ah... shoulda expected responses like this... Not trying to revolutionize the 3d printer world. Just thought I'd try and get a sturdier cantilevered print bed. And from what I've seen, I'm achieving that. To me, the backlash will be cleared / negligible during each movement. My little wooden MDF Mendel90 has produced great accurate prints for years now, with almost no maintenance/adjustments.by Mogal - CoreXY Machines
Not understanding the exaggeration of the error here? Remember, this is a corexy. The bed moving down (for the Z lift) then back up would clear that 0.0381mm backlash. I guess it could be an issue with other machines depending on configs? Even so, printing at a 0.3mm layer height, the 0.0381mm of backlash is an error of only 0.01% - (I can't get a circle to print inside of that accuracy!) And rby Mogal - CoreXY Machines
Being as I still have motor movement, but no comms, I can still do this: A quick vid of the repeatability There is 0.0015" (0.0381mm) backlash. Not an issue when printing though...by Mogal - CoreXY Machines
Well, I'll be down until I get a new ramps board. One of them little sticky heatsinks fell of and shorted out one of the drivers, not only that, the moment it shorted, I got the 'disconnect' sound from windows. I changed out the driver, and the board boots up, everything moves, but one of the limit switches logic is backwards, so I need to reflash it. I cant get it talking to the computer anymoby Mogal - CoreXY Machines
Stronger then a second screw? Nope, but super simple to implement and still makes for a sturdier build plate. I don't think lag is possible as its mechanically locked. (as the vid with no rails shows) One side moves up, the other side has no choice but to move down and visa versa. String tension may adjust with temperature, but even so, it would be minimal. The aluminum frame would be a biggerby Mogal - CoreXY Machines
Thanks MKSA! good link. Similar but I'm still using the threaded rod for the movement, not the strings. Yes, Ed3D once I get the printer running properly (Get the firmware going) I'll definitely be getting a dial on it. I also want to reconfigure the bed frame, but need more 2020 for that. If you scroll up, I had done a few preliminary tests, it reduced the deflection by about 2/3rds. (From 0.6by Mogal - CoreXY Machines
I've been struggling with this for a couple days now... I've taken Tech2C's Config H file (with sensor) and the new Marlin release (1.1.9) config H file And tried to get a working firmware, but just can't seem to get it. I once managed to get it to home all axis, but turned around and messed it up. I have a PNP proximity sensor hooked up, and looking to get the auto bed levelling working with itby Mogal - CoreXY Machines
LOL nope, never considered that! but interesting concept. Not too sure that it would be steady enough without the rods. I would still use the Z rails, but doubling up on the cables would sure make everything super steady. I have enough parts and pieces to implement it, if I get some time I may try it out. I'm reconfiguring the build platform so... (Still need to get the firmware properly configuby Mogal - CoreXY Machines
UPDATE!! LOL one day I'll finish this thing! Couple small videos to show: Part one shows some z travel with the z rails removed. You can see the effects of the lead screw wobble. Part two is with the Z rails installed and the system buttery smooth.by Mogal - CoreXY Machines
Yes the framework looks cantilevered the long way, but it'll be a square bed... The 2020 bed frame is 500mm x 240mm. The frame is currently 500mm x 500mm with an undetermined Z height so far. I have a 300mm x 300mm mirror for the bed to start with. I don't have all those answers yet, but I hope to when I'm done. It's a work in progress. Thanks for the questions, as I will look into them as the bby Mogal - CoreXY Machines
Here's a small video of the sliding table. Demonstrates how everything is balanced on the Spectra Lines, with no rails used. 3D Printer Slidding Table Videoby Mogal - CoreXY Machines
I guess I should also point out that the bed extrusions are 500mm. If your putting together a smaller 200mm bed, the deflection would be much less.by Mogal - CoreXY Machines
Well, I got some parts and pieces, but still not everything I was however able to get the Sliding knot hooked up. Not a complete success, but still pretty good. The deflection ultimately got reduced from 23 thou to 8. Not too bad considering I used a 745gram weight. If your print is that big... LOL There is no noticeable 'Extra tension' in the Z Lift from the Sliding Knot (as the forces balanby Mogal - CoreXY Machines
