CoreXYNZ build
Posted by RodF
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Re: CoreXYNZ build August 06, 2016 12:50AM |
Started on the XY module. I assembled it on the table underneath and it was way out when I put it on my flat epoxy surface. Loosening and re-tightening the screws sorted it out. There is around 0.1mm sag in this X rail as it traverses. I will try a strong back on the rail and see what it does. I still have the option of a single 12mm rail mounted vertically.
Edited 2 time(s). Last edit at 08/06/2016 12:51AM by RodF.
Edited 2 time(s). Last edit at 08/06/2016 12:51AM by RodF.
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Re: CoreXYNZ build August 07, 2016 08:13PM |
Went and got a length of 12x12mm channel 2.5mm wall. This is also going to be used for the door frame. For a quick test I screwed it to the 9mm rail with only 3 screws. This reduced the bend to .05mm (I think it is bend not sag). Once I get some more screws in and shim it a little I should get down to .02mm or less.
Edited 1 time(s). Last edit at 08/07/2016 08:14PM by RodF.
Edited 1 time(s). Last edit at 08/07/2016 08:14PM by RodF.
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Re: CoreXYNZ build August 08, 2016 08:41AM |
Working away at the XY Stage. Everything interacts here so I need to make the X axis idler mounts next. At this point the frame is locked up and the Y axis is too and it is all running smoothly (famous last words).
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Re: CoreXYNZ build August 09, 2016 01:34AM |
Got the idler mounts on. I've got a bit of work to do to get the X axis running nice and freely.
Edited 2 time(s). Last edit at 08/09/2016 08:17AM by RodF.
Edited 2 time(s). Last edit at 08/09/2016 08:17AM by RodF.
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Re: CoreXYNZ build August 09, 2016 02:04AM |
Telescoping guage helped get the X rails parallel. Verniers would do too but the guage was hands free.
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Re: CoreXYNZ build August 10, 2016 05:17AM |
Working on the idler setup. Top reinforcing plate and some spacers.
Edited 4 time(s). Last edit at 08/10/2016 05:23AM by RodF.
Edited 4 time(s). Last edit at 08/10/2016 05:23AM by RodF.
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Re: CoreXYNZ build August 11, 2016 01:20AM |
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hobbymods
I love the way you are giving so much attention to the alignment of the linear rails, I think it will pay off for you.
Hope you're going to use some nicer looking bolts in the end lol
Digital Dentist got me thinking about how I would do the setup. Once I have the parts made I will do the setup. I've left a bit of wriggle room on the hole sizes for that. Got the motors on and went and got some more stainless fasteners
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Re: CoreXYNZ build August 11, 2016 06:21PM |
Made the end idler mounts. Hopefully everything is going to line up nicely. Now on to the belt retainers and tensioners on the extruder carriage.
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Re: CoreXYNZ build August 11, 2016 06:45PM |
It's looking good.
Well done. I am in the middle of drawing my iteration of the coreXY just now. as I draw i am searching for each component as I require them, I found these lovely commercial belt tensioners, I might just try them...
Automatic belt tensioners
Well done. I am in the middle of drawing my iteration of the coreXY just now. as I draw i am searching for each component as I require them, I found these lovely commercial belt tensioners, I might just try them...
Automatic belt tensioners
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Re: CoreXYNZ build August 11, 2016 09:54PM |
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Calvinx66
It's looking good.
Well done. I am in the middle of drawing my iteration of the coreXY just now. as I draw i am searching for each component as I require them, I found these lovely commercial belt tensioners, I might just try them...
Automatic belt tensioners
Cheers, thanks for sharing. This is a good solution. You might want to use the static version. Have a look in this document at the idler section. I posted it at the beginning but it is worth another post. Edit I see the dynamic idlers are lockable
Here is my version of a belt clamp, I need to refine it a bit but it is very effective. I was just going to make an adjustable version for tensioning.
Edited 2 time(s). Last edit at 08/11/2016 10:02PM by RodF.
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Re: CoreXYNZ build August 13, 2016 04:33PM |
Setting up the print bed. This one is for the old printer. Used a counter boring tool for the cap screw heads. The cast plate is actually quite soft to machine.
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Re: CoreXYNZ build August 13, 2016 04:41PM |
Made a custom mount for the dial guage and started playing around with shims. The black foil is 0.06mm, just right. The Y axis is really good ie within .01, the Z is now down to around 0.03mm with a slight sag in the middle.
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Re: CoreXYNZ build August 13, 2016 09:25PM |
Made the thermal fuse holder. Just needs insulation and connectors. Rosie is giving it the once over too.
Edited 2 time(s). Last edit at 08/14/2016 05:29AM by RodF.
Edited 2 time(s). Last edit at 08/14/2016 05:29AM by RodF.
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Re: CoreXYNZ build August 16, 2016 05:28PM |
Not in a great hurry to finish the new printer as I am waiting on the new Duet WiFi to arrive. The new machine needs some ABS printed parts that can handle a heat chamber so I thought I would do the upgrade to my existing machine for a better result. I've got the new aluminium plate bed on with 750W mains heater and sheet of Print Bite on top. Man this thing heats up fast now! The temperature measures about 8 degrees C cooler than the thermister indicates, I'm OK with that. The old machine is currently controlled by a RUMBA board, my plan is to put a Smoothie Board in its place. Just trying to sort out the optimum setup.
