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http://reprap.org/wiki/CoreXY
Re: "Randon" fat lines on outside, can't find any example on the issue - 6 weeks ago
I should add that this works for me - your results may vary!by David J - Printing
Re: "Randon" fat lines on outside, can't find any example on the issue - 6 weeks ago
You could measure the number of threads in a set length of your Z leadscrew - mine is 10 tpi - then convert the measurements to metric and work from there. So 10 turns per inch, or 25.4mm One successful fraction of this (for me) is to have a layer height of 0.25mm. By using this I get a far smoother finish than by using 0.2 or 0.3. I suppose I could make it 0.252mm, or even 0.126mm, but I havby David J - Printing
Re: "Randon" fat lines on outside, can't find any example on the issue - 6 weeks ago
Have you tried setting your layer height to an exact fraction of the pitch of the Z axis feed-screw? It works for me...by David J - Printing
Re: Wire gauge and a near serious accident - 2 months ago
I think that you're about 2 years too late with this information...by David J - Safety & Best Practices
Re: Cable management for the X-Y axis - 2 months ago
That's roughly what I had previously, although my chain was home-made and the PLA got fragile after a year or so (as it will tend to!). The main difference with yours is the loop around the top of the carriage: mine started in the back-right corner, and the other end attached to the left of the carriage - this meant that the severe bend when at the extreme right strained the chain somewhat. Takby David J - CoreXY Machines
Cable management for the X-Y axis - 2 months ago
This is a minor annoyance - but it's really getting on my nerves, and also my wife's! My CoreXY printer has a bundle of wires that go to the X/Y carriage - it's inevitable, they're required. Originally I had a cable chain to keep them under control, but the chain's minimum radius meant that when the carriage was at X-max and Y-max the chain had to close right up and also hang off the right-handby David J - CoreXY Machines
Re: E3D V6 clone quality ? - 3 months ago
Here's my viewpoint, from my many years in quality assurance: if a particular product has mostly good reviews, with the occasional bad one, there's a fair chance that as a whole the product is a good one and the manufacturer has a good testing system. If there reviews are an even mix of good and bad (as often found with Chinese E3D clones such as these) then it means that their quality assuranceby David J - General
Re: Puzzled by my results with M600 - some help would be appreciated - 3 months ago
Interesting - but it doesn't address my problem - I am trying to get the Marlin M600 command to work properly. I am not interested in filament changes using other machines, software or slicers. It's simply that Marlin has the M600 command, and it isn't working for me. I'm trying to find out why.by David J - Firmware - Marlin
Re: Puzzled by my results with M600 - some help would be appreciated - 3 months ago
QuoteRoberts_Clif In cura I use Park at Z with Prusaslicer a pause can be inserted from the Preview window or here Park isn't really the problem - it's the filament unload/reload that's bugging me. Also, I don't use prusaslicer...by David J - Firmware - Marlin
Puzzled by my results with M600 - some help would be appreciated - 3 months ago
I have a Anycubic Kossel Linear Plus, with a Trigorilla board running Marlin 1.1.9 - this has been running nicely. Now I have been wanting to use M600 (filament change), and I've *almost* got it working properly. Here's what I've got in the marlin code: Extract from configuration_adv.h: #define ADVANCED_PAUSE_FEATURE #if ENABLED(ADVANCED_PAUSE_FEATURE) #define PAUSE_PARK_RETRACT_FEEDRATEby David J - Firmware - Marlin
Screwed up my Anycubic Kossel's gcode - [ REQUEST CANCELLED] - 4 months ago
OK - I've painted myself into a corner. I've been fiddling with the gcode associated with my Anycubic Kossel Linear Plus delta to try and get rid of a persistently annoying error, and I've managed to screw it all up. No backups of the old code, of course... All I'd like is for someone to show me their gcode for start, finish, pause, resume, and kill. I can then compare it with what I've got aby David J - Delta Machines
Re: Serial port menu grayed out in arduino - 4 months ago
I don't know the Mac OS very well - but on my Linux system that often indicates that the user doesn't have the correct access rights for the comms port.by David J - Reprappers
Re: Idea for a fire safety system. - 4 months ago
Sorry, I was being a bit flippant. I never do that sort of printing... but I do understand why people would, and why they might to leave them unattended. I would be unhappy to run mine inside the house if I needed to leave it to its own devices, and would probably leave it in the garage. A fire/smoke sensor over the printer would seem to be a minimum requirement.by David J - Safety & Best Practices
Re: Idea for a fire safety system. - 4 months ago
I take a basic approach - I only run my printer(s) when I am nearby, usually when I'm in the same room and never more than 1 room away.by David J - Safety & Best Practices
Re: Thingiverse taking it's last breath? - 6 months ago
Has anyone else started to get dodgy notifications from Thingiverse in the past week or so? I have seen comments on my designs along the lines of "I am very lonely and want to meet you..." or similar (many worse). They now seem to be wide open to rogue, malicious postings. I have had to turn off all email notifications from this site. I have gone from "It's an OK site", to "It's not working veby David J - General
Re: print quality awfull out of the blue 
- 6 months ago
