The parts are modelled in such a way that the M3x8 screws extend 6.1mm into the slot (see first picture below), which is larger than the 6mm depth of the slot. In addition, due to compression of the part, as well as the possibility of a screw being over nominal length, the actual distance the screw goes into the slot can be even greater. In my designs I try to leave at least 1mm of space between the screw and the slot bottom (i.e. screw should extend 5mm into the slot, which means a distance from counterbore to the face that touches the surface of the extrusion should be at least 3mm for a M3x8 screw) to avoid this. A quick survey of Trident and V2 parts shows a range of 1.0-1.6mm for screw to slot bottom distance.

Affected parts (locations circled in red below):

• Gear_Box_Front (4 screws)
• End Bypass (1 screw)

I think... Not sure of the exact history here.

It looks like one microswitch is needed for each ERCT lane. The master BOM on Google Sheets leaves these out of the count.

Also, the modified toolhead may need two microswitches and two 5.5mm ball bearings if you elect to install both sensors. The spreadsheet only shows one each. I would hate for someone to order from China and discover they're one short three weeks later. 🙂

Is it possibly to print this test pattern with just 48 changes?

https://www.printables.com/model/567217-4-color-transition-module

Would be cool to add the numbers of this filament changer too.

Had to go looking for the encoder tool, can we please add it to the Tools or the encoder section of the STL's

https://github.com/mneuhaus/EnragedRabbitProject/blob/e0272b7838a99c0ad8416ad5d3ec9c45b1973cac/usermods/Binky/STL/Tool_Encoder_SlottedWheel_PushTool.stl

Hi!

Would it be possible to change the colors of the parts represented in the CAD and documentation for the Cottontail clear parts?

In the cad / documentation currently:
[c]_Coupler_Block_xN.stl is rendered in accent colors
[a]_LED_Carrier_xN.stl is rendered in an off color interpreted to be the clear part

I think if you flipped the color of the parts, it would greatly improve the understandability of the documentation and CAD.

Thanks!

Example:

Maybe something like this would be better?

Hi ERCFv2 Team!

Absolutely love the release! I'm already printing parts now :)

Based on a brief discussion on Discord, would it be possible to include a note in the FAQ regarding what can be "carried forward" from V1.1 + the popular mods (Springy, Triple-Decky, Binky, SturdyBunny)?

For example, the written text on a number of the parts bear a strong enough similarity to their mod counterparts that users may mistakenly think they don't need to reprint unless they see obvious changes.

Based on the discussions, the only parts that appear to be 100% carry forward are:

• The parts noted in the build guide as carry forward from V1.1 stock builds
• The Triple-Decky C7.0 filament blocks

Are there any more that fit this description?

Hi,

in the manual the text specifies to use the Microfit motor mount for the local MCU setup, which is wrong by the text on page 44.

which one is the right one?

The manual page about Wiring the MMB (page 125 on current version of the documentation PDF) have pre-gate sensors using MMB connectors STP1 - STP8 and also shows jumpers ON for DIAG1 and DIAG2 (gear and selector motors). Based on MMB documentation. STP1 / STP2 and DIAG1 / DIAG2 share same GPIOs (PA3 / PA4). Also the STP9 and STP10 are not used so a quick fix is to shift the pre-gate sensors to use STP3 - STP10 and reserve PA3 and PA4 GPIOs (used by STP1 and STP2) for DIAG1/2 signals.

Is this intentional? There's a single layer space between beed and the rabbit figure in the Support Arm file.

hi guys,

i am building my ercf using a local mmu and therefore skipped from page 18 to page 21, and so on. "Skip to page 21 if you’re using a local MCU."

Then continued with the manual and build the whole thing without ever attaching wires to the microswitch.

Of course that was dumb, and maybe I overlooked something, but since every other step is explained in such fine detail, I think it would be important to also show where the microswitch cables go, or at least a short sentence that we should not forget it at page 28 would be awesome :D

The files SB_G2E_Front_Body_EBB.stl and SB_G2E_Rear_Body_EBB.stl contain both Toolhead and Entry sensors, but they are located on the folder Recommended_Options\ERF_Filament_Cutter\Stls\2_Toolhead_Sensor. Shouldn`t they be on Recommended_Options\ERF_Filament_Cutter\Stls\1_Toolhead_And_Entry_Sensors ?

