@o_lampe OpenSCAD might be able to do it.
This link has an example file but it would require a lot of changes to simulate the Scotch Yoke.
https://www.instructables.com/Animating-with-OpenSCAD/
You can download their example at the bottom of the page.
@o_lampe See MakersMuse latest video where he converts rotary motion to linear motion to sine wave using a Scotch Yoke.
https://www.youtube.com/watch?v=wko3SWiV1DM
Not sure if it will be useful for you but might inspire some ideas.
Are you using Gates pulleys as well? It is very important to have pulleys where the hole is perfectly centered and the perfect diameter. The teeth must be an exact match to the belt tooth pattern as well.
When you place the pulley on the motor driveshaft there should be no play. That way when you tighten the set screws they will not be able to force the pulley off-center.
Best of luck,
Tony.
@Phaedrux Thanks for that info. I thought I would have to flag posts and user.
Hi,
The forum is getting spammed big time this evening. Offering to sell everything from CBD to counterfeit money.
It is a bit tedious to flag so many posts using the existing reporting method. I know, I know, it's pretty easy as it is but I found it annoying this evening.
Maybe the ability to right click in the post subject listing and report without having to open the message, go to the bottom, then select the option to report.
Just a suggestion.
Thanks,
Tony.
P.S.
Also being able to report user and post at the same time as spam would be very helpful.
Hi,
Printenstein III used to be my Ender 5 Pro. Over the years it has changed a bit with the addition of Duet2Wifi, E3D motors, Dual Y, Dual Z, Bondtech LGX Lite Pro Revo 6 extruder.
I had some fun with it this week.
The Lapworth Museum of Geology put a very high resolution scan of a Megalodon tooth on Scan The World a few years ago.
It can be found here:
[https://www.myminifactory.com/object/3d-print-megalodon-fossil-shark-tooth-81202](link url)
I printed one full size on my resin printer last year and it came out beautifully.
Just for fun I wondered if I could print a big one on my filament printer.
Running it through the slicer it would take about 15 hours with a 0.4mm nozzle. Loads of supports required around the base. So I resliced for a 0.6mm nozzle. Still more than 12 hours and loads of supports.
But what if I could turn in at an angle to eliminate islands and make it a vase mode print?
So I tried it on my Printenstein III and it worked perfectly. 1 hour and 20 minutes for the main tooth and 8 minutes for the cut off piece. No supports, completely hollow.
There is a difficult folded bit at the bottom back side so I cut that off and printed it as a separate vase mode print. It needed to have a base anyway so cutting was essential.
Proof that it's hollow:
The original file produces a 13cm tooth (measuring the long edge of the tooth - everyone knows that's how you measure a meg tooth). The 0.6mm nozzle version is a 19cm tooth.
I thought that was great but I've seen Meg and Meg 2 so it seemed a bit of a baby Meg tooth even though the largest fossil Meg tooth ever found was about 19cm.
So I put in my 0.8mm high flow nozzle and printed the tooth again. I used 0.1mm layers and scaled it up a bit more.
This time there was a slight issue on the undercut area but the printer kept going and recovered beautifully.
So the big one being printed with the 0.6mm one beside it for scale:
Proof that it too is completely hollow too:
And all three compared:
The prints are not flawless because there will be holes in the shell but they can be easily filled:
Everyone needs a giant Meg tooth on their shelf.
Happy printing,
Tony.
@luc Also I should have removed the semicolons in front of each line before posting the code. I now use another acclerometer.
@luc You have to send M955 P0. Sorry early in the day for me! There are defaults for the other settings which is why it works for you.
@luc That is the hardware wiring part of M955. You must also tell Duet the communication settings.
;M955 P0 C"spi.cs4+spi.cs3";LIS3DH
;M955 P0 I25 S1344 R10 ; S1344 is 1344Hz sample rate. R10 is 10 bit resolution for LIS3DH.
You can enter all of the parameters on one line if you like.
Make sure to check your orientation for the I parameter and insert the appropriate two numbers.
@luc Please note GND is on pin 2 of the temperature daughterboard connector, not pin 3 as you listed.
@Ce72 Just to eliminate it as a possibility can you turn of Pressure Advance to see if there is any effect.
@bernardomattiucci
When I use higher temp materials I add insulating panels to the sides of my printer. But 18C is pretty cool. You probably want to add an insulated cover too.
Nothing expensive. I just use foamcore boards cut to size.
There was an issue with cracked drive gears or rusting on the Hemera a long time ago. Might be worth having a peek to see if that could be causing your intermittent retraction issues.
Check this link for more details:
https://e3d-online.com/blogs/news/hemera-issues-clarification-and-update
@bernardomattiucci
It is surprising that 1mm of retraction is too much. At least it is working now.
You can upload your files from your computer to the Duet 2 Wifi over your network using Duet Web Control. It takes a few seconds then the entire file will be on the Duet microSD card. No need for the computer after that.
The Duet 2 Wifi can take up to a 32GB micro SDHC card. Plenty of room for lots of files.
It is possible to uninstall copilot. Do a search for 'How to uninstall copilot'. The most annoying piece of software MicroSponge has ever released.
I had a Hemera + Volcano and used 0.6mm of retraction. 1.0 mm is not a lot and I don't think it would cause issues. Maybe heat is creeping up from the Super Volcano over time. If that is the case you need to improve cooling.
@Triet Oops! Yes the zip file. Glad I could help.
@Triet You also need to update WifiServer.bin and DuetWebControl-SD.bin.
Modix printers use Duet Controllers.
@Exerqtor I had what may be the same issue. I added 0.15mm to Deretraction Extra Length. I am using PrusaSlicer.
I wasted a lot of time trying to fix the issue with PA, retraction, acceleration, jerk changes. Nothing seemed to work.
I hope this is your issue as well.
In PrusaSlicer the setting is in Printers>Extruder 1>Retraction>Deretraction extra length.
@MurphDurtay if it helps here are my settings but not a V2:
Duet 2 Wifi, Bondtech LGX Lite, E3DV6 hotend, 0.4mm NozzleX.
M584 E3;
M350 E16 I1;
M906 E400;
M92 E568.3 ; (eSun PLA+)
M566 E8000.00;
M203 E6000.00;
M201 E5000.00;
Your current is way too high. The Bondtech specs state 550-650 mA.