I am only a week into my H2D experience, which is mostly completely positive.
One of the few concerns I have got is about the filament placement recommendations.
I think the logic should be changed slightly to only make recommendations for moving filaments between AMS’s if it has a reasonable benefit.
My latest print for example first recommended I swap every roll between two AMS’s - so that they were exactly the same - just in opposite AMS’s.
Then later after some model refinements I was recommended to make a few filament movements - but tried to see what the impact of using connivence rather than optimal was - and it was only a saving of 0.2g of waste, no time saving and actually 1 more filament change.
So I think maybe there should be a 1 or 2g waste allowance before it recommends you swap rolls around.
Also because my Mac is in a different room to the printer it is a little bit inconvenient trying to remember quite a few AMS filament swaps - which will get worse once I add 2 more AMS’s - so a way of seeing the recommendations on the printer display would be handy too.
Also having Non BL filaments is a bit more awkward too - due to having to tell the printer what changes you have made.
Example - recommendation
Convenience - 0.2g more, with 1 less change
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To be honest, adding more AMS units doesn’t give you additional options for swapping filaments — you still have only two nozzles. For example, red PLA can only be assigned to either the left or the right nozzle, not to anything else. If you already have two AMS units, one assigned to each nozzle, adding more won’t provide extra swapping flexibility.
What it does offer is the possibility to load the same filament into AMS units on both sides, so you can avoid swapping between nozzles altogether.
In my setup, I have one AMS2 and two AMS HT units on the left, as my left nozzle mainly serves as a support nozzle, and two AMS2 and one AMS HT on the right.
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thanks yes I was thinking having some doubles might help reduce the number of swaps.
Might also be needed for multi coloured models needing the full build width.
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Another example of Non Optimal Optimisation on H2D - with a 7 colour print.
BS recommendation - 5 filament on one Nozzle and 2 on the other - so need to connect a 3rd AMS. 22hrs print, 402g, 321 changes.
First attempt at manual optimisation - moving orange over to 2nd AMS - reducing the need for 3 AMS’s. 1g more filament and printing about 2mins longer.
2nd attempt at manual optimisation - move black over too. No of changes saved 10, time saving 20 minutes, total filament saving about 5g. This is the one I am going to go for.
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Another example of “room for improvement” with the H2D filament placement recommendations.
My printer is currently setup as follow:
BS recommended the following placements (right hand side)
So swapping blue, black and light brown around between AMSs.
Total time 3h24m, total filament 18.91g
When I said no - I want to leave the filaments where they are I get this
Then this
So ignoring BS’s recommendation and just leaving filaments where they are is saving me the effort of swapping the filaments around and doing K value stuff again, plus 3 mins print time, plus about 0.5g of filament.
Interesting though the number of filament changes is one more on the quicker print.
I think the algorithm needs work - I hope they improve it for the H2C - because there are a lot more decisions going to need to be made with 7 nozzles.
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