Quotesomeoneonly The shop I bought from left out 2 drivers so I will need to buy some more. Do you think that I could run DRV8825 drivers for the extruders and A4988 drivers for the xyz axis(to save cost) ? Or should I just replace all drivers by A4988 drivers ? I don't see why not. You'll be much happier with the A4988 drivers runing XYZ, and the DRV8825 will have less issues with the extrudeby Paul Wanamaker - General
According to this from the EPA "The odor threshold for styrene is 0.32 parts per million (ppm)."by Paul Wanamaker - General
The study indicates that Styrene is the primary product from ABS. This link has all the info needed about styrene exposure, see page 2 on the right. This indicates exposure should be less than between 0.2ppm and 5ppm depending on duration. Health Effects The most sensitive target of toxicity is the nervous system. Effects observed in workers include decreased color discrimination, vestibuby Paul Wanamaker - General
I haven't used a Rumba in years (upgraded to a Smoothie), but perhaps this page will help: Just in case you have a Delta: it's not recommended to use 1/32 microstepping with Delta printers (causes 2x the stepping load on the microcontroller), or graphical display. Also, depending on your motors and voltage you may have some issues with missed microsteps with the DRV8825 drivers. This shows upby Paul Wanamaker - General
This is a tough one. I've been thinking about it, and I think it's a bug also, however: - Have you made sure you have the Marlin specific library settings in the Arduino IDE, and the IDE version they are using? - Have you tried it with the PanelOne commented out? Perhaps the code for that display has a delay in it. - When I used Marlin first, and then Repetier years ago I found that Repetieby Paul Wanamaker - Slic3r
Matt, Thanks for your reply. There are many pages that will never ever be found by people that need them, as they either do not know the secret phrase (they may be nubes after all), or assume the page doesn't exist if it isn't linked. So I think it is important that pages be find-able by browsing the Wiki structure. I agree with you on #2, let's not go there. As for the search - ah, you usedby Paul Wanamaker - Administration, Announcements, Policy
I agree that the Autospeed/max voumentric speed can help keep the extrusion rate from going over the max you set for your nozzle. It does do that by slowing down the wide or fast extrusions. Note that there are a few issues you can run into with autospeed: - Not all of the speeds can be set to 0, the lower set of items (Support material and below) do not indicate that you can set them to 0, anby Paul Wanamaker - Printing
This is what I found in the gcode: You can see from the graph on the bottom, there are large pressure changes in the nozzle. Here is the annotated gcode for that area: G1 X97.969 Y114.225 E263.16113 F3000.000 ; 0.294mm infill 8.848 mm3/s G1 X96.950 Y114.225 E263.23865 ; 1.019mm infill 8.838 mm3/s G1 X96.950 Y113.688 E263.27949 ; 0.537mm infill 8.835 mm3/s G1 X97.893by Paul Wanamaker - Printing
Great! Please let us know how it goes with Cura if you have a chance.by Paul Wanamaker - Printing
I took a portion of that image, cropped and enhanced it: So here are my thoughts: You could try rotating the part by 45 degrees and reprint. This will help determine if it is related to bed movement or extrusion. If it is due to bed movement, then with the results should be different. If it is due to extrusion then there should be no change. Without the Gcode it is not possible to determine mby Paul Wanamaker - Printing
Sounds good!by Paul Wanamaker - Delta Machines
Robse, Sorry didn't see you had posted the update. Now are you talking about the bulgy stuff showing on the top photo of the black rectangle, on the left side? If that is the case then I think what is happening is due to the motion of the heavy Y axis. There are a lot of things actually that can cause it. Take a look at each of items 3-11 on the Shifted Layers page I compiled:by Paul Wanamaker - Printing
PRZ, Yes, you could even say "driver chip" and "driver board". Good, I didn't see the link. No apologies necessary, thank you for your work! Note that I certainly do not want to complicate the article. A bit of background on why I mentioned the three items above: Not knowing better when I built my delta - I had all those issues. I used .9 degree motors and 17 tooth pulleys, and this seriousby Paul Wanamaker - Delta Machines
QuotePRZ Paul: done, but it's a wiki, why not doing it yourself ? Yes of course... I had just linked the other page you added to Tutorials, but when I went to set this one to Reference I didn't have the Edit option. (???) So I thought the page was being edited.. But turns out the wiki had just auto logged me out after 180 days...by Paul Wanamaker - Delta Machines
Very good. Please add this to the Reference section by using this tag at the bottom: []by Paul Wanamaker - Delta Machines
