for my turtles.

Thank's for the idea!
Pretty cool. It can be used also to water the birds outside.
They are particularly thirty in winter.
Definitively something I will print soon !!
The identity of kitties involved have been redacted to protect the innocent.
PLA will degrade alot faster when wet all the time and sunlight isnt helping on that one too.
JohK - in reply to yzorg
I did some research into PLA degrading earlier this year and really couldn't find too much about. In essence the results of my research was: PLA is far from environmentally friendly (stuff is used during production! stuff!). Also degrading of small PLA chips in special reactors has a timescale of years.

If you have any more detailed information on this, I'd be really interested.
All I know is that PLA is one of the plastics used in dissolvable stitches. Presumably:
1) The products aren't toxic in small quantities
2) It does dissolve, these stitches take about 3 months.

Blood is warm and slightly alkaline so will probably break down PLA significantly faster, and the bodies immune system may also be able to attack it.

Considering how thick that part is, I don't think its going to fail any time soon, and it should go soft before it fails anyway.

However, just because something is safe for humans doesn't make it safe for animals. Cooking with teflon pans can kill a bird if it happens to be in the kitchen at the time but is harmless to humans.
I'd assume the plastic used in dissolvable stitches differs a fair bit from 3D printer filament.
Wikipedia says one of the materials used is PLA: en.wikipedia.org/wiki/Dissolving_stitches#Materials
Well, now we have a use for all that extrudate we create when priming for a print. Just need to find a needle with a big enough eye...
Hey i know that cat! I think she lives next door!!!11
JohK - in reply to Yell0w
oh noes.
There are components of 3D printers that the PLA touches that may make it not safe for your pet to drink out of. I personally would be concerned about the long term effects it could have on a pet's health. I don't think it would be immediately harmful, but could in the long run cause health problems.
Hmm not sure about this. If I follow the path of the PLA through the hotend, it would in my case touch the following materials:
-> PLA (cold, guide) -> ABS (cold, extruder) -> Steel (cold, bearing, extruding wheel) -> ABS (cold, extruder) -> PTFE (cold to hot, liner) -> brass (hot, nozzle).
I don't think there is anything transfered to it while it is cold, except there is ABS-abrasion. The hot PTFE contact should be very comparable to your typical PTFE-coated frying pan. Also at the Temperatures below 250C PTFE is chemically stable. Afaik, brass is food safe?

Can you be more specific and elaborate what exactly you are concerned about?
dev - in reply to JohK
the brass in the hot nozzle, contains 5% lead
All depends on the source & time of making. See en.wikipedia.org/wiki/Brass#Lead_content (esp. the reference to keys - we seem to have survived that). Also note the extruder type affects this, many have PTFE down most of the tube, so only the small melt area is exposed.
Anyway we all gotta die of something...
JohK - in reply to dev
also see my comment further below.
is it food safe PLA?
JohK - in reply to donb
Is there a european supplier who guarantees food safety for his PLA? To my experience the suppliers are resellers who are unable to tell you the constitution according to the relevant DIN/ISO norms... I wouldn't really trust any "food-safe label" if they can't even recite the datasheet of the original manufacturer.

BUT, this was the only PLA that I have that has zero smell while printing (this is something I learned for children plastic toys: if it smells, it's probably not healthy). Also from the stiff feel to this filament and being the natural type it shouldn't have any flexibilizers in it, which eliminates another source of unhealthy constistutents.

The main point I'm still concerned of is the color, depending on what it used to color the filament it might be slightly poisonous. In my next batch there I will use natural PLA without coloring to eliminate this risk.
dev - in reply to JohK
I dont think its the pla per say, from what I've read there are components that may contain traces of lead in the pla path of the extrusion as well as the unknown path from the supplier.. even trace lead contamination is poisonous. aside from that I appreciate the creativity
JohK - in reply to dev
Do you know of any quantitative data about lead in typical filament after extrusion? Could you also post some of the links were you got your infos from?

In earlier days when we had lead pipes for water, the problem of lead poisoning would actually arise when the water sat for an extended period in the pipes and had the time to acquire higher concentrations of lead. (Faucets made from lead containing brass were actually made until the late 80s).

My guess would be, that due to the little contact time the filament and the brass actually have, there isn't much mass transfer taking place. So the concentration of lead in the final plastic product should be in the ppm range at max? The concentration of lead in the water will be even lower, probably by orders of magnitude? What is in the filament originally (flexibilizers, etc) is probably a lot worse.
dev - in reply to JohK
I think the fact that the hot end reaches high temperatures would magnify the ppm problem.. on my list I plan to print something and have it tested for lead
Got results ?
havent got around to it yet (forgot about it actually).. thanks for reminding me, I'll make an inquiry to my connection
LOL  like the block out cat.  reminds me of a Trailer Park Boys episode; they blurred the cat's identity :)
Secret Operative Ninja Cat ;)
I do value customer privacy!
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