Posts made by dragonn

@solo3d I am doing something like that and using mixing hotends but they is a big problem with that - it is almost impossible to setup the steps/per mm or mixing ration perfectly right.
I think the only solution would be that the bowden extruder uses rubber wheels some kind and pushes a litte bit faster then the direct extruder. When setup right it would just slip over the filament when they is no space to push it.

This can happen. Actually you are lucky, sometimes can happen that a heater gets a short and just burns out destroying fuses or cables/connectors with it.
Just replace it.

As I said in the case when using an event loop, you can not just stop in and loop for some cycles and do nothing in the time if you have other things with still need to run. So you need some extra variables for tracking that your are in a debounce state, for how long and when you started and check them in every loop.
I am not saying it is hard, I wanted just to point out that probably is not a "5 minutes" job.

@BoA said in My wish : Inputs debouncing:

And debouncing is not a rocket science to implement.

That depends on you application architecture, many embedded system without RTOS use something like a simple event loop and implementing debouncing in isn't so simple as it sounds. RRF works on RTOS but it started without it so probably most of the system is a event loop.
It can be of course done, they are many ways to do it. I just wanted to say that something simple from user stand point isn't often so simple in the software

Could you just add a capicator parallel to the button?
Sometimes the best solution is doing it in hardware

@bot can you even use wipe while retract when doing firmware retract? I think not

@oliof said in Stop Firmware Retract and Pressure Advance from Fighting:
it does not add to my issue here.

Ok but what exactly is the issue? Doing PA when doing retraction, what does it cause for you? Because like I describe in my opinion that by itself isn't an issue and shouldn't cause any problems.

Based what are you say, that how it should work.
PA is for compensating pressure build up in the hotend in different speeds.
When PA would not do its move on retraction you would need different retraction length on different printing speeds. And I can confirm that effect exist on bowden and that is really important when having a full metal hotend where you can not just make the retraction longer at some point.
I was having that issue that without PA when printing 3dbenchy the retraction worked perfectly fine up to the moment when the model cross-section goes small and the slicer slows down, then I would get clog up. With PA that is fine and I don't have to increase my retraction length so it clogs up because of full metal hotend.

I use both of them and don't see a problem.

@T3P3Tony what kind of trigger do you have in mind?

I was something like that but didn't found yet how to actually do that.

It does make sense, I am using it right now.
I have a light Nema 14 direct drive and a large nema 17 bowden.
The whole point of that bowden is to feed the filament inside the printer enclose so the small direct drive doesn't have to work so hard to get the filament.
They is one big problem with that, it is hard to get the ratio perfectly, a slight amount to low on the bowden extruder and after some hours of printing it will span the filament bowden the bowden and direct drive. A small amount to much and it will tangle inside the printer enclose.

@Veti said in Would be nice to set FAN target speed by RPM instead of PWM:

@dragonn said in Would be nice to set FAN target speed by RPM instead of PWM:

Sunon MF50151VX-A99

what about he MF50152VX-1L01C-Q99?

24V and pwm.

No idea, first time I see that model. But it isn't available outside in regular shops, only on aliexpress. I am buying A99 in a regular electronics store and paying less for that one.

@BoA In my opinion they is only one, good 5015 fan - Sunon MF50151VX-A99
I put it in all my printers and recommend to every one.
Even that it is 12V only it is worth the hassle to add a step-down to run it.
It maybe not the quietest at 100% but is super powerful and if you need to be more quite just run it slower.

@BoA said in Would be nice to set FAN target speed by RPM instead of PWM:

@dragonn RPM is basically repeatable measuremet of fan speed between fans models. If You have some blower let's say 5015 I think it is safe to assume that different models (that have generally same size) will pump similar amounts of air at the same RPMs.

I am pretty sure the same models of a fan will give the same RPM at the same PWM output. But a different model, well of course but also a different model at the same RPM can give different air flow.

But what gives the RPM you?
The fan flow also doesn't scale linear with RPM.
I think even the fan flow is more linear to the PWM input then RPM.

This is still a standard in 2020, just for different things. And RJ45 would be an overkill for CAN bus and just to bulky.
Also you could really read that before you did by the board, and they is no "HOPE they fit my crimpers". Or you have RJ11 compatible crimpers or not, you should know what tools you have...

Is they any way to mirror extruder movement without loosing filament management?
For now I setup just a mixing extruder with the ratio of 1:1.
I have a really lightweight Cycloidal extruder with a NEMA 14 on my hotend and a big bowden extruder with just feeds the filament inside my printer enclosure so the small NEMA14 doesn't have to pull the filament so hard from outside.
For now when you setup mixing extruder you lose filament management. My setup isn't an actually a mixing extruder. Note that the extruder have really different steps/per mm, then Cycloidal has 4250steps/per mm and then bowden 850steps/per mm
I am running RRF 3.1.1.

Any 5 inch screens witch could run with LVGL?

Mine works fine with all materials. Cooling is done with two 30x30 fans (one 10mm thick and one 20mm thick) in a push pull configuration. A really like it and prefer if over original V6. Changing nozzles is much, much, much better then on V6

@Nxt-1 yeah it is ~1mm, but if you can flip the pulley you get a nice, big contact surface.
For my application this is enough and it was the only way to fit it in without doing a major redesign to my printer. It is a heavy modified Hypercube Evolution, 10mm belt and gates pulley and roles.