Put a Bubble Level on the bed and watch it as it goes down. Does the bubble move from the original spot as the print progresses? My other thought, is there is no real support on the left and right side of the table, kinda balanced in the middle by the belts. If there is any play in the Z axis rails, the bed may shift(Tilt) (like your video shows) - Your Z axis might not be rigid enough.by Mogal - CoreXY Machines
Yes, everything must be parallel, just like the XY belts. Yes, the table extrusions will need to be all long as the frame to incorporate the bearings for the cables. Or, as you've pointed out, add upper and lower extrusions for cable anchor points. The bed size can be whatever size you want within the confines of the frame. Once I get a chance I will get some better drawings posted.by Mogal - CoreXY Machines
Project is in limbo, as half my eBay order hasn't shown up yet... Got a few disputes open, and other parts ordered.by Mogal - CoreXY Machines
Just wondering if anyone else is having this problem. - I haven't printed for awhile (just over a year, so maybe its the roll?) But the roll is coming close to the end, and the filament is wrapped so tight around the spool, its tough to run roll it. (Even by hand!) And as it coils off the roll, it twists and bends all over the place. I'm having to pull it off by hand so it doesn't stall out.by Mogal - General
I will be building the standard cantilevered design, and using the cables to add that extra support. There wont be a whole lot of tension on the cables(spectra line) and with the locations at the corners, I wouldn't think there would be any deflection at all. I think realistically, there would only be a couple of pounds tension on the strings. The Tantillus utilizes 65lb spectra line, and it hadby Mogal - CoreXY Machines
I don't know why did didn't think of this earlier. I've already implemented this on my CNC machine. Now its time to put it to use on the 3D Printer! I'm still designing it, but have the basis down. I have V groove bearings and some 80lb spectra line I'm going to use. I'm building a new CoreXY, based off the Hypercube 3D printer by Tech2C. Hypercube 3D - youtube channel I'm still waiting on partby Mogal - CoreXY Machines
I don't think we're going to get that video.by Mogal - CoreXY Machines
I say that because my Mendel90 of the last five plus years is currently printing out its replacement. I have been extremely satisfied with the printer and would like to thank Nophead for the great reliable design. A few quirks I've had with the machine are the Z axis height adjustment and Y axis belt tension. And the X axis belt breaking twice. Over the last 6 or so months, I have noticed the plby Mogal - Mendel90
WOW! Quote2014 | Mixed Media | approx. 80 x 100 x 20 microns 2015 Guinness World Record for "The smallest sculpture of a human form"by Mogal - General
Hey guys, this has been put on the back burner for now, but I am still interested in pursuing this later one. these will be used as training aids, and not in any system operation. I've looked at the tesla vale, but gate, ball, globe, needle valves was the direction I was heading....by Mogal - Object repositories
Yes, I looked at JTech, I sent them an email, but go no response... makes me wonder...? I'm thinking I can piece one together on ebay for half the price.by Mogal - Laser Cutter Working Group
Hi, just wondering what laser did you get? Did you get a kit/all in one? cost? (ebay?) Thanks Chrisby Mogal - Laser Cutter Working Group
Would you mind posting some pics/examples of what you have done? I'm leaning towards the 2.8w version...? I already have Mach3 and would set it up to have the power controlled through gcode.by Mogal - Laser Cutter Working Group
I'm seriously considering a diode laser for my CNC machine as well. I have NO idea where to start, but an all in package for starters would be great. Googling lead me to this link. I'm excited JTech offers three laser combo kits, 1.7w, 2.2w, 2.8w kits. I'd like some examples of what each power rating would offer to help me make an informed choice as to which kit to purchase. The 2.2 seems toby Mogal - Laser Cutter Working Group
I considered converting my CNC, and quickly came to the conclussion that it is not a good idea. Being as you use your mill allot, down time is important. Well, prints can take MANY hours more then cutting. Not only that, keeping things clean when printing... Dust get everywhere, even with a proper vacuum setup. Pros: Single machine for multiple uses Cons: Speed - Slow 3d printing Cleanliness -by Mogal - General