Hi Prz, It's a good article! I added a link to an article about the DRV8825 problem. I added it to the Tutorials category. I made a few very minor grammar fixes. I'd like to discuss a few of additional things that are relevant to this discussion: - The relationship between the choice of pulleys and choice of stepper motor. For instance a worst case scenario is: a .9 degree motor and pulleysby Paul Wanamaker - Delta Machines
He mentioned in the video that the extruder flow rate was tested off the machine - it looks like he is still doing unit testing. It is not apparent that he has printed anything at all yet, so for everything he has done it's not possible to judge yet... Hopefully (now that he has finished his degree) he will still have the motivation and energy to complete the project. IMHO it would have been bby Paul Wanamaker - General
Cura had a setting for bridging in an old version (v13 I think), however the developers have decided that setting is not important. Perhaps it's not important for the printer type the developer used (typical problem). So you have no settings for bridging at all... That's too bad as bridge flow ratio is crucial. You can try changing the speed settings one at a time to see which one is used (prby Paul Wanamaker - Printing
Hi uski, I'll start it off... We'll need more info, specifically: - what slicer - what printing speed for bridging - what bridge flow ratio - what speeds and extrusion widths for perimeters and infill - you may possibly may need a link to the gcode file (contains more settings that were used) So without specifics: Usually the issue is related to printing too fast while not extruding enough.by Paul Wanamaker - Printing
Thanks much. Should be no problem then. Bed is cast tooling plate with mirror on top.by Paul Wanamaker - Delta Machines
That's a wonderful calculator. I've sent you an email about what I plan to do with it for my own printer. Does the distance between the probe and nozzle have much affect on the calculation? Thanksby Paul Wanamaker - Delta Machines
Great! Let me know here if you have any problems with the guide. Thanks!by Paul Wanamaker - Printing
I've published the guide Retraction Tuning With Slic3r on the Tutorials --> Slic3r Tutorials Wiki page. It's a Wiki, so you can add to it and fix/enhance it too. I've added some videos to the Slic3r Tutorials page that go over the enhanced features of Slic3r very well. There are a couple of the newest features that are not covered - max volumetric speed and the preview options. If you haveby Paul Wanamaker - Slic3r
Koby, I've gone ahead and published the guide Retraction Tuning With Slic3r on the Tutorials --> Slic3r Tutorials Wiki page. I'm quite familiar with ways of doing all this by inserting gcode, but not for all of this for all firmware. As always, if I've made an error, please let me know. Hope that helps!by Paul Wanamaker - Printing
It looks like the first layer over the infill did not cover, and then the layers over that broke as well. Note that the first layer over infill is Bridging! If the feed rate is too fast, or the bridge flow ratio is too low then the extruded filament will stretch and break when it crosses one of the sparse infill lines. So increase your bridge flow ratio (with Expert settings on, Advanced tab,by Paul Wanamaker - Printing
You're welcome. Glad you got it going! Yes, that's a very good article. I've confirmed that with my own testing. That is an interesting result - that may be indicating heat creep is the issue - perhaps too slow extrusion and the filament has time to get soft before it hits the hot zone. Will a fan fit between the rails? BTW, I've just added a Slic3r Tutorials page to the Wiki that may intby Paul Wanamaker - General Mendel Topics
I watched it through. It's a big feat, I hope it works. I hope he publishes the test results on all the things he re-invented, including his fast code libraries. That will be progress one way or another. Other than that, he's learned a lot, good for him!by Paul Wanamaker - General
Their drivers are around $41. I've seen several models. So a bit under $100 for a new motor and controller. That's a little bit of ouch, but it may well be worth it if it's quieter and more powerful. I found a good article about Brushless DC Motor Control on Digikey. Interesting how the hall sensors are used. Perhaps that could make the fan run quieter or more efficiently? Looks likby Paul Wanamaker - General
I have created a new Wiki page: Slic3r Tutorials This contains links to Slic3r Tutorials, Documentation, and Videos. If you know of an excellent Slic3r tutorial or video that is not linked there, then please update that page or post a link here and I'll update it. Thanks! The new page is linked from the Wiki Reference - Tutorials section, and from the Slic3r page. Share and enjoy.by Paul Wanamaker - Slic3r
There are a couple of things you can do for this. If you are having problems with excess vibration you can change the acceleration in firmware, or even easier in Slic3r, with expert settings on, under Print settings, Speed, Acceleration control. For example, for my Delta printer I have default acceleration set to 2200 (also my firmware's default), but use reduced acceleration of 1500 for perimeby Paul Wanamaker - Slic3r