The link to the manual is wrong in the readme. It links to a manual named ERCF_v2_Manual.pdf. The actual name is ERCF_v2 Manual.pdf

There are a few abnormalities around the assembly of the selector mechanism: nothing difficult to figure out, but they stand out after the earlier part of the manual

Page 106: calls for 2x M3x12mm SHCS and 1x M5x30mm BHCS which are in the exploded view, but aren't actually shown getting used until later

I think the M3x12 could be shown going in on page 108. They currently don't go in until page 111, which also works, but if they aren't going in until there, I'd suggest not listing them on page 106

the M5x30 doesn't actually seem to be required in this part of the manual at all. It's called out again on page 116, which seems fine to me. (I think, similarly, the other one is also called out twice: page 74, and page 116)

Why am I noticing such nitpicky things, you ask?
Well, my assembly process was, each time I hit an exploded view, I'd locate all the parts it lists, and lay them out on my table. Then I'd follow the assembly steps until my table was empty again. If I had parts left over, I knew I'd missed something. This worked very well, right up until page 108, then it got a little weird.

The manual on page 54 states

2x 6x3x2mm Magnets

It should instead be

2x 6x3mm Magnets

Page 8 states

"ADDITIONAL TOOLS
We provide additional tool recommendations in
our sourcing guide. Visit https://vorondesign.com/
sourcing_guide and switch to the “Voron Tools”
tab at the bottom of the page"

This is a potential source of confusion, since ERCF has it's own sourcing guide/BOM. I would suggest phrasing it as something like:

"ADDITIONAL TOOLS
The tools needed are similar to those used building a
Voron. For recommendations, visit https://vorondesign.com/
sourcing_guide and switch to the “Voron Tools”
tab at the bottom of the page

The SB_CW2_Body_EBB.stl does not fit the standard cable cover. As this is a nice option for a lot of stealthburner PCBs, it might make the most sense to just provide a link to or a copy of the BTT cable cover for EBB in this repo that fits this specific design. EDIT: I've now printed all of the ones on the BTT repo for EBB to test, and I can't find one that actually fits the EBB body accurately. The one I previously linked is about 5mm too tall, and the current one is rounded by the ECAS, leaving a bit of a gap. It seems that perhaps there's not a good, current cable body STL for this part?

This is an issue as users may casually decide to just go with a single sensor, and it is not obvious if you aren't initiated on what "EBB" might refer to that you need an alternative cable cover to fit this design.

Had to figure this out for myself. There's no CAD for Easy BRD either, so it wasn't immediately obvious where and how to mount the board. Would be good if there was a document on the Git repo at the very least, but ideally incorporated into the manual.

english:

and they should have a read me with the list of materials needed for the Project and also the number of pieces to print example for 4.

because I am French and frankly I have the complete file and I am totally lost because I don't even know which part exactly goes where and the number of parts to print.

so it would be great if the creator or someone from the community helps people who are lost or new

anyway great job

french :

et ils faudrait avoir un lisez moi avec la liste de matériel qui faut pour le Project et aussi le nombre de pièce a imprimer exemple pour 4 .

car moi je suis français et franchement j'ai dl le dossier complet et je suis totalement perdu car je c'est même pas quel pièce exactement qui va ou et le nombre de pièce a imprimer .

du coup cela serrait le top que le créateur ou une personne de la communauté aide les personne qui sont perdu ou nouvelle

en tout cas super boulots

Supports/EASY-BRD/[a]_ERCF_Easy_Brd_Bracket_Bottom.stl

Part is missing the built-in support material in the repo

Hey all,

CW2 main body for filametrix is missing a piece where cable/board cover goes. It's a two sensor version. Marked on picture below.

Hey all,

In CottonTail buffer is hard to print that rabbit in the middle 'cause it starts on second layer...

Piece of filament labeled "M" should be "P"

Does the apron leds do anything besides throwing light inside the Voron printer through the top panel?

