QuoteDanLI'm finding that I like to tweak the printer as much as actually printing. Welcome to my world.by gtj - Extruded Aluminum Frames
Back to the alignment question. I just did this last night... I start by making sure the frame is as square as possible. Then I use jigs to make sure that the left stationary motion rail is co-linear with the left frame member. Then I use precisely trimmed carbon fiber rods to make sure that the right stationary rail is parallel to the left rail (even if the frame is a bit off). Finally Iby gtj - CoreXY Machines
Quotedlc60 Basically then, it is a Cartesian version of a Delta printer because you don't have to move the X stepper around, which should make it faster, as long as your belts are "stiff" enough to avoid flexing or vibrating too much? And they look cool. I wouldn't compare to Delta. It's a totally different animal. But yeah, you're not moving any motors around except maybe an extruder motoby gtj - CoreXY Machines
Quotepiper3d Using @the_digital_dentist picture: A,B,G,H should be aligned to make square prints rest may not be parallel. Those belt parts each have a pair of idlers/pulleys. (plus F,D,E,C but they have one idler) @the_digital_dentist uses stacked pulleys so P1..P4 are actually 2 pulleys on the same shaft. That makes them easier to align but makes shaft assembly a little more complicated becby gtj - CoreXY Machines
Quotethe_digital_dentist You have to align the drive and idler pulley to keep the belt parallel to the guide rails in any belt driven machine. Yeah but in my Cartesian, there were 4 sets of 2 and only the 2 in each set had to be aligned together... the drive gear and the far end idler. Now there are 2 sets of 4 with all 4 in each set having to be in alignment and the 2 in the middle (on eachby gtj - CoreXY Machines
As someone who just converted their 500x500x500 Cartesian XY machine to CoreXY I can offer the following... The design was developed into a usable form by Ilan Moyer at MIT so it can't be all bad Lots of folks have experience with it. Yes the belt length and angles were a little weird but I got over it after seeing it in action. I have almost 5 meters of 9mm belt but it works fine (using genuiby gtj - CoreXY Machines
If you use 3 Z leadscrews/motors instead of 2 (1 in the center back and 1 in each front corner) and you use a probe on the hotend, you can take advantage of auto bed levelling.by gtj - General
Quoteimqqmi I usually put things where I'd expect to find it if I'm looking for it. This sounds obvious, but when you think about it, how many times did you put things where you'd never expect to find it? It's usually when you are doing something vaguely related, got distracted and put things where you never put them. So my strategy is to try to be concious what I'm doing even in the thick of thiby gtj - General
I can't believe it's been a year and I'm not claiming complete victory yet but IT'S WORKING! The Flex3Drive in my mount... The back panel... Extruder motor mounted horizontally. Still have to neaten up the umbilical. The part cooling fan should be to the left of the heat sink but I busted the mount when I was playing with XY homing and limits. I still have to do some tweakby gtj - Extruded Aluminum Frames
YAY! I got the Flex3Drive and Printbite yesterday as well as dc42's IR sensor to replace the finicky BLTouch. I also think I got my EMI issues sorted. I'm replacing the 18ga wires with 22ga shielded twisted pair. Dare I be optimistic and say "I should be printing before the end of this weekend." ?by gtj - Extruded Aluminum Frames
Well, I'm so disappointed in the Flex3Drive folks. It's been 2 months since I placed my order and it's still "processing". I did get an email from Jason 2 weeks ago saying he was working the order and was trying to ship by the end of that week. Haven't heard anything since. I sent an email last night asking to cancel the order if they couldn't ship today or Monday but who know if that will eby gtj - Extruded Aluminum Frames
Quoteo_lampe I wonder, if that's related to the ribbon cable connector between Duet and DueX? Where did you probe the endstop signal? Right at the Duex5 endstop connector. I also examined the signal pin on the end of the cable with it disconnected. In this case, the board was supplying only 3.3v and ground. Without anything to terminate the signal, the noise was horrific. Adding the filter cby gtj - Extruded Aluminum Frames
Quotedc42 Odd, the first one says the last reset was a software one commanded by the user. This could mean that M999 was sent, or the Emergency Stop button in DWC was pressed, or it restarted at the end of doing a firmware upgrade. The second reset shows power up as expected. The comment about M999 got me thinking... I think this is an endstop issue on the Duex5 and not limited to 2.0x. I haveby gtj - Extruded Aluminum Frames
Quotedc42 Odd, the first one says the last reset was a software one commanded by the user. This could mean that M999 was sent, or the Emergency Stop button in DWC was pressed, or it restarted at the end of doing a firmware upgrade. The second reset shows power up as expected. The first one was with everything idle for at least 30 minutes. I was watching Netflix at the time and saw the LEDs goby gtj - Extruded Aluminum Frames
Quotegtj Quotedc42 Quotegtj BTW, 2.0 isn't stable for me at all. I get random restarts even with everything at idle. No errors, nothing. Back at 1.21 everything's stable. Can you try 2 01beta? It fixes a possible contention between two tasks. If it doesn't help, please run M122 after one of those restarts and post the software reset data and the stack trace. Yeah, that's what I was running,by gtj - Extruded Aluminum Frames
