Probably seen all the issues printing a nylon 12 GF over the past year and this thread is coming off the current and continuing trouble shooting with Formlabs to make it work.
I’m going to do a detailed “cost breakdown” of this system if you are looking at this system for production running parts… in a later thread but… right now something else drew my attention….
As I run a test print to add to the high cost of Nylon 12 GF and the fact I have had to run at 70% refresh rate (throwing half my material in the trash)… with me doing all this troubleshooting and emptying of the hopper countless times (otherwise I probably wouldn’t have noticed) On this print…
I started with a clean hopper and added one cartridge (6kg) of 70% refreshed nylons 12 GF into the hopper. It of course filled this hopper to the 6kg mark in the hopper.
Notice that Preform has been estimating this print to need 3.89kg of total powder.
Also notice in the photo that the job is not even halfway complete…
Now notice where the hopper level is at
Now folks again it was level with the “6L” mark… as you can see it’s well below what I’d assume the “3L” mark to be at halfway done… (why is everything to do with this machine kg but the hopper…I bring this up below)
Based on our current issues…needing to run production parts above 70% …combined with our well thought out system of contracting manufacturing costs with the machines hourly rate, the labor in post processing, maintenance and the current high refresh needed and cost of materials… we are already on the fence at break even trying to do production with this machine and material…now it’s possibly using double material of what Preform is estimating.
I’m going to let this machine run tonight to be sure (yes I confirmed Preform told me I needed 3.89kg and yes I confirmed I had 6kg and enough for the job…as per the print job pre checklist) but off what we’re seeing it won’t make it over 3/4 of the way through and is shy about 3kg at least (double the estimate)
So folks on top of the high costs and us spending a year trying to make production running this thing a possibility… we may be figuring out that these parts need ”double”…in the material estimate than what’s been given.
Stay tuned… and anyone else calibrated enough to see how far off Preform estimates?
Anyone wanna take a bet if this print job makes it through with the 2kg left over that it says…or even makes it through the print?
Or…am I totally off here as I am a bit confused on why everything Formlabs does with the material is in KG (the bottles, PreForms estimates, the printer dialog) but the Hopper is in Liters… I’m an American not European so someone feel free to correct me if I’m wrong here…
But I just got the the warning and the hopper is empty from “6L” of a 3.89kg estimated print…and its just over halfway through.
I just had to add another cartridge…
So if I am correct…and not losing my mind here and confused on kg versus the Hopper using L… this estimate from PreForm would be for $356.22 of powder for 80 parts in a half chamber but in reality need nearly $712.43 worth of powder at double but I think based off what I am seeing it will need more… So my $4.45 per part material costs may be more like $8.90+…
This whole system with support and getting this thing to run as advertised has been a long year process so sorry its late and I stand corrected if someone can tell me I don’t know the difference between 1kg and 1L… but if I am right this is a deal breaker in production running and/or at least quoting a job correctly.
Please tell me I’m not reading this right