St Taw. A Tool Changing 3D Printer
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- Опубліковано 17 жов 2024
- A 3D Tool Changing printer called ‘St Taw’. Inspired by seeing E3D Tool Changer at TCT show in 2018. No open source plans available so all designed from scratch. Major differences include increased build volume, different Z axis arrangement. Work in progress...
Please share your plans, I would like to build such a printer.
Why should I waste my time at the computer when you've done such a good job?
Your design is perfect.
I think it would take me more time to compile software than to design the machine. His design is served in front of you.
I already own a cnc router. I'm just getting back into 3d printing. Took a break because of cnc work. I to will probably venture into combining both machines to create a sweet one like you have shown. I already have a large frame built with a stationary bed and all axis move, with a top roller section attached to the Z for stability.
Very nice printer you've built!
What material are you using for the heated bed insulation? This is one of the first homebuilt designs I've seen that actually uses the manufacturer-recommended heater pad retention assembly. Great stuff!
The self adhesive 240v self adhesive silicon heat pad is insulated by a 10mm thick Cork floor tile. This is then retained by an aluminium plate. Has worked now for over 3 years without problems.
Nice work, tool changer creme de la creme in 3d printing. So what tools are you planing for? ;-)
How did you make a t shaped thingi that goes into the torque thingi.
What is it called? I've been trying so many ideas on making on but the are all bulky due the 3d printed nature.
Its a piece of tool steel, cross drilled with a thinner piece of tool steel. I would call it the key. The lock receiver is machined on a milling machine.
Awesome. Simply awesome. I also tried replicating the E3D printer, but not with Duet and toolchange. Just loved the design and wanted a super stable CoreXY. Video on my channel.
I'm so jealous! personally i'm working on a magnetic tool changer :3 It works surprisngly well so far without the tool changes ofc xD but i picked it up and put it back a few times by hand and it worked ok
Well done! Looks like a very solid machine.
Any chance to help share the duet config files for others trying to begin learning how to get tool changers working? :(
really cool work and great that you are using a direct drive instead of a bowden. i have used a dual extruder in the past and given up due to all the ooze issues and i have a removable second extruder which is just mount if it is absolutely necessary to use it. I have seen all these videos on tool changes and there exist 2 approaches . 1 : to use a magnetic (or electromagnetic mount ) and 2 is to use a kinematic mount. But no one have actually done a comparison to see which is a better approach . The magnetic one is much simpler to execute but i am not sure y is e3d perusing a kinematic joint ? is there a more advantage to this overengineering or a magnetic joint would suffice for normal mortals?
The kinamatic mount is really the way it is located to ensure repeatable xyz location. The method of securing it could be magnetic or mechanical. So you could have a magnetic kinamatic mount. The mechanical key method probably provides a greater securing force.
I have had two extruders running. A bowden and direct drive. The bowden using e3d components required a retract of 4mm. The direct drive i am able to get away with 1mm retract. However the direct drive is much more heavy and feels top heavy. I am waiting for components to try a Zesty Nimble remote drive extruder. This may be the best of both worlds.
Hope to provide an update video soon.
Another question, why did you move the front two ballscrews so far away from the front of the machine? seems like a lot of wasted bed space
The pulleys under the base are about 16mm from front edge. The sides and base edge covers will be 5 or 6mm plastic. So there will be a 10mm clearance . So yes they could have moved forward but only by about 5mm.
Looks promising, nice work!
Very well done... I see many have asked all-ready to have access to your design plans, I am working on many models myself, and I would really like to try your build version. TX
Very nice work!
I will to build e3d TC.. With big bed 30cm3.. Many of parts will buy from e3d but I'm worried about software.. How they do it/you do it? And how close to original is your machene.. So i can start prepering (collecting parts)?
The controller is duetwifi. It is fully configurable. I do not believe they have a special version. E3d have not published plans as far as i know. So i don't know how close i am.
@@sainttaw2616 we will see in half a year or more.. And I will slowly collect parts
can't wait for part 2
Perfect design will follow
Are you going to share the study as open source?
When done I would be happy to. However unless you have access to cnc etc I would wait for E3D tool changing heads. I guess the main machine frame as a larger version of E3D may be usefull for some. Thanks for comments.
thank you for your answer
I will follow.....
Nice design. I was thinking about something similar in future but I have some unresolved roadblocks. How do You handle tool changing in duet? As I understand tpreN.g handle taking the tool and tfreeN.g to put it away. But do duet remember witch tool it have after reset or emergency stop? And if not how do you handle to put unknown tool on its resting place?
This is something I have yet to learn. I currently have user defined macros to load and unload tools. Even then, I have mistakenly unloaded tool 1 into tool 0 slot which was occupied. Sensors in main head could detect which tool it has. Two digital inputs could give binary reading of tool number. Not sure if duet could utilise this though.
@@sainttaw2616 You could just put 4 endstops in the resting positions to detect if a tool is present
Don´t get me wrong, i like your design, it is Really nice, But this is what e3d wanted to avoid, having another 5 million standards that are very similar. If you´re going to open source it, it will just create confusion. BUT. If i would build my own, i would make it similar to yours, with just the toolchanger heads from e3d.Yours is superior in many ways, for example the 3 linear rails for Z and the closed frame up top.
I agree. I am no advocating my design of tool changer over theirs. I guess the design of the frame, bed an Z axis may be of interest. I also have a direct drive head in prototype. I expect they are working on one also but have not seen any details.
@@sainttaw2616 E3D showed a concept drawing of a direct drive toolhead during Sanjay's talk about the toolchanger last year. Iirc it had a smaller motor just to assist the main motor for flexible filaments.
It will be interesting how that performs. If they don't extrude at the same rate due to slip or slightly different diameter hobs you could imagine some tension or compression building up in the bowden tube. If they have to be calibrated thats added complexity. Still if the head hob was smooth or rubber this might resolve that.
I do like the idea of one standard for tool changers, but that would require people to share the design. Until there is a shared standard there will be lots of variations. After all the CNC world is full of standards.
Why not share it ? I don't understand, if it's just "showing off" that's sad.
It's just sharing ideas. I think anyone going to the trouble of making such a thing will have their own ideas.
@@sainttaw2616 nice.. :-) Amazing design you did there. I would build one myself but i dont have time right now. Three ball screws, six rails and a lot of custom work I see, not to mention duet mobo combo. BTW did you cut your bed from the top plate?
@@marcbrann Yes the bed was from top plate material
@@sainttaw2616 and thats how it suposed to be done :-). I like designs like this. Well thought out.
where did you buy this knupling parts
The are all made by me.
Did you assamble how do you fix them in place and where did you buy this small ball
The metal is machined to have a recess and the ball is then a pressed fit. It is also glued in with expoxy resin. They are ball bearings I had which are 4.7mm diameter.
3D Print enthusiasts think everything is free they yell "Stl's"
Nice design, will you be sharing it? Check out Joshua Vasquez channel as well, he's also working on an E3D inspired tool changer.
Servos Wear out very fast afaik