PVT Progress Update
I'm going to pull in the same general list from our last update and give a new update on where we are on those items:
Update on PVT Changes
Enclosure - Unchanged as mentioned last time - no further changes have been made or needed.
Other Parts - Injection Molded - As we mentioned last time we are sticking with ABS for injection molded parts. One of those parts, the spindle the filament reel goes on was warping heavily according to the factory in their test runs, they are reworking the mold to make it hollow to remedy this.
Other Parts - 3D Printed - We've mentioned several times having trouble finding a supplier that can deliver the 3D printed parts (5 total) in the timeline and quality we need - the quality we are seeing doesn't meet the tolerances for easy assembly and high quality printing. We have been working over the last several weeks at moving these parts over to injection molding - sure there is a chance that we could find a better 3D printing factory, but we have spent a lot of time on it and haven't, and injection molding - once the design is tweaked for it - is able to make the part right every time. Add to that, that with injection molding we can get 100% of the parts within a week of approving the samples vs. with 3D printing where we'd get them gradually over the course of a 1-2 months - and it is the way to go. The costs are higher due to the huge cost of the molds but we can afford it in our budget and it is our best option at this point.
What needs to happen for this? -
In order to get these other parts also made with the injection molding process we need to:
Tweak the parts to be injection friendly - this includes making parts thinner, rounding edges, etc. We have done this for 4/5 parts, and expect to finish the last one this weekend.
Get feedback from the injection molding engineers - We have this feedback for 3/5 of the parts, and we will make some little changes (things like hollowing out the spindle mentioned above) to ensure the molding goes well.
Have the molds cut - I know we've had several comments about what a horribly long process injection molds can be - while this project is running very long - it is not because of injection molds, the two we've had made so far have taken about a week to make and a week to wait in line for them to run samples on them. Our parts are fairly simple, don't require cosmetic finishes, and the molds don't require polishing for our parts to work right - this all makes for a much faster molding process. We have just OKed the molds to be cut for 3/5 of the parts.
Get the samples - and if they look good approve them so we can move past PVT!
Circuit Boards - The heated bed PCB - which is aluminium plate bonded to a PCB is being remade, they were not properly bonded in the samples we received, likely they were bonded with a glue that didn't meet the temperature requirements. The factory is now clear about the requirements and is making new samples.
Other PVT issues - We are still receiving samples from alternative suppliers but have at least one supplier lined up for all non-custom parts. We have a preliminary box design and are waiting for the final PVT parts to fully test it.
To Change Your Address: To change your address get your pledge manager link here: https://www.robotic.industries/orders/resend.php and then go to your pledge manager page. Once there change your address and hit "Save Selections"
BUT - We will require you to confirm your address before we ship to you, so you do not need to do this at this time! Please do not send us messages asking us to change your address for you.
One Bounty Left!! - The only bounty left is the Scanner compatibility bounty - which we've doubled the reward amount for! - check it out here: https://github.com/digistump/BuildOne/issues
I want to take a moment again to thank you all - this has turned into a long journey, and I remain eager to get you all some awesome printers!
We will continue to provide updates as we work through getting these parts into injection molding and from there, out of PVT.