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Post by jjlink on Mar 21, 2016 15:55:57 GMT
Its not causing any problems but the post on part A4 - Extruder Main snapped off soon after I started using the printer. I think that if we modified this part to use a metal bushing rather than the plastic post it would be more solid. I don't have access to Audodesk Inventor so maybe someone who does could modify the drawing and post it along with the bushing dimensions.
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Post by scottadams on Mar 21, 2016 20:43:14 GMT
My post didn't break (but the small tab on A1 main gantry broke in the mail and has broken again after super glue). But that post did seem very fragile. And as it is now my A6 extruder arm is pushing outwards away from the stepper more and more. I'm not sure of the solution, but a metal bushing with a flange might be a step in the right direction. It seems like a redesign of that whole pivot point on the three parts that use it would be beneficial for the long-term reliability of the machine. Maybe something involving these heat set threaded inserts. |
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Post by 3DprintedLife on Mar 21, 2016 21:44:26 GMT
Well good idea with the helicoils but I want to avoid those as they're expensive, are tricky to install, and require a special tap set to use which many people don't have. I still have to keep this printer mostly DIY friendly so it isn't too hard for people who want to to gather and build the printer all on their own! I will do a bit of work on a redesign for this part and when I have a new design I will post an update, a youtube video, and update the printer version to 1.2! This will be on my backburner though so it may take a few weeks.
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Post by jjlink on Mar 21, 2016 23:05:49 GMT
Well good idea with the helicoils but I want to avoid those as they're expensive, are tricky to install, and require a special tap set to use which many people don't have. I still have to keep this printer mostly DIY friendly so it isn't too hard for people who want to to gather and build the printer all on their own! I will do a bit of work on a redesign for this part and when I have a new design I will post an update, a youtube video, and update the printer version to 1.2! This will be on my backburner though so it may take a few weeks. That sounds good; as I said its not really causing any bad problems so backburner is fine. I put a larger washer on the out side of the Extruder Arm to keep it from moving out to far; that is a really strong spring so I'm not surprised the plastic broke. Thanks |
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Post by scottadams on Mar 22, 2016 0:46:58 GMT
I'm not having any issues with this either, but I threw together a potential change that should be easy. It might take a few minutes of extra printing though, and I'm not sure if it will affect the overall strength or not. Basically, I just removed the larger diameter hole and only kept a hole for the M3 bolt to go through A1 Gantry Main and A6 Extruder Arm only. I removed the upper vertical piece from A4 Extruder Main that the broken post was on. Then I thickened A6 Extruder Arm to take it to the Main Gantry. That keeps all the moving parts in the same spots and beefs up the Extruder Arm to prevent the strong spring from potentially forcing it away from the stepper. Incidentally, I put a larger washer on the outside of the Extruder Arm too.  |
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Post by all3dprinting on Mar 22, 2016 2:48:46 GMT
Well good idea with the helicoils but I want to avoid those as they're expensive, are tricky to install, and require a special tap set to use which many people don't have. I still have to keep this printer mostly DIY friendly so it isn't too hard for people who want to to gather and build the printer all on their own! I will do a bit of work on a redesign for this part and when I have a new design I will post an update, a youtube video, and update the printer version to 1.2! This will be on my backburner though so it may take a few weeks. That sounds good; as I said its not really causing any bad problems so backburner is fine. I put a larger washer on the out side of the Extruder Arm to keep it from moving out to far; that is a really strong spring so I'm not surprised the plastic broke. Thanks edit : ignore this, I must have clicked on the wrong post to respond to. If you move the head to the middle and jog and the head moves diagonally. Then one of the motors isn't working. Remove the belt aand check both motors. Find out which isn't moving and check the connection to the board. And my apologies, end stop position is xmin Y max. |
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