OK, I'm back at 2.01b1 and I direct cabled the power between the 2 boards. We'll see how it goes. I'm also getting closer on the gantry twist...by gtj - Extruded Aluminum Frames
Quotedc42 Quotegtj BTW, 2.0 isn't stable for me at all. I get random restarts even with everything at idle. No errors, nothing. Back at 1.21 everything's stable. Can you try 2 01beta? It fixes a possible contention between two tasks. If it doesn't help, please run M122 after one of those restarts and post the software reset data and the stack trace. Yeah, that's what I was running, sorry. Iby gtj - Extruded Aluminum Frames
Quotedc42 It's not just the resistance, it's the inductance too. Well, it's easy enough to change. BTW, 2.0 isn't stable for me at all. I get random restarts even with everything at idle. No errors, nothing. Back at 1.21 everything's stable.by gtj - Extruded Aluminum Frames
Quotewhosrdaddy Sorry, above comment may seem rude! Forgot to say, awesome cabling job! /Kris Heh, no worries! For flexibility I ran the power cabling for both boards back to the power supply but it is 16ga wire and I did check the resistance between the negative terminals on the 2 boards with the ribbon cable disconnected. It was below the measurement threshold of my meter. I also have takeby gtj - Extruded Aluminum Frames
Well, I haven't posted in a bit but that doesn't mean I haven't been busy... Finalized the Z axis lower ends. This arrangement is much easier to adjust the alignment and mount the Z-high endstops. And doesn't this look nice? 6mm MIC-6 build plate. I moved to the Delrin Z nuts and they are super smooth and I mounted the plate the same way I did the glass, with Nylon bearing races. Tby gtj - Extruded Aluminum Frames
Yay on two counts... My MIC-6 plate should be ready tomorrow. I heard from Mutly3D and he's assembling my Flex3Drive order now. I've also decided to switch from 6mm wide belts to 9mm wide belts. I just have to re-print the carbon fiber XY rail sliders. I'm also re-arranging the Y leadscrews and verttical rails slightly to align them better. More pics in the next few days.by gtj - Extruded Aluminum Frames
Quoteo_lampe QuoteI guess the glass IS a little wavey If you want to find out if it's wavey or binding mechanics, you could rotate the bed. ( Maybe not, because you glued the bedholder to the glass ) Yeah I thought of that then thought "Duh". Anyway I've got the MIC-6 coming in next week. Quotedc42 It looks like you have a slight twist in your gantry too, unless it's the glass again. Quite pby gtj - Extruded Aluminum Frames
Made lots of progress... I found a local place that'll give me a 20" x 20" x 1/4" MIC-6 plate for $176. Should be ready mid next week. I made a design change to the bottom end of the Z lead screws. Having a bearing block right above the motor was introducing wobble in the screw so I got rid of it. I also changed out the couplers because the rigid ones weren't grabbing the lead screw evenly whby gtj - Extruded Aluminum Frames
Quotethe_digital_dentist You can print PLA on unheated blue painter's tape for testing without the bed heater. True. I did my Flir analysis of the 1/4" tempered glass over lunch. The results were so dismal I'm not even going to show them. I managed to get a response on an aluminum plate just a few minutes ago but he quoted me $460 for a mic 6 plate which is not in my budget. He's explorinby gtj - Extruded Aluminum Frames
Quotethe_digital_dentist It looks pretty good. When will it be printing? Thanks. I had everything hooked up to the Duet2 last night (after I re-pinned 6 connectors I screwed up) and gave the XY axes a workout. I have to re-route some cables though as the ones that come down the inside corners in the back are being hit by the tool carriage. I'll have to route them on the outside. The Z axisby gtj - Extruded Aluminum Frames
Motors and idler pulleys mounted and connectorized. Here's the new bed mount. These are 11mm ball ends for RC car linkages. I printed 2 sliding races from nylon for the front 2 corners, The center back race is circular to anchor the bed. The front 2 races "point" to the center back one. Since they're at a diagonal, the bed can only move in a straight line from the center back to theby gtj - Extruded Aluminum Frames
I was thinking about this the other day for Black Beauty. How about allowing the user to configure the bounds of each heating zone, then when a file is printed scan the file to find the print bounds and only turn on the heaters needed to cover the print.by gtj - Duet
The piggybacked board is a Duex5. I'm particularly interested in if there'd be any signal problems with the ribbon cable folded between the boards. There's Kapton tape protecting the cable physically and I could easily shield it with copper foil if needed. Oh yeah... The bed mosfet on the main board will only be driving SSRs and the mosfets on the Duex5 aren't going to be used so no heat issuby gtj - Duet
Quotethe_digital_dentist Most glass doesn't expand much at the temperatures a print bed operates, so it may not be needed. OTOH, if you use glass on top of a piece of aluminum you have to think about what the aluminum is going to do. Yeah true but your mount also allows a plate of any material to tilt and follow the lead screws without putting any stress on the plate itself.by gtj - Extruded Aluminum Frames
Quotethe_digital_dentist The bed shouldn't be "floating" on the springs, and they aren't there to protect against a "head-crash". They are there to ensure that the bed is pushed firmly against the heads of the leveling screws (or the nuts, depending on how you've assembled things). The bed as shown is resting on thin felt pads both to prove for a bit of movement and to provide a thermal break bby gtj - Extruded Aluminum Frames