This may be a silly suggestion - feel free to ignore it - but I have been caught out in the past with a delta, when one or two of the toothed pulley fastening screws worked loose on the motor shafts. Not enough to fall off or stop rotating, but enough to allow a few degrees of rotation, depending on where the flat of the shaft was in relation to the pull on the drive belt. This was a headache tby David J - Printing
slic3r not running in Linux Mint 'Mate' with nouveau driver - 7 months ago
The back story is that I'm having significant issues with the nvidia drivers on my system, so I have temporarily swapped to the open-source nouveau windows drivers until I can resolve them. Everything is working well apart from slic3r, which refuses to run when I call it directly. When trying to start from the windows manager I get no response, so I called it from a terminal to see if I could sby David J - Slic3r
Re: Thingiverse taking it's last breath? - 7 months ago
I wonder whether Makerbot realise that savvy people will take this company's lack of commitment to the website into account when considering the purchase of a new 3d printer. (probably not)by David J - General
Re: Thingiverse taking it's last breath? - 7 months ago
I see that Thingiverse now has an ongoing problem with "search" - it's been broken for a couple of days... the site is even less usable now...by David J - General
Re: Failed to connect - 7 months ago
It's always the last one, no matter what you're investigating...by David J - Printing
Re: Thingiverse taking it's last breath? - 8 months ago
Ohmarinus, you are right in so many ways - I think that's why so many people (including myself) are frustrated by the recent changes. They took something that appeared to be working (I can't speak for behind the scenes) and, basically, they made it unusable. I do wonder if there's an element of pride and/or stubbornness in continuing with the new site layout - "we put a lot of effort into it anby David J - General
Re: Improving the CoreXY mechanism on my G&C printer - 8 months ago
Thanks for that good info - gives me a few clues. Your links are good, except buying stuff from the USA means that I pay almost as much for shipping as for the items themselves! (I'm in the UK). That's supposing that the supplier will even ship to the UK. I can try those searches within Europe though, to see what's around. I've found the UK's HiWin distributor, but no prices showing on theirby David J - CoreXY Machines
Improving the CoreXY mechanism on my G&C printer - 8 months ago
I have a G&C CoreXY printer (Thingiverse) that is working acceptably well, apart from a small number of niggles. If I pay attention to slicing details I can produce a decent print in PLA, PLA+ and ABS. The frame is quite solid, and I am content with the bed and the Z mechanism for the time being. The biggest hurdle is that its CoreXY mechanism is a complete PITA to maintain. I have just haby David J - CoreXY Machines
Re: Thingiverse taking it's last breath? - 8 months ago
It's not in a good state of health - it's a crying shame as the old website just worked. It did its job, was nicely laid out, and showed a range of featured designs and new items on the front page. I recently tried to load a customizable design but the end result was just horrible and unusable. It was really simple too, with few variables. I am now getting far better service on Cults3d, whby David J - General
Re: Belt tightness? - 9 months ago
This design was a 3d-printed version of an all-metal design by someone called zelogik, and it does work (mostly). Though it is worth noting that the designer of my printer released a mostly metal version a year or so later! Most parts are extremely robust, but the flaw in the design of the part in question is that it isn't fully located in one direction, although it is in all the others. Now tby David J - CoreXY Machines
Belt tightness? - 9 months ago
I have a CoreXY printer that's a few years old (this design: ). It has worked very well, but lately I'd noticed that the carriage was getting stiff to move around, especially in the Y axis, and print quality was deteriorating. So I decided to investigate. I found that the rods that run on each side for the Y axis were no longer parallel - I believe that this was due to the belt tension pulling tby David J - CoreXY Machines
Re: A question about safety goggles - 10 months ago
Thanks. That's what I suspected, but there's no real substitute for knowledge and experience! Now off to spend some money... Regards, Davidby David J - Laser Cutter Working Group
Re: A question about safety goggles - 10 months ago
Well, I'm struggling to find a UK supplier - either they're 'industrial grade' and won't talk to individuals, or they just won't communicate... The places that are easy to deal with are all selling Chinese safety specs... and I'm wary. So it looks like I'll be ordering a pair from the US of A to get a certified standard - probably the 'Eagle Pair' slip-over type. Unfortunately the postage is haby David J - Laser Cutter Working Group
Re: A question about safety goggles - 10 months ago
That's what I thought! I wasn't going to buy the Banggood green ones anyway - I value my eyes. I'm now trying to find a UK supplier that shows a decent specification for their products, with a not-too-silly price.by David J - Laser Cutter Working Group
A question about safety goggles - 10 months ago
I have just placed an order with BangGood for a 2500mW laser module, with a beam of 445nm. While this makes its way slowly from China (3 or 4 weeks, apparently) I now have time to think about safety goggles. But I'm puzzled - the safety goggles usually sold with blue lasers are green - shouldn't they be an opposite colour to blue, such as dark yellow, or red? I would have thought that greenby David J - Laser Cutter Working Group