It is looking great Filipe. Stay with your rails.by RodF - CoreXY Machines
Not much visual progress while I adjust the XY and main frame. Mounted the power supply though.by RodF - CoreXY Machines
Added in a cross support in the base. This give additional support to the Z screws but is mainly for mounting electronics to. Have been working on the Duetwifi board and it is nearly ready to go into the printer.by RodF - CoreXY Machines
Got one of those jobs done that I had put off. The Z belt idlers and tensioner mountings. I used shanked screws with spacers into 12mm plate and lock nutted them.by RodF - CoreXY Machines
Duet Wifi arrived in New Zealand. (probably on a plane load of Brexit refugees) Also PT100 sensor and board and IR height sensor. Awesome job getting this board out Duet team.by RodF - CoreXY Machines
Hmmmm the cable chain is upside down. I think I will redesign, integrating the end stop/molex connectors/cable chain mount. 3D printer is a brilliant prototyping tool.by RodF - CoreXY Machines
I've been working on the wiring conduit. This is work in progress. Got Molex connectors, I want all electronics on the extruder plate to plug in there. Got a sheet of 2mm polycarbonate for the enclosure.by RodF - CoreXY Machines
No problem Filipe, your build is looking good. Single and dual rail are both valid and I was very impressed with Digital Dentists video demonstrating the accuracy of his single rail setup. I am liking my large (but light) extruder platform now I am getting to that part of the build. Making a Titan extruder mount. I use a woodworking bit, a bit crude and unconventional but it is quick and accuratby RodF - CoreXY Machines
Hi Filipe Please check your facts. 400mm of 9mm rail x2 =304g + 4 short 9mm blocks 64g =368g 400mm of 15mm rail = 424g + 1 long 15mm block 92g =516g My "heavy" 2 rail system is 152g lighter than your setup. Maybe the HiWin's are lighter OTOH maybe heavier. And BTW my carriages are running nice and smoothly.by RodF - CoreXY Machines
Here is a better view of the tensioning device. It would be nice if it was more compact.by RodF - CoreXY Machines
Working on the XY axis. Tensioner is working well, still need to check belt squareness. Improvised a height guage to set the idlers and motor pulleys. Continued to make cable chain. Switched the motors to upright so the cable chain mount clears them. Also changed motors to .9 degree 2.4 A.by RodF - CoreXY Machines
I have printed new tensioners and clamps to reflect slight design changes. Print Bite is working well so I've ordered another sheet for Core XYNZ.by RodF - CoreXY Machines
Finished off the old printer enclosure. It is quite utilitarian and made from stuff I had at hand. The Core XYNZ will use ACP and plastic.by RodF - CoreXY Machines
QuoteFA-MAS I only ask cause I was looking down similar mounting methods for the motors in my design and wondered if they were going to flex all over the place. I may end up either just buying these or over engineering something involving getting some welding help. Those look nice. It was worth having another look at mine, they feel pretty rigid and I am happy to use them for the time being. Iby RodF - CoreXY Machines
QuoteFA-MAS I'm wondering about your motor mounts. Are those made from square tube or L angle? How thick are they and do they flex at all?I see where you are coming from. The brackets are 3mm thick and 45mm wide 90mm for both made from L section. I was able to flex one slightly but at a much bigger moment arm. I did a diagram to help visualise it. A you can see the bending is in the Z directiby RodF - CoreXY Machines
QuoteMikk36 Also am pondering a bit on using countersunk screws on the effector platform to attach the plate to the blocks to get a flush finish. The screw spec says 1.9 mm length for the countersunk head, plate itself is 3 mm. That will work and it is a nice look. However you do loose the slight adjust-ability of oversize holes and button or cap head screws and washers. With my machine I needby RodF - CoreXY Machines
More work on the enclosure for the old printer. Short piece of teflon tube held by a cable clamp for the filament inlet. This how I will do it on the Core XYNZ if it works out. I suppose I am going to need a fan in there for circulation.by RodF - CoreXY Machines
Quotecozmicray How are short 2020 sections attached to long 2020 rails? Why not a plate that attaches to 2020 via holes and t-nuts. It would provide stiffener to joint and stable mount for motor / idler. Hi cozmicray thanks for your concerns. 2020 attaches to each other via these holes. I have these position holding nuts for the screws. The motor and idler brackets also screw to the main frby RodF - CoreXY Machines
I really need to print some parts now. The old printer is getting an enclosure for ABS printing.by RodF - CoreXY Machines
Quotecozmicray I don't understand? All these great milled brackets and Motor mounts of a piece of 2020 with 1 corner bracket? Idler pulley mounts -- a piece of 2020 with 1 corner bracket? Maybe a triangular brace on side? Weak points like these make super machined brackets ---- useless and system wobbly? Don't worry cozmicray I haven't gone soft in the head quite yet. Here is the XY unit iby RodF - CoreXY Machines
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.by RodF - CoreXY Machines
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.by RodF - CoreXY Machines
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.by RodF - CoreXY Machines
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.by RodF - CoreXY Machines
Quotedc42 That's going to be a very nice machine when it is finished! How easy or hard is titanium sheet to machine, and how expensive is it? Does it have any advantages in this application, apart for being lighter than steel but stiffer than aluminium? The Duet WiFi has started shipping - which pre-order batch are you in? I really only wanted to use the titanium so the idler mount would be theby RodF - CoreXY Machines
Made new 3mm ali idler base plates also top reinforcing plates from titanium. Got started on the ali spacers.by RodF - CoreXY Machines
Made a titanium idler base but it was too flexible. The 3mm ali was much stiffer.by RodF - CoreXY Machines
Quotehobbymods Information overload.... I based my whole design on 20T timing and idler pulleys. I made sure I had toothed on the toothed side and vice versa, but now am reading that the idlers should be at least 1.5 times the dive pulleys diameter. For me it makes sense at a glance, but I'm buggered if I can find anyone with 30T smooth and toothed idlers. I'd probably be prepared to go withby RodF - CoreXY Machines
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.by RodF - CoreXY Machines