There's a very narrow clearance between the toolhead sensor microswitches and an SB2040v2. Other toolhead PCBs are probably affected by this too.

To prevent shorting, I recommend we add a piece of kapton tape to the BOM, so people can opt to add it behind the toolhead PCB, should it be required.

The new easier to print [a]_BTT_MMB_Support_Arm_Endcap_Bunny_Outline.stl does not have the 3 alignment cutouts to allow it to mate with the coupler blocks. The old version did have these cutouts.

Also, the hole for attaching to the last [a]_Support_Arm_Mount_xN doesn't line up either.

I am able to retain my 6 lane setup from V1.1 without the bypass and I am sure others are as well. It would be nice for this to be included, however it can be done in the slicer fairly easily as well by adding negative volumes, however it removes the second set of screws to hold it to the extrusion.

Cell B17 data validation has commas in text which don't work in US (comma is the default separator in the US).

This is a trivial issue but I am reporting it anyway.

Please see the picture. The notch just needs to be moved 7.5mm to the right.

The 2x sensor options, with and without filametrix, differ drastically at the top gear sensor. There is no hole to visibly see the position of the ball bearing, and it makes it impossible to know whether it is engaging beyond a very faint click (I'm hard of hearing).

Would appreciate if the two options would match. I had previously installed Filametrix, but I am removing it.

As per title, this file is missing the Male + Female keyways to lock it into the main body.

BOM shows 5.5mm Ball for CW2 main body for filametrix looks like a 7mm ball is needed for the bearing switch.

on page 4, the manual states

"Beware that this project requires a well tuned printer and slicing profile, as there are many press fits and plastic on plastic
mechanisms. You should first print the ERCF_Calibration_Tool.stl, test the part, as shown in the manual, tune your printer and
profile if needed, and then only print the rest of the parts"

This should mention that you actually need to print TWO parts: one of the tests appears to be a fit test between the calibration tool, and the tophat.

(easy enough to figure out a few pages later, but I for one had already hit print before I got to the page saying how to read the thing...)

@gneu42 I think in your Filament_Block_End.stl from your Reinforced Block End Mod the two little conicals holes are missing?

Git hash: 7f9bdc8

What i observed
For the encoder assembly on page 99 the diagram specifies an M3x8 BHCS when the assembly text below indicates M3x8 SHCS.

What i think it should do
Either diagram or text should be updated to the correct option or the text should be updated to indicate either screw type may be used.

Issue 1:
These files can be found in 2 locations on GitHub, and the BOM consequently lists them twice even though only one copy is required:
[a]_BTT_MMB_Box_Lid.stl
[a]_BTT_MMB_support_arm_bottom.stl

Located in:
ERCF_v2 / STLs / Supports / BTT_MMB / Buffermount_for_ERCT
and also in:
ERCF_v2 / Recommended_Options / ERCT_Buffer / Stls / Support Arm

Issue 2:
In addition "[a]_BTT_MMB_Box_Lid.stl" is incorrectly called "[a]_BTT_MMB_case_top.stl" in the BOM

Issue 3:
Tag plates
ERCF_v2 / Recommended_Options / ERCT_Buffer / Stls / Filament_Blocks / Tag_Plates
These files should be multimaterial [mm]
In addition, the accent colour is inverted from the CAD design (CAD has the numbers in accent, file naming gives the background in accent), was this deliberate?

The printed count cell O263 doesn't cover the whole range of parts.

Hi,
I know it's only been released, but are there any plans on adding cutter and/or filament sensor to XOLs current build (current build isn't XOL2 by the way):
https://github.com/Armchair-Engineering/Xol-Toolhead/tree/main
My combo is Orbiter2 and Rapido2 uhf, I've looked into some files but my CAD skills are too poor still to get this done on my own :(

The support is only partially printed. Different slicers and settings show the same result.

Hello all,

2 toolhead sensor

Extruder sensor malfunctions, gap between wall and ball is a bit too big so I got false negative signals. Second issue is holes for M2 screws are a bit too big so it's hard to fasten it properly.

Toolhead sensors works perfectly. (upper one)

I've had a really good experience with the docs so far. What a huge amount of work must have gone into this!

