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KoenVanduffel / CR-6_Strain_Gauge_Mounts

Creality CR-6 SE and CR-6 MAX direct drive mounted on the strain gauge design series
GNU General Public License v3.0
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Not really an issue. Can I confirm the strain gauge still functions? #2

Closed RobboCop closed 3 years ago

RobboCop commented 3 years ago

Hi,

Sorry for making this an issue, I don't have much experience on GitHub, so I didn't know another way to ask this question.

From what I can see of the CAD, the mount will surround both sides of the strain gauge. I am guessing that this would render the strain gauge redundant? It's possible that you have allowed sufficient room for the gauge to still function, but I can't tell from just eyeballing it.

Further, your speed boat video starts after the homing process has been completed, so I couldn't tell from that.

The video was impressive though! Did you need to add active cooling for the stepper motors? I know that some people have complained that theirs get quite hot.

ritchiedc commented 3 years ago

The strain gauge still functions. The mount does restrict the gauge from deflecting down by design but it still deflects upward when the nozzle contacts the bed.

KoenVanduffel commented 3 years ago

Thx Ritchie, I can't explain the principle any better. Blocking the downward movement is the aim of the design as it dampens vibration. The upward movement is left free for the bed measurements to function indeed. And I am quite new to GitHub as well, meer to vind out hoe to close issues. :)

KoenVanduffel commented 3 years ago

I didn't comment on the motors. I use a BTT board and Klipper sets a lower current when not moving which keeps the motors much cooler. The move current was increased to 1A, hold 350mA for the Y axis and 850mA 350mA for the X axis respectively.

RobboCop commented 3 years ago

Thanks for the replies gents, that was the news I was hoping for.

Yes there are several separate mods just to prevent the strain gauge moving down to stop the hot end from oscillating/bouncing. So that is a feature really, just couldn't tell if it would still deflect upwards.

Looks like I have some parts to buy then. I got a Prima all metal hot end, but the actual hot end is fastened to the heat break with a tiny grub screw. Applying practically any torque to the steel grub screw simply strips the thread from the alloy heat break... Looks like the micro swiss design is very similar, so I don't really want to buy another setup and be faced with the same issue. Thinking I might just go all in and opt for a setup similar to yours

KoenVanduffel commented 3 years ago

I have no experience with the prima3d or MicroSwiss hotends. They both seem to perform well in printing but might have the disadvantages you describe.

I have ran the Mjolnir Dragon combintion for a while before switching to the Orbiter Dragon combination. The Orbiter extruder has more consistent flow in the higher flow ranges (less than 1% drop in extrusion up to the point where the hotend can't melt the plastic any more) compared to the BMG designs (5 to 7% drop). As long as you are not printing with large nozzles or more than 100 mm/s you won't notice this difference.

Bear in mind however that the Dragon also bas a few small screws. The screws and hotend body have however proven to be of good quality for me as I haven't damaged any of them even though I have fastened and loosened them a few douzen times when developping the mounts.

KoenVanduffel commented 3 years ago

Clarified