@Nxt-1 Wow! looks great. I'm surprised the stepper motor can handled all of that equipment on the one axis.

Just one question: Why not have the radiator and pump outside? Then you could close up the sides and retain more heat for warp-prone plastics.

@OBELIKS said in Pressure Advance Calibration:

@Munce31 If you are using the script @jens55 posted, you can add

print("M117 %.3f" % pressure_advance)

after

print("M572 D0 S%.3f" % pressure_advance)

Hi @OBELIKS thanks for providing that. It'll make it easier to watch the test print and see what pressure advance it current is running at.

@wilriker said in Pressure Advance Calibration:

@Munce31 You could manually add M117 <current PA value> into the GCode file after every change of PA.

Yeah I figured I could do that as well, but that potentially could be quite laborious. I was thinking more along the lines of something like M117 <current PA value> being added directly into the python script so that it can be automated.

Hi All

I've been using this python script to fine tune my pressure advance on my zesty nimble extruder. It has been a massive help in this process.

Just one suggestion - I don't know if it is possible - however, I would like to see what pressure advance setting it is currently at during the print. Preferably to be displayed like a pop, similar to how the Report PA macro works in https://forum.duet3d.com/topic/6181/tuning-macros-menus-accel-jerk-retraction-pressure-advance. Is it possible to add something to this python script to report current pressure advance? It would make fine tuning the pressure advance just a little easier by taking a chunk of the guess work out of it.

Thanks,
Vince

This delta looks awesome!

Is there any chance you'll be making the design available for others to create their own?

@droftarts said in Flashing firmware on Mac OS X:

https://brew.sh/

Thank you so much for this. Saved me a massive headache trying to flash my paneldue v3.0 5".

@Quadcells very keen to see how this goes. Please let us know. Thanks.

Also, I'm wondering if there is a way to make the 4th tower move simply as an offset of the Z height?

My understanding is that the current coding in RRF is for flying extruders, so it tries to maintain 'X' amount of distance between the extruder output and the hot end's entry point, effectively the length of the bowden tube.

The scenario I'm thinking of is for cameras, where you want the field fo view to remain at the same level or offset of where the print head currently is in the Z orientation.

@Nxt-1

Wow that looks like a fantastic piece of engineering. I guess you're printing in a heated chamber environment.

I see that your tower is driven by belt, so how do you prevent it from falling down with all of that weight on it?

Also, am I right in saying that you can have the 4th tower's end stop lower than the end stops of the delta towers?

@Nxt-1 said in Delta 4th axis length and limits?:

@danal said in Delta 4th axis length and limits?:

Following with great interest.

I can already tell you that the first version I designed of the 4th axis worked quite well. The arm was printed to heavy and the carriage I used wasn't ideal but it did it's job.

Thanks to this thread i'm very keen on having this on my heavily modified Anycubic Predator.

You mentioned that the first version worked quite well. Have you had any other revisions since?

What challenges did you encounter when designing and implementing the fourth tower?

Got a video of it in action?

In my case, I'm running a zesty nimble remote drive extruder. I'm planning on using a shorter drive cable and have the extruder motor, some-what in the middle, with a gimbal to minimise forces that the cable would exert on the effector. Also, I'll add the berd-air pump to the forth tower to reduce the length of the air tube and reduce the pressure drop that a longer air tube would induce. Perhaps also add the filament spool to the other side to reduce the length of filament to the hot-end. All just ideas at the moment. Will be interesting to see how it turns out in practice.

Anyway, I'm interested in hearing your thoughts.

Thanks,