Canned ERCF board v1.0-beta2

Gixxerfast

So, the latest beta version of the Canned ERCF expansion board is back from JLCPCB and is ready. It seems to work fine though I'm in the middle of building the actual ERCF

It will require some more testing to be sure that there are no major flaws left.

Canned ERCF board

The main differences to the first version is:

Added a 4.7Kohms pullup resistor on the TX/RX UART line to keep the line high when Duet firmware momentarily disables UART when reading and transmitting. This can be handled with software changes but that will make maintenance harder as there will be more code to keep up to date.
Added a 480 ohms series resistor on the io0.out PWM pin (to the servo)
Added over voltage protection (up to 30V) to the io1.in, io2.in and io3.in inputs
Added VIN voltage monitoring.
Added separate CAN connectors to make it easier to hook it in the middle between the board and for example a toolboard.

I have made a fork of the Duet3Expansion firmware here which with the changes above only required changes to the SammyC21.h configuration file.

There is some history regarding this board in this thread.

R4ffers

@gixxerfast This awesome, I may have to get some

Gixxerfast

@r4ffers Well, I have some extra boards to sell. The tricky part is to get hold of a Sammy. the ATSAMC21 is a bit unobtanium at the moment (for us regular folks anyway)

Th0mpy

@gixxerfast I'd be interested in buying one if you still have one available. Perhaps a trade?

Gixxerfast

Apologizes to those who contacted me about the board, I have been (and still am) a wee bit under the weather but I'll respond to you shortly.

Anyway, I thought that a good test for the board would be to hook it up to drive the A & B motors on the Voron V0.1 running two Nema 14 motors at 1200 mA at 4000 mm/s^2 (5000 travel) and see what happens.

Said and done. Start:
https://youtu.be/Jh0_QzTjQ-Q

End:
https://youtu.be/QYoGkQ9I5lc

Finished test print:

With this I'm pretty sure it will ahev no problems winding some filaments up and down with th ERCF

Btw, the enraged rabbit feeder is on the way

I have another new version in mind that utilizes more Duet hardware but it requires more changes to the firmware changing the slave addressing. Shouldn't be more that a few places. Maybe a couple of ifdefs is enough

I just love the Duet hardware and RRF. Swap two drive cables. change two lines in the config.g and restart and you have swapped motor drivers to another board.

jay_s_uk

I have 4 of the Canned ERCF boards available.
They come with all the connectors required. All that's required is for you to purchased a SammyC21 and to provide 2 x 2209 drivers.
https://www.chip45.com/products/sammy-c21-1.0_atmel_smart_arm_sam_module_samc21_usb_dual_can_duet3d.php
I have also compiled the firmware for 3.4.2-RC2. It's available here https://github.com/jaysuk/Duet3Expansion/releases

They are £18 + postage.
I can also supply 2 x Fly 2209 drivers for a further £10

dc42

Filastruder still has the SammyC21 in stock according to their web site, https://www.filastruder.com/collections/electronics/products/sammy-c21-v1-0-duet3d-module.

R4ffers

@jay_s_uk Hi, do you still have any canned ercf left?

jay_s_uk

@R4ffers I do

R4ffers

@jay_s_uk woohoo lol, It seems that I may have a Sammy on the way.

Could I buy a board from you please?

Morane_3803

@jay_s_uk
Hi there, is one of the Canned ERCF boards still available?
If yes, how could I pay for it? PayPal?
Thanks a lot. Regards Martin

joeko

can i order the Canned ERCF board ?

Th0mpy

@joeko Where are you located?

joeko

@Th0mpy germany

Th0mpy

@joeko I have a couple that I had made, but in the US. It would be much less expensive to just order it assembled from PCBWay or similar outfit.

Th0mpy

@joeko That said, let me see if I can publish it on PCBWay and you could just order it assembled from them.

joeko

@Th0mpy ok. but is it also possible to use an Expansion board with can conneted ?

Th0mpy

@joeko I don't see why not. The ERCF board is really just a purpose-built toolboard. The benefit to the expansion board is that it's tried and true hardware, less chance of major issues The big obvious difference is the form factor.

joeko

@Th0mpy yes and the price
but until now i am only think about. does this mmu system works without big problems ?

oliof

@joeko define "big problems" -- I know a bunch of people that use ERCF successfully. Requires some extra considerations, but that's to expected if you add multiple different rolls of filament and additional steppers....

Th0mpy

@joeko It CAN work well, but you need to be ready for some failures and tweaking. There are so many things that are out of the control of the device itself so you need to be prepared for that. It's not for the faint of heart.

joeko

i have ordered one and will use it with an expansion board.
i will see

o_lampe

I've spent some time dreaming of multi-colour FDM printing. But the filament colours available are good for toys, but not much else.
And colour mixing doesn't work as expected.
I discovered resin printers recently. They produce a whole army of spectacular fine detailed figurines in no time and handpainting them comes closer to my expectations.

Th0mpy

@o_lampe I tend to agree, however, I do like to add inlayed pieces to my parts. Most of what I do is more functional parts versus toys, so I like to add indicators, logos, etc.

The biggest reason for me is to use soluble supports. Understood that resin printers do supports better, but I really couldn't get over the cleanup and smell. I may try it again when I can move the operation to my new shop.