QuoteMKSA Quotethe_digital_dentist ..... Your CAD model looks like you have put bearings on the ends of the screws, but if I understand what you're doing correctly, the screws aren't going to rotate, so bearings won't be needed. Congratulation doc, you are the only one who spotted the obvious fault ! In fact, the screw WILL rotate at an unpredictable speed depending on nut friction and counter mby andornot - CoreXY Machines
Here is the design of my z axis in more detail: you can see from this picture the three z axis supporting the bed, each of the columns have a ball joint connected to the bed to allow it to tilt by moving the any of the z axis columns. The ball joint also has movement in the x or y plane (depending which column it is) to allow for the change in length between the centres of the ball joints.by andornot - CoreXY Machines
QuoteMKSA You were the first to claim we misunderstand, isn't ? OK, then I will wait for your proper drawing. I have read several of your recent posts and all you have done is criticised their designs, what machines have you designed?by andornot - CoreXY Machines
QuoteMKSA Quoteandornot I think there is a misunderstanding on how i propose the z axis will work, let me draw it properly in 3d cad and then i will post it on this thread. By the look of just your Z system, it is clear it is over constrained. Concepts you seem to misunderstand. A proper CAD package will show you what is wrong when you assemble the parts. Now, quite frankly, you should try toby andornot - CoreXY Machines
Quotethe_digital_dentist Quotethe_digital_dentist The Z axis will be much less prone to wobble if you use fully supported linear guides instead of end supported round rails. Using two of them at the front of the machine and just the screw at the back will provide all the stability and guidance needed. i am using a three screw system for bed levelling, the end supported round rails are only beingby andornot - CoreXY Machines
Thanks for all the advice and info so far, i will take a look at my design and consider the best way forward.by andornot - CoreXY Machines
Quoteprot0typ1cal If you're going for totally enclosed, might suggest moving motors outside the enclosure. The A and B steppers could be below, and have a shaft through the center hole of the extrusion to the top where you'd mount a pulley. One of the premises behind coreXY is no moving motors... Dunno about the hollow Z motors, sounds like something you want to try rather than being practical.by andornot - CoreXY Machines
Quotedc42 My limited experience of using leadscrews suggests that it is very hard to eliminate wobble. So my choice would be to use two vertical linear guides or possibly round rods to define the horizontal position of the bed, one at the mid point of the left and right sides. Then one end of each leadscrew can be left unconstrained. However, from your drawing, you appear to have the leadscrewsby andornot - CoreXY Machines
Quotethe_digital_dentist Mounting the motors on the bed plate means their cables have to move. Thanks for the feedback Yes the motors will move and the cable carried in an energy chain by igus, received some samples last week, they are perfect for keeping the cables tidy. Quotethe_digital_dentist Mounting the linear guides and A and B motors on top of the frame members means you won't be able toby andornot - CoreXY Machines
Quoteo_lampe Interesting concept to put the z-lift in the hotend. Also using non-captive leadscrew steppers is new to me. One thing I'd reconsider is the placement of the linear rails. I'd try to put them below the top-members to reduce the gap between bed and X-gantry. Especially when using larger extrusion cross section. I'd also rotate the X-linear rail 90°. A vertical mounting plate makes itby andornot - CoreXY Machines
Quoteprot0typ1cal I like it I'd put the steppers in the front and let the belts cross (or stack?) in the back over the centered Z screw. Though keeping em in back helps tidy up wire routing. Looking at your pic, If all 3 Z screws are anchored, makes me wonder if you need the Z rods at all? Thanks for your feed back The 3 z screws are located in bearings top and bottom (not clear on the picturby andornot - CoreXY Machines
I am developing a corexy having spent years working on delta printers its time for a change. This is work in progress as i develop the design in cad and publish its progress. Specifications: - build size 350x 350 x350 - heated bed with interchangeable build plates - auto levelling using 3 z axis and probably a mechanical break z probe - initially 1 hotend, direct drive then develop 2 hotends anby andornot - CoreXY Machines
My build plate is stuck down with 3m double side tape. If you only print on glass then this thread does not apply, although in the future you may want a PEI or our own build plate.by andornot - General
My webside currently sells a range of different build plates in a small range of sizes 6, 8, 12 and 17 inch square for AndOrNot build plate, PEI and Lokbuild. I am trying to determine what people want in build plate sizes as there maybe cost savings for the end user if i say offer 15 inch square rather than having to pay for a 17 inch build plate. The size changes for Lokbuild are out of my conby andornot - General
I sell 468MP sheets if require any on my website.by andornot - General
I thinking of stocking 17 inch square PEI bed material with 3M 468MP adhesive already applied to one side, would anybody be interested in this product? Price would be around the £27 mark, but i will probably give a discount code on its launch.by andornot - General
I am looking at launching a new PEI build plate, 0.5mm thick up to 1200mm wide and any length. I will be also offering 6", 8",12",17" square beds as well. Would anybody be interested in build plates of this nature.by andornot - For Sale
Jinx thanks for trying out the prints underneath andornot's bed material, they look a promising technique to customise your 3d printer. I am looking into sourcing a high temperature print material, i will keep you posted. Regards Andrewby andornot - General
Kengineer Garolite is like a turnol material, I would remove it and add a build plate material like PEI or other build plate. I sell a range of build plate materials if this is of help through www.andornot.co.uk and have just launched my own material, its competitively priced and more robust. There is thread below about the material: Thread of andornot build plateby andornot - General
6 inch and 17 inch build plates will be in stock next week, they are available for backorder now.by andornot - General
I am currently working an a web interface for the smoothie board using raspberry pi3 and touch screen through its ethernet port, along with designing a corexy printer. I want to integrate the raspberry pi touch with the corexy, including calibration routines etc.by andornot - General
Maybe we need to think of a way to print fdm with resins, then we get the best of both systems. Andrewby andornot - General
I am interested in this material as i have a range of bed materials i sell through my website, where would i purchase it from to give it a go. I am currently testing other materials, my aim is to drive down the prices of add-ons and consumables and make it more affordable for everybody.by andornot - General
Nice idea, but is the maximum temperature the tape can handle? QuoteRoberts_Clif All build plates surfaces are much too expensive, and over glamorized. I purchased a similar surface for my 3D Printers and it is difficult to get anything to stick to it. I cover my expensive build surface with Vinyl Transfer Paper Tape, similar to blue painters tape comes in 300yard rolls. With widths that will coby andornot - General
To clean the bed do not use acetone, alcohol based fluid are ok to use. I need to write a blog on website on its use, if you have any questions just ask. Andrewby andornot - General
I am offering an Introductory offer on my bed material for the Reprap community of 20% off, discount code: "20reprap" Links below to the bed plates 12" AndOrNot Build Plate 8" AndOrNot Build Plateby andornot - General
Jinx thanks for the review of the printer build plate.by andornot - General
@ jinx, maybe you could print your own personalised surface with paper or another material and stick it to the back of my print bed material and then stick a 3m double sided adhesive to this, also available from my website in 8 inch and 12 inch. Just an idea, i will give a try and post the outcome. Andrewby andornot - General
I have send a sample David to try with his IR sensor, hopefully soon he will give you all feedback. @rgn01 it does include an adhesive like Lokbuild and Printbite.by andornot - General
The link to my beds is: 12" square AndOrNot build plate 8" square AndOrNot build plate Regards Andrewby andornot - General