However, one thing has tripped me up not once but twice, in both cases costing 20 minutes or more of backtracking. It's probably an issue inherited from Sturdy Bunny or V1 of the ERCF manual, but the fact that a lot of people will be upgrading from V1 likely makes it more significant.

Page 45 helpfully advises, "Make sure the wires are routed in the channel between the 2020 extrusion and the Gear_Box_Back. If you route the wires through the other opening, you won’t be able to connect the wires later!"

The problem is that by the time you reach this instruction, the pass-through area has already been fully locked down. Unfortunately, it isn't large enough to accommodate any sort of connector, even a JST. If your cables have connectors on them, you have to de-construct all the way back to page 34. In particular, you have to release the set screws on the 20T pulley and remove the gear wheel from the D shaft, because there are screws that hold earlier parts together that can't be accessed through the gaps in the wheel.

As I said, I blundered into this problem twice. The second time, I was actively thinking "make sure to keep the cables routed properly so you don't run into that same problem again!" I had forgotten the details, though. The fact that several parts have cutouts for cables lulled me into a false sense of security. The actual pass-through is small, asymmetrical, and half lined with sharp-edged 2020 extrusion, so it doesn't really announce itself as the designated route.

It would be helpful to have a note at the top of page 34 that says something like, "Installing the Gear_Box_Back will finalize the path out of the gear box for ALL wiring in this half of the ERCF, including the wiring for the endstop switch, the gear motor, and any wiring that emerges from MicroFit connectors (if you use them). You can thread wires through the gap later, but there isn't enough room for crimped-on connectors. If your wiring is pre-crimped (e.g., you are upgrading from ERCF V1), make sure that ALL wiring goes through the cable channel NOW. If you do end up with a straggler cable, it's likely more time-efficient to cut off one end and recrimp than to disassemble the gear box."

Page 10:
"(tested up to 14 tools but test team)"
should be
"(tested up to 14 tools by the test team)"

Instead, there's [a]_Support_Arm_xN.stl duplicated as [a]_Support_Arm_Mount_xN.stl

Checked the upper and lower case.

*) Lower case does fit the screw holes, but it does not fit the board. The lip needs to be wider.

*) Upper case does fit the screw holes; does NOT fit the board due to the components being super close to the screw holes.

Hi,

there is no reference in the manual (that i could find) to the 2 parts top hats, how to assemble them and so on.

Please make cuts in the 2020 mounting parts for the T-Nuts.
The parts dont hold in the 2020 extrusion.

wrong

ok:

affected parts:
Stls/Filament_Blocks/End_Bypass.stl
Stls/Gear_Box/Gear_Box_Front.stl
Stls/Filament_Blocks/[a]_End_Bypass_Foot.stl

I wanted to replace my NEMA14 with a NEMA17. When trying to remove the NEMA14, I found that I actually had to disassemble the entire ERCF to get the cable out without snipping it and re-doing the housing. An extra few millimeters here would really help with maintenance.

The manual at page 133 indicates M3X16 screws to connect support arm and mount while M3X20 are necessary

Dear friend, hello,
I saw the introduction, Manufacturers: If you want to be included, please contact us. We are happy to validate your kit/parts and then add you to the list
I am William, a sales engineer at FUSHI Bearing,
And I really want to participate in this validation.

We can provide high-quality bearing sets.
We have nearly 30 years of production experience in bearings,
Then we also developed some special bearings for 3D printers this year,
As shown in the LM8uu black chrome bearing below, the quietness and operating efficiency are 25% higher than RJ4JP-01-08.

We are willing to provide high-quality and cost-effective bearing sets for the community.
And we have experience collaborating with Prusa and other 3D brands.
Bearings play an important role in the energy efficiency ratio of transmission,
We are confident that we can provide better bearings according to your needs.
Improve the accuracy and stability of the printer.
If you are interested, please contact my email: [email protected]
Thanks

I printed the MMB Cover now multiple times and it always breaks the (same) 2 noses on the side to the ERCF.
Is there a possibility to have a more robust option?
I'm unfortunately not really good in making model changes myself.

Thanks