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SoliForum - 3D Printing Community → Help/Repair/Maintenance → I made a boo boo
Somehow I have worn my lawsy mk5 extruder assembly out to such a point that the whole barrel and nozzle raise up a bit on every retraction, and then of course lower on every feed. Aside from the clacking it makes, the dammed thing works fine. Watching it work, it almost looks natural, like it should do that anyway, lift the print head when needed, then lower and ride on the hydrostatic pressure(?). Is a floating print head bad?
It would almost certainly give you poor resolution. But if it were my rig, I would be more worried about it wearing down to the point where it falls out completely and causing a serious fire hazard. Print a new body as soon as you can to be safe.
Mine does the exact same thing foofoodog. I have another MK5 printed for when (if) the current one fails, but don't have any plans to install it soon. Having it lift on retracts prevents it from scraping the top of the layer when the extruder is traveling 
It would almost certainly give you poor resolution..
I am not seeing that to be the case. Given how it works it is like having a "dynamic fluid" bed leveler.
>>causing a serious fire hazard
Really, please explain to me exactly how this whole thing bursting into pieces is going to start a fire?
So we have a hard short on 12v dc and the firmware thermistor check does not catch the runaway, and we don't blow a fuse before the fat resistor goes up in smoke, and it is laying on a pile of ramen ABS and is not in its metal housing. I am just wondering, I am tempted to see if I can make it happen.
AZERATE wrote:It would almost certainly give you poor resolution..
I am not seeing that to be the case. Given how it works it is like having a "dynamic fluid" bed leveler.
>>causing a serious fire hazard
Really, please explain to me exactly how this whole thing bursting into pieces is going to start a fire?So we have a hard short on 12v dc and the firmware thermistor check does not catch the runaway, and we don't blow a fuse before the fat resistor goes up in smoke, and it is laying on a pile of ramen ABS and is not in its metal housing. I am just wondering, I am tempted to see if I can make it happen.
Meant to type "*I think* it would...". Kinda hard to proof read when a toddler is crawling up your leg 
I can see how it could cause a fire hazard. If the hotend loosens up enough to wiggle its way out of the extruder, it could fall onto a print, a possible corner catching the thermistor wire and pulling it loose/snapping the line. I know this is a 1 in a trillion possibility, but Murphy's law always shows up to my door. If I am missing something to that regard, please correct me. 
Nope, you have a toddler so you worry, I understand. You might worry more about your floor fan smoking out than these things, which we are lucky if they work at all most days.
Case in point the oil filled space heater company that replaced a many years old unit of mine out of warranty after if failed dramatically with a melted face plate. They very eagerly wanted that unit back from me, paid shipping and replaced it with a newer one.
Mine does the exact same thing foofoodog.
What hath god wrought?
Once something starts moving the rate it wears out will increase dramatically... I'd probably prefer a rigid hot end overall...
OK, yeah, so I printed out and bolted on a nice and tight new one. It was fun while it lasted.
SoliForum - 3D Printing Community → Help/Repair/Maintenance → I made a boo boo
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