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Re: CoreXYNZ build August 18, 2016 12:47AM |
Got my old printer sorted out to print ABS. It still needs an enclosure but is doing the job for now. Can carry on with the Core XYNZ now. I will use the Smoothie Board to get it up and running while I wait for the DuetWIFI. Anyone got any idea of the sweat spot setup for the smoothie board?
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Re: CoreXYNZ build August 19, 2016 01:38AM |
Cheers thanks for the kind words. The fuse is a Fuji Jet Tf158 Deg C 10A 250V S154 S3X1 C. What I was unaware of was that the body is live which I found when I did a insulation test on it. My plan was to mount it to the side of the bed in this aluminium block. So now my plan is to enlarge the hole for it and insulate it with some Kapton tape. So it is work in progress.Quote
Amoniak
Nice build!
Awesome that you keep the thread updated with pictures.
Questions related to the thermal fuse, what fuse are you using and how are you connecting it?
I'm thinking of adding something similar to my own build.
Thanks.
BR//Amoniak
Edited 1 time(s). Last edit at 08/19/2016 01:45AM by RodF.
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Re: CoreXYNZ build August 19, 2016 07:48PM |
I am about to mount the idlers. Have been having this conversation with FA-MAS I hope he doesn't mind if I carry it on here.
The idler has 2 bearings, I got 5mm but you can get 4mm too. If the head of your mounting bolt or spacer is bigger than 7mm it will bind on the outer bearing housing. If you use threaded bolts the fit will be too loose. Also you can't put any compression on the bearings or they will bind. Shoulder bolts with 7mm sleeves are a good option but you are stuck with stock sizes. Another option I have used is to get a long shank bolt and use a die nut to adjust the thread length for an exact fit. My solution is custom spacers turned on the lathe with a threaded hole in each end. More to come, the lawns need mowing right now
The idler has 2 bearings, I got 5mm but you can get 4mm too. If the head of your mounting bolt or spacer is bigger than 7mm it will bind on the outer bearing housing. If you use threaded bolts the fit will be too loose. Also you can't put any compression on the bearings or they will bind. Shoulder bolts with 7mm sleeves are a good option but you are stuck with stock sizes. Another option I have used is to get a long shank bolt and use a die nut to adjust the thread length for an exact fit. My solution is custom spacers turned on the lathe with a threaded hole in each end. More to come, the lawns need mowing right now
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FA-MAS
Thanks. Curious about the bearing part too. Like the inside diameter of it, as well as the thickness of the internal track. Looks to be possibly a 5mm hole. Just wondering if a bolt head too big is going to bind it up.
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RodF
Here you go. I can't seem to insert an image I will in my thread. Anyway inside diameter is 11.94mm, outside diameter is 18mm, inside flanges is 6.4mm, outside flange is 8.6mm.
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FA-MAS
In reply to [forums.reprap.org]
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RodF
Looks like I can fit the XY platform on the mill bed so I can get it flat. However I might investigate getting a piece of granite. Once I get the XY running nicely I will sort out a way of attaching it to the Z axis frame with out distorting it.
Smooth and toothed idlers arrived today. Now I can check the dimensions.
[attachment 80526 idlers.jpg]
Hi, was wondering if you might take a measurement of the bearings in your idlers for me. Specifically the inside diameter as well as the thickness of the innermost ring.
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Re: CoreXYNZ build August 21, 2016 04:35PM |
Made a new extruder mounting plate with lighter material (1.5mm ali instead of 3mm). Added a tab for the cable chain attachment. Found a cable chain design I liked and printed a few test pieces. I have now reverse engineered it into a parametric model so I can easily change size and angle limits.
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Re: CoreXYNZ build August 22, 2016 11:45PM |
I've been reworking the XY system. Reversed the motors(BTW have ordered .9 degree motors). Incorporated cable chain mounts. Simplified it a bit. I have had some 1.3mm titanium sheet laying about so I thought I would use that for the idler mounts.
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Re: CoreXYNZ build August 24, 2016 03:25AM |
Made a titanium idler base but it was too flexible. The 3mm ali was much stiffer.
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Re: CoreXYNZ build August 24, 2016 05:08AM |
Made new 3mm ali idler base plates also top reinforcing plates from titanium. Got started on the ali spacers.
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Re: CoreXYNZ build August 25, 2016 01:27AM |
Made idler mounts and spacing washers. Parted the washers with drill inserted so the little washer doesn't fly off and never be seen again.
Edited 2 time(s). Last edit at 08/25/2016 01:33AM by RodF.
Edited 2 time(s). Last edit at 08/25/2016 01:33AM by RodF.
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Re: CoreXYNZ build August 27, 2016 10:47PM |
Made shafts and spacers for the end idlers. Also needed to make new mounts for them. This pretty much completes the metal part of the build on the XY axis.
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Re: CoreXYNZ build August 28, 2016 10:34AM |
Here is the complete XY axis I need to reprint the plastic parts as they have changed slightly. Have to install the belts and check the geometry.
Edited 1 time(s). Last edit at 08/28/2016 10:34AM by RodF.
Edited 1 time(s). Last edit at 08/28/2016 10:34AM by RodF.
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Re: CoreXYNZ build August 28, 2016 10:51AM |
This is how the belt tension adjustment will work. I think the design is a bit clunky so I am keeping an open mind on that.
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