We only disable the brake when printing, any other time it is on.
The whole reason we use it is because of the restart behavior. Otherwise we could always just park the bed and not have to worry about it.
2 Likes
You can go into the klipper advanced tools and set the gpio pin you want low at start to be liw. I was using the tft tx pin. It will require a firmware rewrite, but if you use kiauh, it is pretty easy to do:
-
option 4: Advanced
-
option 1: Build
option N for new config if presented with the option
- enable extra low-level config
press space to enable and an extra menu item at the bottom will appear
step through each option and select stm32 processor F407
8 MHz, 28 kb bootloader, USB comm
If your brake was attached to the SPI bus MISO pin shown here:
open the GPIO pins to set at micro-controller startup
In the extra field, enter ā!PC11ā if you want it low
then build and flash like you did when you originally set it upā¦ find the klipper.bin file and rename to firmware.bin and make sure it changes to firmware.cur
Going to change gears here and talk about the BIQU H2 V2S. I will get back to setting up the Z Brakes properly afterwards. Right now the Z Brakes turn off whenever the controller is on. That is fine for now for other testing purposes.
I am getting some serious slipping on the filament in this extruder. It is hardly extruding a constant stream at all. I have tried tightening and loosening the tensioner on top of the extruder but donāt get much change either way. If I extrude 100mm at even just 5mm/s I will get extrusion lengths anywhere from 25-75mm. Definitely slipping.
I have the Hemera still on my V4 and I wanted to feel the grip strength on it for comparison so I extruded it and applied some opposing tension manually and it was slipping through my fingers it had such a good pull.
Is the H2 V2S that bad to already be this weak after maybe 25hrs of print timeā¦. or am I missing something here? Might switch my V5 back over to the Hemera..
1 Like
Ive used the H2 V2S Lite on a few printers and the tension on it can be a bit funky. But never slipped that much! Do you have the arm thrown the wrong way? I would think it wouldnt extrude at all with it the wrong way but I could be wrong. I dont know how much different the normal V2S is from the lite to say for sure.
I have the the arm pushed away from me which I assume is engaged.
For SNG try moving it the other way and see if it gets tighter 
Just tried itā¦ I got the S but no G. Didnt work 
1 Like
Its been a while since I have messed with my V2S lite, but from what my 
memory recalls, the tensioning screw was backwards. You turned left to have it grab more.
You might also take the extruder apart and make sure there is nothing where it shouldnāt be.
1 Like
fixed that for youā¦
1 Like
Arenāt you still running one??? As much as I hate to say it, Iāve had better luck with it than my Orbiter V3. They should have stopped at the V2, its awesome!
āRunningāā¦ not reallyā¦
Is it still on there? only because I donāt want to spend the money for something else lol
1 Like
The catching of the filament when I try to load it is a major painā¦
And itās covered in black dust, so I assume it has the same problem @vicious1 had with his V2S where its grinding itself up on the inside
1 Like
I ran a Hemera originally on my V4. The only problem with it was growing old waiting for a print to complete. It didnāt like a lot of mmĀ³ through it lol.
it does print ok, and was able to push up to like 30 mm3/s through it with PLAā¦
but the noises, teh grinding, the catchingā¦
I had to leave a rubberband tight around that lever to quiet the rattling noises, etc.
Iām waiting to rebuild the XY on that printer and Iāll replace it with something else, maybe the Jabberwocky
1 Like
My original h2v2s that only flows 12mm3/s is still working but the aluminum wear region inside that gets worn out was hacked by adding a stainless washer and it is still going. The issue with the h2v2s is that it will never go fast because it is flow limited and in my opinion is a bad pick for an mp3dp that has a much higher speed capability with the innovative corexy drive system. The flow quickly becomes the bottleneck after the system is tuned and will create under extrusion conditions unless regulated in the slicer. I picked the h2v2s solely for cost and didnt find the fine print about flow until later. The light weight of the h2v2s does give high acceleration capability to the system though so it isnt an entirely lost cause and has a marginal speed gain over a full sized nema 17 motor mounted on a core (no numbers for this, just extrapolating that more weight is slower).
Do you need a gear or some other part for it? I have a set of spares and if i have what you need you are welcome to the parts. Let me know.
The h2v2s lite flows so much more at 45mm3/s but ive had issues getting it configured correctly because the bed sensor position has to change because the nozzle heater is vertical and everything has to moveā¦ And some parts modified and reprinted. Initially feeding filament has always been tricky, but with some care and patience can be done.
So far the lite has been great from a printing standpoint. But there will be more to say on it once the color changer is working. Ill have 2 systems with h2v2slite setups and one with the h2v2s extruder on it all working hopefully here soon.
I have an H2V2 Revo and it has been great so far.
With that said I have destroyed a couple other H2ās due to the gears grinding themselves into oblivion.
@Michael_Melancon I have a replacement for the V4 center carriage to allow any of the dragon burner compatible toolheads if you are interestedā¦ I have not fully tried it yet as I am ion the process of getting the V5 up and running with the AntHead (best choice so far)
Yeah, I was following along when you were starting it, but I got so busy I wasnāt able to follow up.
Due to some other stuff I had issues with and some other projects I want to do, I want to try to retrofit the Trident or 2.4 XY onto the V5,ā¦.. you knowā¦.. one dayā¦.
Who knows what will happen by the time I get around to it lol
For now, I have a Qidi Q2 I ended up buying, and one day Iāll make the V5 a more active second printer. It was just too loud to run in my bedroom at night.
So it will become my āgarage printerā at some point
Reading all this does not give me any high hopes about my H2V2. I am going to throw an old Hemera on there and see how she performs.
Where can I find a part fan shroud for the V5 and a hemera?
1 Like
If you arenāt having problems, Iām not sure I would abandon ship if itās already functional.
We have had some issues with V2 and V2S Lite thoughā¦ so just keep an eye out.
Didnāt mean to scare you off 
1 Like
You sure you didnāt mean to???
All jokes aside, Before abandoning it I would take it apart and see if there isnāt a piece of filament or something blocking things inside there. Post up some pics if you donāt see anything obvious, maybe one of us will lol