mendel complete kit.
Posted by james villeneuve
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Re: mendel complete kit. February 20, 2010 03:08AM |
as for the parts, they are molded, not injection molded. that means they may have some small bubbles internally. it does not effect strength or durability at all. the parts are strong enough no matter what. it allows for fast building of parts. the only parts that are hdpe and not urethane are the y axis under the table body, this is because the part requires greater precision. you can look through my videos and find out more youtube.com and look for profounddevices and my videos should show.
If anyone truely has questions about the strength of the parts, let me know your name and address and i will send you a few parts. you will see they are strong as regular plastic, and although not precision +/- .1mm they are well within anything a reprap prints. i will send out parts up to 5 people, preferably schools, and public club forums. state your name, who you are and what your relation is with reprap as well as your address. simple as that
James
James
If anyone truely has questions about the strength of the parts, let me know your name and address and i will send you a few parts. you will see they are strong as regular plastic, and although not precision +/- .1mm they are well within anything a reprap prints. i will send out parts up to 5 people, preferably schools, and public club forums. state your name, who you are and what your relation is with reprap as well as your address. simple as that
James
James
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Re: mendel complete kit. February 20, 2010 04:57AM |
spacexula,
i just uploaded that bearing less y axis you wanted onto thingy verse. i uploaded y rod mounts, y motor holder, and the fingered frictionless snap in place design of the y slide table.
here it is [www.thingiverse.com]
Now why don't you be a good boy, ok? then i can focus on uploading more stuff and focus on more instruction videos.
instructions here:
youtube.com/watch?v=vkC-9tpHo1A
youtube.com/watch?v=Y5Gho6oxj0M
just so you know the designing i'm doing right now is to speed up the creation of my mendels 'catalysts' I've already made 4 different printers over a coarse of 2 years. if you want here is the first ugly one i call the 'beast'
[www.youtube.com]
this is for laughs only. it was not until mendel did i figure out a proper and affordable z axis. this video is of x and y table only. this video is really old. I've been designing for a while now.....
i just uploaded that bearing less y axis you wanted onto thingy verse. i uploaded y rod mounts, y motor holder, and the fingered frictionless snap in place design of the y slide table.
here it is [www.thingiverse.com]
Now why don't you be a good boy, ok?
then i can focus on uploading more stuff and focus on more instruction videos.instructions here:
youtube.com/watch?v=vkC-9tpHo1A
youtube.com/watch?v=Y5Gho6oxj0M
just so you know the designing i'm doing right now is to speed up the creation of my mendels 'catalysts' I've already made 4 different printers over a coarse of 2 years. if you want here is the first ugly one i call the 'beast'
[www.youtube.com]
this is for laughs only. it was not until mendel did i figure out a proper and affordable z axis. this video is of x and y table only. this video is really old. I've been designing for a while now.....
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Re: mendel complete kit. February 20, 2010 10:35AM |
james villeneuve Wrote:
> Now why don't you be a good boy, ok? then i can
> focus on uploading more stuff and focus on more
> instruction videos.
Trust me I am being a "good boy".
A good portion of my pst was pointing out you are not some nutter who has never ran a bussiness, that your name really is James Villeneuve, and that you have produced kits before.
That is called being nice to someone who is trying to start a business.
If people want to send some guy off the internet $400 for a kit that doesn't exist yet, well Caveat emptor and good luck to you sir.
repraplogphase.blogspot.com
> Now why don't you be a good boy, ok?
then i can> focus on uploading more stuff and focus on more
> instruction videos.
Trust me I am being a "good boy".
A good portion of my pst was pointing out you are not some nutter who has never ran a bussiness, that your name really is James Villeneuve, and that you have produced kits before.
That is called being nice to someone who is trying to start a business.
If people want to send some guy off the internet $400 for a kit that doesn't exist yet, well Caveat emptor and good luck to you sir.
repraplogphase.blogspot.com
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Re: mendel complete kit. February 25, 2010 07:55PM |
@Michael
Thats exactly what I was planning to do. I have quite a bit of time on my hands and I'll be happy to share my notes and photos of the build with everyone.
Thats exactly what I was planning to do. I have quite a bit of time on my hands and I'll be happy to share my notes and photos of the build with everyone.
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Re: mendel complete kit. February 25, 2010 09:16PM |
Hello all,
I wasn't sure if I should add my two cents to the dialog here, but I finally decided to because I am hoping it will help the community. I really like what James is trying to do. But I also agree with spacexula that James should be careful selling his product without having it printing yet. He has made some big design changes, hopefully for the best.
So without choosing a side, I thought it might be good for me to share my results with a similar machine and the problems I have run into. I had already built a cnc mill before I started trying to build my Mendel. Since I had the mill we were able to mill several of the parts from stock plastic and assemble a frame, but we eventually ran out of parts that could be made on a 3-axis mill easily. So we decided to attach a plastruder from makerbot to the mill and print with it.
Some specs about my system (Annabelle, am I the only one that names my machines?). It is a lead screw design, using precision acme thread 1/2"-10. So the diameter of the screw is 1/2" and it has 10-turns per inch. I am driving them with Nema23 motor from makerbot. and controlling them with version 2.3 stepper controllers from makerbot. My machine was designed to move slower and have more pushing power because it was used as a mill and need to push a endmill bit into material, where the 3d printers do not. So already it is slower then it could be.
