All Things BOXZY *Unofficial*
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CKP343

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Reply with quote  #1 
Is the nozzle piece removable from the heat block?  What mm size does boxzy come with?  I am having trouble with my filament slipping and I have tried so many things to combat it.   I think my nozzle may be too small or damaged.   What do I need to order to go to a .4mm?  Do i have to put on a whole new heat block or can I simply remove the tip and get new ones on amazon?
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Drunken Boxzer

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Reply with quote  #2 
The standard nozzle size is 0.4mm. Have you checked to make sure your feeder is properly tensioned? What temperature are you extruding at, and does any plastic come out when fed through?
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CKP343

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Reply with quote  #3 
The tensioner is maxed out I actually have to shove a pliers in it to give it more tension so it doesn't slip.  I'm printing at 210.  Yes the plastic comes through when pushed and heated with a torch.  I have another 3D printer that I never had feeding issues with.  I have had feeding issues with boxzy right away.
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Drunken Boxzer

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Reply with quote  #4 
That's interesting. I'm assuming pla? When you tightened the tensioner did you test with a piece of paper? I'm wondering if the screw perhaps stripped out and it's not getting tight enough. On the other hand, have you tried cleaning the nozzle? If you don't want to take it apart I've had luck turning up the nozzle to 240c and pushing 100mm through.

If you're having to heat up the nozzle with more than the heating element perhaps there's an issue with the thermistor or the heating element.
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CKP343

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Reply with quote  #5 
The tensioner fell apart when I first started printing so possibly I reassembled it wrong?  the nozzle is heating up to proper temperature I just disassembled it to make sure everything was right.   Once I forced the tensioner to be tighter it was over applying PLA.  But without the tensioner being tight it was under applying.  I can deal with over applying by turning the flow rate down but when it slips turning it up only makes it worse.   I got pretty frustrated today I started having adhesion issues so I rigged up the heated bed from my old printer and hopefully that solves that [smile]   I LOVE HEATED BEDS
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CKP343

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Reply with quote  #6 
What I mean by the tensioner being maxed out is the bolt doesn't do anything besides hold the spring in place.   The only source of tension is the spring, that's it.   Tightening the bolt only makes the grip LESS on the filament.
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Stealth

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Reply with quote  #7 
CKP343,

There should be no tension on the tensioner. In fact the use of the bolt doesn't make sense to me because BoXZY only uses 1.75MM filament and there is no reason to lesson tension on the filament. When you have too little tension this is what causes slipping. The tensioner is designed that when you tighten the screw you take tension away from 1.75mm filament. Something I did after my first print was remove the screw entirely. I taped it to the back of my boXZY just below the tensioner. With it removed all tensions should be on the filament. 

Do you see dust from the filament grinding around or below the 2 wheels that push and pull the filament? What brand filament are you using? A second cause for poor feeding or for feeding to stop is shifts in the size of the filament, which will cause the tensioner to "chew" through the filament at which point it will lose tension and continue to slip until you either manually push past the point it chewed into the filament or you remove the filament and cut and remove up to the point the chew mark is located. Personally the design of the tensioner is poor and needs improvement. Even if you use larger filament and need to make use of the screw the vibration from the feeder cause the screw to loosen and fall out after a few hours of printing.
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ajablu

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Reply with quote  #8 
The force of the spring determines the maximum amount of pressure that can be applied to the filament. If the screw is all the way backed out and you are still experiencing slippage it could be that there is an obstruction in the nozzle or some other problem. Clogs are somewhat common in new printers as there are often bits of manufacturing residue left behind. If that's not the problem you can increase the amount of pressure applied by adding a washer or two so that the spring is under greater compression.
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CKP343

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Reply with quote  #9 
I only experienced slipping on my old printer when things went horribly wrong. I understand the tensioner and how it works. Boxzys tensioner is backwards. Which will never work. So I shoved an Allen wrench in between the spring and the housing. No more slipping and plenty of tension. I am currently using esun PETG. I was printing with hatch box and maker bot filaments.
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