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Looking for feedback (Patreon)

Published:
2022-03-28 11:08:52
Edited:
2022-03-29 17:21:25
Imported:
2024-07
Tags:

Content

Hi Everyone,

I hope you are all fine and healthy!

I am looking for feedback of the new extruder for the next release. Any type of feedback is welcome, even small details or esthetic, good or bad, everything is welcome! Also, you could share feedback even if you are not using the extruder now or even to have printed the parts.

You could write them it in the comments bellow, or send me a private message via Patreon, Twitter (@gregoiresaunier), Discord (gregsaun#0545) or why not opening an issue on GitHub ( https://github.com/gregsaun/bear_extruder_and_x_axis/issues ).

Thank you in advance :)

Comments

Ben Hewitt

I think I like the idea and I have considered it for my Baby Bear build but it just feels wrong to sleeve the Micro thread. I'm sure it works and I have a motor and Bondtech kit but given the current price and availability of the Revo Micro I'm toying with other options at the minute. Have you seen the direct mount Voron heatsink?

Grégoire Saunier
>>81055651

This is very good point Ben and I understand your concern. Like you I don't think the thread is a good idea to be honest but the solution I provide is fixing it. You have to consider that it is not like a standard groove mount. The V shape and the tolerance makes it self tightening, it is not going to move. I could make the printed groove mount hexagonal or squarish but this is would just make the design unnecessarily complex, as it is today it does not rotate, not even with ABS that is more "slippery" than PETG. If I see people reporting issue on rotation I would update for sure and this is something I am monitoring at the moment. Also the problem you may have seen with groove mount on V6 is not present with Micro because there is no more hot tightening and the cables can be rotated all around the heatsink. There is almost no reason anymore to access the heatsink. The only reasons would be reprinting the extruder or removing dust from the fan, which are two things you will not do everyday at all. Another point you might think of is that the current filament path length is longer due to this mount. In reality it dependents on the front fan size, motor plate screws and print gear tensioner and not the heatsink mount solution. So using the Voron heatsink would not reduce the filament path. Plus not having a too short filament path also provides some benefit like damping a bit moire. I might miss something but in my case I only see disadvantages by using Voron heatsink: - The mount needs two screws compared to my solution so it would actually be an heavier solution - Hard to confirm as CAD is not available but it seems the surface of contact with air seems smaller and so lower performance on cooling - The heatsink shape would make the extruder body unnecessarily more complex to design without benefit -It is not available yet and not part of the standard hotend I hope it helps you to clarify this point and if not please do not hesitate to ask :)

Ron Lockwood

I just assembled the new extruder... still building the bear so haven't printed yet. My main feedback is that the quick instructions need some cleaning up. there were a few steps that were hard to follow and I had to play around to figure it out and had to undo a few steps to go back an fix. Cable mgmt missing except for the pinda cable. I like that your broke the back plate into two pieces. would it work if instead of coming through the middle of the plate with the cables, notch the sides instead? then you don't have to remove the plate to perform maintenance on the cables. Also, was thinking of a way to get the thermistor and heater cables up into the cable guide. Just a personal thing, but it bugs me how the cable wrap bulges where the bottom two cables enter in. I'm probably not explaining this very well...so feel free to ask me what I'm trying to say ;)

Grégoire Saunier
>>83993334

HI Ron, thanks a lot for the feedback. Next version will have a better cable management for the filament sensor, the Pinda and the front fan. For the back plate this is a feature we had already on BearExxa V1 since a long time, happy you like it. You can't come to the side as this would make it incompatible with stock Prusa frame (cables would touch the frame) and maybe Bear frame too. It is also grouping the cables together for the textile sleeve. For the hotend cables, there are two issue: the cables are getting hot and they are a bit rigid (and so fragile). This is why they have their more straight path from the bottom. Don't hesitate if you see other points, always happy to improve :)