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RepRap Samuel - A variation on the Mendel

Posted by silpstream 
Re: RepRap Samuel - A variation on the Mendel
September 12, 2017 05:10PM
here it is. the spool holder is just a few pieces of irrigation tubing and elbows I had sitting nearby for a temporary solution, though it's working really well so who knows. I used the same wades extruder I used on my larger one since I had a wades on the mendel the parts were already there.

My first benchy is pretty ugly but considering it worked straight away I'm not complaining.


Re: RepRap Samuel - A variation on the Mendel
September 13, 2017 03:07AM
@mcmasterp, Looks great! You're even using the melzi on this one. I do like that spool holder. Does it create extra wobbling being mounted up there on top?
Re: RepRap Samuel - A variation on the Mendel
September 18, 2017 05:57PM
well I haven't used it too much yet but the tubing is thin and its just stuck down on two 8mm nuts so its not firm, that seems to help it not add wobble
Re: RepRap Samuel - A variation on the Mendel
September 20, 2017 08:52PM
Hey Im trying to hook up an lcd to the Melzi but I realize I need to update the Marlin firmware to enable it. Any ideas on how to update it? I'm not sure if I can use latest Marlin 1.1.5 on my Melzi 1.0 board. Also I couldn't find a Melzi or sanguino board in arduino idea boards manager. I know it's a long shot to ask but I figure I'd try
Re: RepRap Samuel - A variation on the Mendel
September 21, 2017 02:29PM
Take a look for ramps 1.4 assembly guide It might help
Re: RepRap Samuel - A variation on the Mendel
September 21, 2017 02:30PM
anyone have experience using direct drive extruder with 3mm pla?

does the average stepper have enough torque to push the filament thru
with out some gearing?
Re: RepRap Samuel - A variation on the Mendel
September 21, 2017 05:58PM
@mcmasterp, running marlin 1.1.5 should not be an issue. I checked the boards.h file and you will find it defined as:
#define BOARD_MELZI             63   // Melzi
#define BOARD_MELZI_MAKR3D      66   // Melzi with ATmega1284 (MaKr3d version)
Check the processor on your board to see if it is the ATmega644 or ATmega1284.

Adding a LCD can be done, but the limitation is based on the processor you have. I have the ATmega1284 and it all just fits. You'll also need to figure out the correct pins to connect from the expansion header to the LCD (I can help with that if you know which LCD you will be using).

As for adding the board to the Arduino IDE, just go to boards manager and search for "sanguino". It will pop up and you just need to click on install.

I've also included a pic of the LCD that I hooked up for mine.





@bigkahuna, I run 3mm ABS on my direct drive extruder with no problems. Not sure if this helps you though cause I've not used PLA on it before.
Re: RepRap Samuel - A variation on the Mendel
September 21, 2017 07:08PM
ah ok. I see now you have to add the repository for the sanguino in the ide preferences before it shows up in boards manager. my melzi is 1.0 ardentissimo but surprisingly it has the 1284p chip which is nice. Im planning on using a .96" oled which is i2c, It should be supported in marlin as the sd1306. I have it wired up to vcc,gnd, scl, sda so I think all thats left is to alter marlin to use it and flash. Im hoping it doesn't screw anything up but we'll see. thanks for the info!
Re: RepRap Samuel - A variation on the Mendel
May 22, 2018 10:04AM
So I am printing the parts to make my own RepRap Samuel when I ran into a problem. The belt that came with my Mendel is an XL belt. Is there anyway to make it work with the Samuel?
Re: RepRap Samuel - A variation on the Mendel
May 22, 2018 10:36AM
Hi StardustDragon,

I'm not too familiar with this belt type and this is the first I've hear of it used on a reprap.

You should be able to reuse the belt clamps that came with the mendel for the heat bed. As for the x-carriage, that part is generic and I just wrap it around then use a cable tie to tidy up the ends.

If your original mendel parts won't work, could you send me specs (with picture dimensions) on the belt or the stl files for the mendel parts that use this belt? I can try to design the relevant pieces.
Re: RepRap Samuel - A variation on the Mendel
May 22, 2018 01:05PM
Yeah it does not seem like a common belt type! I think I might be able to re-use it but I'll try to get some specs for you.
Re: RepRap Samuel - A variation on the Mendel
May 22, 2018 02:38PM
[github.com]

I found this which looks similar on my model
Re: RepRap Samuel - A variation on the Mendel
May 23, 2018 09:48AM
The file that you linked is just a pulley for the belt to ride on. If your belt is 6mm wide, you shouldn't have a problem.
Re: RepRap Samuel - A variation on the Mendel
May 23, 2018 01:49PM
Apparently there is a science to measuring these belts. I will have to grab some calipers when I am with it in the office again. I'll try to use this as a guide.

[www.sdp-si.com]
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