I am happy with the squareness in all axis.by RodF - CoreXY Machines
Yes that would work. However it looks worse than it is as I am holding it at an oblique angle to the light. Also I have yet to install the ACP sheet on the back which will stiffen it considerably. Still got the enclosure and filament reel to do.by RodF - CoreXY Machines
I produced a test part to check accuracy. It was designed as X100 Y100 Z101.5 It printed at X99.04 Y99.3 Z101.37 I expect the discrepancy is shrinkage rather than step/mm issue, however I might adjust to allow for it. I am getting a bit of banding on the Y axis corresponding to the 4mm Z scew pitch. That would make sense as the bed is less stiff in the X axis. (if that makes sense).by RodF - CoreXY Machines
I've been doing more testing. I really like the IR probe, it produces a height map of the bed and then uses it to compensate for inaccuracies. I've been checking its accuracy with the dial guage and it seems pretty good. Repeatably seems good too. Here is an example of a 50mm interval height map it produces, it also saves a numerical file.by RodF - CoreXY Machines
I have been working through the commissioning process and have got to the printing stage. I haven't printed PLA for quite a while and had to resort to tape to get it to stick. I hadn't followed the instructions and heat soaked the Printbite for a couple of hours so I am doing that at the moment. The little flat extruder motor seems capable of handling a high extrusion rate. Duetwifi runs veryby RodF - CoreXY Machines
Had an issue with the extruder heater faulting. dc42 sorted it out. It was induction in the wiring harness. I bypassed the harness to test it. That allowed me to tune the extruder. I will probably rewire with twisted multi core cable.by RodF - CoreXY Machines
Got the wiring finished. IR Zprobe seems to be working but I still need to sort out the firmware for it.by RodF - CoreXY Machines
QuoteMikk36 Why are you measuring stepper driver current in capacity? My mistake I meant amps.by RodF - CoreXY Machines
Stuck the heater and Print Bite onto the build plate and installed it. The plate has a fixed point at the rear and 2 sprung adjustable points near the front. I have the XY carriage moving correctly and homing. The XY stepper power settings are still on .5 amp and the Z is .8 amp. Working fine at these power settings so it should be pretty solid at 1.9 amps.by RodF - CoreXY Machines
Wired the X and Y motors and the end stops. Powered it up and all 3 axis are working. I'm trying out Fusion 360 and made my first part a pad for the Y end stop.by RodF - CoreXY Machines
Unfortunately work is getting in the way of my project at the moment. However a break is coming up so I can give it the final push. I am hoping the 3 screw Z system will tend to cancel out any wobble and that the 2 linear rails will also hold it steady. Yes DD Feeding the filament from above is the way I am going to go. Perhaps not the most attractive setup but simple and effective.by RodF - CoreXY Machines
Thanks for the input zelogik. Your work was a major inspiration for this project. I agree that the single cable chain is a good way to go however I will carry on with what I have until I do an upgrade or major service. I don't want to run the filament through the chain as I am wanting to use the brittle carbon filled filament.by RodF - CoreXY Machines
That's the X axis and end stop cabling installed. Next up is the Xand Y stepper wiring. I've also got a heap of crimping to do. Not a great shot but you can see the connectors on the X axis. I'm going to use 4 wires on the heater and 4 wires on the PT100 temp sensor.by RodF - CoreXY Machines
Getting the wiring in is a bit of a mission. Nice fit in the cable chain though. Got colour matched cable protector.by RodF - CoreXY Machines
I think I have all the cable chain I need, it was the clean up of each part that was boring. I am not the neatest person, so I took others advice and have tried to get the cabling sorted out as part of the build. Moved the power switch to the other side so I don't need to reach past the plug to switch the machine on.by RodF - CoreXY Machines
Got the Z axis cable chain done. Now to wire it up. I am leaving the final bed mounting till I have the z axis moving so I can get an accurate position with the extruder.by RodF - CoreXY Machines
Hmm nice cable solution. I had seen it before but didn't really consider it properly. It is never too late to change so I will have a think about it.by RodF - CoreXY Machines
Tuned up the Y axis cable chain and end mounts. Z axis chain is next on the list.by RodF - CoreXY Machines
The Y cable chain assembly is still work in progress. I seem to make a lot of the parts more than once. I was interested in DD's machine weight of 50 KG so I weighed mine. It is 16.4Kg at the moment and I expect it to come out about 20Kg. Mine is only 2020 and is still not that torsionally stiff yet due to the long uprights. However the 4mm ACP on the back and 2mm Polycarbonate on the sides shoby RodF - CoreXY Machines
QuoteCalvinx66 QuoteRodF Hard to say if it has retained flatness but I am able to adjust it if necessary. I have a question about that, why the attempt at such flatness and accuracy when it was always going to moved, wouldn't it have been better to have built it on the normal work surface and do all final leveling once the unit it in its final location ? Good question! I want to get it rightby RodF - CoreXY Machines
I've been slowed down with a new job and house renovation. However the renovation is over and the job is settling down so back on the Core XYNZ. Wired in the mains relay for the bed. Mounted the XY into the Z frame. Hard to say if it has retained flatness but I am able to adjust it if necessary.by RodF - CoreXY Machines
Made some adjustments to the printed parts to retain the circuit board. Moved their position for clearance at max end points. Added a cable chain support.by RodF - CoreXY Machines
Here is the wiring concept for the X axis. It still needs a few tweaks but I'm nearly ready to install the XY into the Z axis frame.by RodF - CoreXY Machines
QuoteFA-MAS Whoa that's a lot of chain. If you have any extra wanna send em my way I think I still need more Z axis is 400mm.by RodF - CoreXY Machines
Have been working on the redesign of the cable routing for the X axis. Also printing more cable chain. Also waiting on cable to arrive. I'm going to use RC servo cable 22G and 26G.by RodF - CoreXY Machines
Sure. There is a link back there somewhere to the fan source. I got 10 of them. Edit. updated the files.by RodF - CoreXY Machines
Here's how it looks installed. It's a bit light weight and could do with a few tweaks, so I will do it again.by RodF - CoreXY Machines
Here is the board mount. I have incorporated ducting to cool the drivers from underneath.by RodF - CoreXY Machines