So here are my results. While we can move the machine at speed around 40mm/s we can not print at that speed. When we first started we were losing steps and we failed at printing parts. We had to slow our machine down to 7mm/s to avoid losing steps. This makes printing parts take around 2-3 hours each. I am so glad we only need to print about 1/3 of the parts to build our Mendel. But we do get pretty good results at these settings. Photos at the end of my post.
My concerns are these. While James has shown that he can move his system at much faster speeds, I believe 70mm/s, that does not mean you can print at those speeds. Stepper motors can lose steps very easily and the gcode generated changes direction thousands of times. I use SkeineForge to make my gcode and it does not include acceleration control for the motors. This means the motors try to go from stationary all the way to max speed and back to stationary instantly. My understanding is that James added more weight in the form of washers to help avoid binding by having more inertia. This is fine for running at the max speed, but might be a problem when you try to change direction thousands of times without losing steps.
My second concern is that he is using regular v threaded rod. I am a mechanical engineer, and I know that this type of rod is not designed to be used as a lead screw. That is why acme thread, and precision acme thread were created. It makes me cringe a little when I see it. However, the Mendel design uses it for the z-axis as well, and I have seen many other people build projects using it this way. That being said, I will be putting acme thread on my Mendel as one of the first modifications.
Here are some photos. I hope my results help the community a little.
Cheers,
Josh Updyke
Edited 2 time(s). Last edit at 02/25/2010 09:20PM by jupdyke.
I wasn't sure if I should add my two cents to the dialog here, but I finally decided to because I am hoping it will help the community. I really like what James is trying to do. But I also agree with spacexula that James should be careful selling his product without having it printing yet. He has made some big design changes, hopefully for the best.
So without choosing a side, I thought it might be good for me to share my results with a similar machine and the problems I have run into. I had already built a cnc mill before I started trying to build my Mendel. Since I had the mill we were able to mill several of the parts from stock plastic and assemble a frame, but we eventually ran out of parts that could be made on a 3-axis mill easily. So we decided to attach a plastruder from makerbot to the mill and print with it.
Some specs about my system (Annabelle, am I the only one that names my machines?). It is a lead screw design, using precision acme thread 1/2"-10. So the diameter of the screw is 1/2" and it has 10-turns per inch. I am driving them with Nema23 motor from makerbot. and controlling them with version 2.3 stepper controllers from makerbot. My machine was designed to move slower and have more pushing power because it was used as a mill and need to push a endmill bit into material, where the 3d printers do not. So already it is slower then it could be.
So here are my results. While we can move the machine at speed around 40mm/s we can not print at that speed. When we first started we were losing steps and we failed at printing parts. We had to slow our machine down to 7mm/s to avoid losing steps. This makes printing parts take around 2-3 hours each. I am so glad we only need to print about 1/3 of the parts to build our Mendel. But we do get pretty good results at these settings. Photos at the end of my post.
My concerns are these. While James has shown that he can move his system at much faster speeds, I believe 70mm/s, that does not mean you can print at those speeds. Stepper motors can lose steps very easily and the gcode generated changes direction thousands of times. I use SkeineForge to make my gcode and it does not include acceleration control for the motors. This means the motors try to go from stationary all the way to max speed and back to stationary instantly. My understanding is that James added more weight in the form of washers to help avoid binding by having more inertia. This is fine for running at the max speed, but might be a problem when you try to change direction thousands of times without losing steps.
My second concern is that he is using regular v threaded rod. I am a mechanical engineer, and I know that this type of rod is not designed to be used as a lead screw. That is why acme thread, and precision acme thread were created. It makes me cringe a little when I see it. However, the Mendel design uses it for the z-axis as well, and I have seen many other people build projects using it this way. That being said, I will be putting acme thread on my Mendel as one of the first modifications.
Here are some photos. I hope my results help the community a little.
Cheers,
Josh Updyke
Edited 2 time(s). Last edit at 02/25/2010 09:20PM by jupdyke.
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Re: mendel complete kit. February 26, 2010 05:44AM |
Josh,
Any interest in documenting your machine up on the wiki?
[objects.reprap.org]
or
[objects.reprap.org]
Using
[objects.reprap.org]
As a template.
There is a lot of interest in extruded aluminum RepStraps.
[objects.reprap.org]
[objects.reprap.org]
-Sebastien, RepRap.org library gnome.
Remember, you're all RepRap developers (once you've joined the super-secret developer mailing list), and the wiki, RepRap.org, [reprap.org] is for everyone and everything!
Any interest in documenting your machine up on the wiki?
[objects.reprap.org]
or
[objects.reprap.org]
Using
[objects.reprap.org]
As a template.
There is a lot of interest in extruded aluminum RepStraps.
[objects.reprap.org]
[objects.reprap.org]
-Sebastien, RepRap.org library gnome.
Remember, you're all RepRap developers (once you've joined the super-secret developer mailing list), and the wiki, RepRap.org, [reprap.org] is for everyone and everything!
Sorry, only registered users may post in this forum.