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Discussion Starter #41 (Edited)
Mine was running that fast till I cranked up the infill to 100%
I upped the support percent to 40 to make the bottom as smooth as possible.
I also set the speed to 45.

Is "fine" a .2 layer height? Not sure what slicer you use. I use cura but i have never used any of the canned profiles.
 

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Good morning Riven02! How much would you charge an individual for a copy of that armature on the drink holder? Mine fell apart about a year ago and certainly don't want to pay the exorbitant price of new replacement! Thanks!
 

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Id be interested in a couple of these. Mine still works but I'm sure it will break eventually. Can you post info on ordering and cost?
 

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PET is way stronger than ABS - but the addition of the glycol takes care of that. As Riven said, "strength" and "durability" are really subjective based upon the application and the geometry.
 

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Discussion Starter #46
Good morning Riven02! How much would you charge an individual for a copy of that armature on the drink holder? Mine fell apart about a year ago and certainly don't want to pay the exorbitant price of new replacement! Thanks!
For those in the lower 48 I'll get them to you for $12 shipped. If it needs to go to Canada I might need to charge another buck or 2 for shipping.

I have the first set printing right now for CycleCat. I am at work but they appear to be done looking at the web cam.

I am off tomorrow thru Sunday, so I can print as many as you guys want. Please send me a PM. My wife is going to manage the Paypal and shipping for me, and she is watching the inbox.
 

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Crap! That is one expensive printer! :surprise:
I got it "cheap". They sell refurbished printers for less than half price. I bought a DX2 for $2100 which failed. I had some issues with tech support and the VP of sales replaced it as a courtesy. With a new Axiom. Very nice customer support.
 

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Discussion Starter #49
The first batch will go out tomorrow morning.

A couple things to note.

You might notice the pegs are shiny silver. This is because i am test fitting all of these and i use graphite lube in the slots on my cup holder. It makes them run really smoothly.

Another thing is when you assemble yours go easy on thr middle screw. If I tighten it too tight on mine the plates bow in and make it not slide real well and kinda bind up. On an early test model i shortened the pegs so that this wouldn't happen, but then they were loose near the front. So i decided it was best to just not torque it down real tight. The outside screws can be fully tightened.
 

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Gents, to help drive interest in the forum and the fact that you are providing an invaluable service to the Solstice community I mentioned this as a cross post to a couple of Facebook Solstice and Sky sites so you might see an uptick in interest. Thanks for all you all do. It is appreciated. (Group Hug)


Sent from my iPad using Tapatalk
 

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^ CONFUSED ^ - do you mean the glycol reduces the strength, or increases it?
Reduces the tensile strength, but reduces the flex modulus and increases the impact strength.

PET Tensile strength is around 11,500, PETG is around 7,700

Izod Impact for PET is 0.7, for PETG is 1.7. For comparison, ABS has a notched Izod of 7.7 lbs.

So ultimately, it's "strength" is reduced with the glycol, but it's "toughness" is about 2.5 times the PET. So if you were to put a shot put in the PETG cupholder it would likely break but in the PET cupholder it wouldn't. Slapping the cupholder in and out, the PETG cupholder would roll with the punches so to speak where as the PET would be more susceptible to breakage due to repeated impact.
 

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Reduces the tensile strength, but reduces the flex modulus and increases the impact strength.

PET Tensile strength is around 11,500, PETG is around 7,700

Izod Impact for PET is 0.7, for PETG is 1.7. For comparison, ABS has a notched Izod of 7.7 lbs.

So ultimately, it's "strength" is reduced with the glycol, but it's "toughness" is about 2.5 times the PET. So if you were to put a shot put in the PETG cupholder it would likely break but in the PET cupholder it wouldn't. Slapping the cupholder in and out, the PETG cupholder would roll with the punches so to speak where as the PET would be more susceptible to breakage due to repeated impact.
Excellent explanation. The other factor to consider is how the materials age. It's been 25 years since I sat in my MatSci class at WMU, and it was focused on metals and ceramics, so plasticizer loss wasn't something we spent much time on, but what I want for the cup holder part (and the Fiero console skeleton) is something that will flex slightly and repeatedly for a long time without developing stress cracks, and without being saggy.
 

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And then there is that environmental stress cracking brought on by chemical exposure and UV aging, but hell, if you can just print a replacement cupholder arm you just put a couple in your glovebox and and you're good to go!
 

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Discussion Starter #55
I am now caught up. Everyone who has sent payment will have their package sent tomorrow. (Excluding the ones that went out today who I already messaged)
 

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Discussion Starter #57
Yeah i do that when i sleep.
I suggest using the "Print one at a Time" option in Cura when printing multiples. If you dont it prints each layer of each part and bounces back and forth. When going for strength i dont like how much the previous layer cools before the machine makes it back to the original part.
 

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Discussion Starter #58
I wanted to give you guys a durability update.

I have been using mine every day and trying to use it instead of the waterfall ones.

I have been using it a lot with the cell phone holder pictured and with a coffee tumbler.

It hasn't shown any signs of breaking. However, it has deformed slightly. Notice in the image the piece is no longer a perfect circle. It still works but it isn't as smooth as it was originally. Now I really need to use the "pinch technique" after placing something large in it.

I put another one in to try and see how I made it deform. It seems that if I place something large in the cup holder it forces some deformation in the piece due to weight and/or over opening the mechanism. Then, unless the cup holder is closed, it stays in a bind in the deformed form even when the weight is removed. Since I haven't closed my cup holder in a couple weeks the shape seems to have stuck.

I took a heat gun to mine and fixed it, but wanted to let you guys know that heavy things like a 30oz tumbler, or things that lean back and put weight only on the new piece like my super top heavy cell phone holder, seem to cause it to bow. That alone doesn't seem to be an issue as long as you don't leave it that way for an extended period of time, but it eventually did cause mine to drag when shutting the holder.
 

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Not completely familiar but it may be the glycol lends the PETG to higher creep than you'd experience with the ABS. Both are susceptible to stress creep but I suspect the PETG would be worse.

Same concept as a cheap plastic hangar. You put the coat on it and hang it up and everything is fine. Two months later you open the close and find the coat on the floor, hangar all bowed out of shape.
 

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Yeah i do that when i sleep.
I suggest using the "Print one at a Time" option in Cura when printing multiples. If you dont it prints each layer of each part and bounces back and forth. When going for strength i dont like how much the previous layer cools before the machine makes it back to the original part.
Riven, I am interested in a few of these. Maybe 6 actually.
Can you e-mail me a price to ship them to BC Canada please?
V1B 3H4

[email protected]
 
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