August 2020 Build

Almost finished my MP3DP v2 build. Just waiting on a thermistor for the heated bed, but otherwise complete. In the meantime, it’s printing PLA well on masking tape on a cold bed.

I used a SKR Pro 1.4 with TMC2209 and a FYSETC mini 12864 display. A few photos starting with the frame cuts on the MPCNC:

Assembled:

The first four prints off the printer:

The first print just stopped - I think it may have been a bad connection or related to the power supply. The second print of the calibration cube finished. Third print is the first iteration of a mounting bracket for the SKR board. Fourth print was a test of vase mode.

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Is it an SKR 1.4 board, or an SKR Pro board? The newest Pro is v1.2…

Hi Bill. SKR 1.4 Turbo - not Pro. Good catch.

Hi @Kuhlio,

Which firmware did you use on your SKR board?

Thanks,
Kees

Hi @keeze

I initially started with Marlin-bugfix-2.0.x and then made necessary changes. I compared to firmware in the V1 firmware for MP3DP_Ramps_16T to find key code changes needed for the printer. I also followed a couple YouTube videos to get the key code changes needed for the SKR board: https://www.youtube.com/watch?v=oHMZ0ocTYvM and https://www.youtube.com/watch?v=-Gdk0wHg51w

The most difficult part was getting the display to work properly. I did need to flip around the notched connectors on the Fystec Mini 12864 panel; and I eventually found the needed code changes for Marline online. This page was the most helpful: https://wiki.fysetc.com/Manual_for_Mini_panel_on_SKR/

After running with Marlin for a while, I wanted to migrate to klipper as I got used to some of the features after getting klipper working on MonoPrice Maker Select v2 (Wanhao i3 Duplicator clone). I have been running klipper since.

If you have any specific questions, I would be happy to try to help. I can also post code, though I am quite unfamiliar with github, but perhaps it is time to learn.

Hope that helps,
Kuhlio

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We should probably make an Skr Pro MP3DP firmware… That would be a closer starting place.

The latest stuff we’ve been working on is in MarlinBuilder releases. There are a few MP3DP versions, but not one with the Skr.

I opt for the SKR 1.4 :wink:

I posted my Marlin files and my klipper config file to GitHub in case it may be of use to others: https://github.com/Kuhlio/MP3DP_Firmware

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I’m running pretty much the same setup except with the BTT TFT24 for the control screen. Such a huge difference switching from the old RAMPS to the SKR board. Stealthchop off for speed, and on for quiet. So much nicer.

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While I am passed the 50, I don’t notice much of the noise, my kids though are constantly complaining about high pitched noise the I turn my deltaprinter on (Ramps 1.6). That is the reason why I bought 2 SKR boards with TMC2209’s.

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@Kuhlio Thanks!

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My printer with the SKR / 2209 is near silent. Movement along the Y axis moving the bed is most noticeable sound, but really isn’t loud at all. I also ordered a Sunon “MagLev” fan to replace the stock MK8 extruder fan, and it is so quiet, I need to actually check to confirm it is running.

Those fans look great, do you have the model number of the one you bought? They have so many options. I think a 40x40x20 would have a little more power to work as a print fan than the inexpensive ones I have. Printing faster is requiring a little more cooling than I have, and to quiet it down at the same time is a bonus.

I picked up the 2 pin 0.8W variant of a 40x40x10 from here: https://www.aliexpress.com/item/4000366306453.html?spm=a2g0s.9042311.0.0.7ca84c4dNReKZp

Again, I used it for the hot end cooling fan but should work great for part cooling as well.

I searched for a 40x40x20 option and found this as a possibility: https://www.aliexpress.com/item/1229389064.html?spm=a2g0o.productlist.0.0.623f7f51Lo6Kw8&algo_pvid=0b16d80c-1b85-4cd5-bd38-aae7803d0b89&algo_expid=0b16d80c-1b85-4cd5-bd38-aae7803d0b89-0&btsid=0b0a556a16046821910027017e41d1&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

Thanks again for your great designs!

I have got this one (since I go 24v :wink:

https://www.amazon.de/-/nl/gp/product/B07CV6VTWB/

Hey @Kuhlio

Did you use sensorless homing? Or did you clip the diag pins of your TMC2209’s?

Cheers,
Kees

Hi @keeze

I opted to heat up the solder on the diag pin and quickly pull it up with pliers. I didn’t pull it all the way out, just up so it doesn’t insert. Really quick and easy, and my thinking is that is that I can move the pin back in place in the future if I wish.

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Tnx, fired up my desolderinggun :slight_smile:

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