On April 19, I published a post about the experience of printing the first 10kg of products for the military. Today is August 20, and I have just sent another package, and my filament counter shows - 50kg.
I almost forgot, but I also wrote a short post on June 11 about 25kg printed. Blogging is interesting because you document certain things that you can refer back to later.
For example, for the first 25kg of printed products, I had ~3kg of waste. I sent this plastic for recycling (you can find contacts in the DA chat). And now, my waste package contains ~1.7kg of defective products. That is, almost half as much. This can be explained by the experience gained, as well as the fact that some products require a lot, and all that is needed is to run around changing plates.
About half of the waste at this point is not related to setup issues, etc. For example, a large batch of products broke halfway, and the printer "printed empty" when the filament got stuck in the dryer.
But for general statistics:
50kg of products printed for the PrintArmy
14 shipments via Nova Poshta
~4.7kg of waste or rounded to 10%
12 quality ratings - Excellent. 2 - Unknown (one is still on the way, and I sent the other back in March, and I think people there are not in a hurry to leave ratings)
1958 printed products (some consist of 2 or more parts)
And what about the money?
55kg (products + waste) * 300 UAH (average price for 1kg of plastic including home delivery) = 16,500 UAH
Boxes - I do not account for them, as I use those available at home (animal feed comes in boxes 40x40x35)
Printer maintenance. I will account for electronic expenses separately in another post someday, but overall this hasn't significantly impacted the total. Lubricants, varnish, and spare parts ~ 3500 UAH for the entire time (but I bought a large volume of lubricant, and it will last a long time). I should probably also write a small but separate post about this.
Work and time - priceless ^_^
In total, for 50 kg of very useful products for the army, 23,220 UAH was spent. I do not count the printer and dryer. It is also reasonable to add electronic expenses here, but I do not have the figures right now.
In commercial 3D printing, the price per gram of the finished product is used (the price depends on the layer height and other specifics). The average commercial price that other printers use to calculate their profit in monetary terms is 6 UAH.
So, if we went to a company and ordered 50 kg of products at a price of 6 UAH per gram... We would be quoted a price of 300,000 UAH.
My price per gram of finished product is 0.4644 UAH (23220/50000). To make it easier to remember, I round it to 50 kopecks (I think it will cover the costs of electronics, a roll of tape, etc.).
To summarize. Approximately in 5 months, 50 kg of products for the military have been printed and sent (10kg per month). Monthly expenses are 5000 UAH (on average).
My printer P1S can print more, but there is not always time or opportunity. Printers organize farms with a continuous working cycle. But printing as much as possible (finances and time) is also very important.
By the way, here is an interesting video about a large Ukrainian 3D farm. I definitely recommend watching it if you already have a printer and have printed the first 2-3 kg (then the processes described in the video will be more understandable).
Some DA products are being transferred to thermo-plastic machines, which is a logical step in the evolution of this process. But the load and number of different products for the needs of the army are not decreasing. So do not hesitate and join DA.