Hi, It's probably worth mentioning that Think3DPrint3D no longer sell the Mendel90 so I don't know what level of support you will get from them. nophead's sources are probably a better base to start from as he is always happy to help. Regards, Neil Darlowby neildarlow - Mendel90
Hi, I believe there was a bug in the PID code which was fixed. The initial overshoot is much reduced particularly if you use the PID autotune on the extruder and bed. Regards, Neil Darlowby neildarlow - Mendel90
Hi All, I have added a new branch to my Github Marlin Repository named Mendel90_RC. This branch has originated from Marlin-1.1.0-RC7 and I intend to use it to follow future RC versions with tagged stable releases as they occur. There are a few items that you should be aware of in setting-up for, and using, this branch: Arduino IDE 1.6.0 or later is required The Melzi support files structure haby neildarlow - Mendel90
That looks nice. The solid top-layer is somewhat sparse. Is it difficult to get complete infill with flexible materials? Talking of success. Now that I have Marlin 1.1.0-RC7 operational I can answer your earlier question about what is better in it: 1) It is easier (and saner) to configure. 2) The heated bed now has residency parameters like the extruder. Useful for laggy beds with adhesion-assiby neildarlow - Mendel90
Quotenophead >Still enjoying the quiet life? Yes thanks. Playing with different filaments. Filaflex yesterday, polypropylene today. Nice. Have you lined the Wade's block with PTFE tubing? I've had a go at that but it's a real challenge to accurately cut the tube for a close-fit to the hobbed bolt and idler. Regards, Neil Darlowby neildarlow - Mendel90
Hi Chris, Still enjoying the quiet life? The Marlin 1.1.x series is the current focus of development. It's had a lot of bug-fixing and clean-up effort but requires a newer version of Arduino than our previous Marlin versions did. I'm OK with that because most users would prefer to use a newer Arduino than 1.0.x for their other projects and I want to use the version provided by my distributionby neildarlow - Mendel90
Hi All, Having rested from 3D Printing for a few months I am currently making time to produce a working Marlin 1.1.0-RC7 for the Mendel90. I have converted the Board Support to the newer (Arduino 1.5.3 and later) format and determined that this version of Marlin requires at least Arduino 1.6.0 to build. A very basic configuration has resulted in a compile without any errors. Now I just need toby neildarlow - Mendel90
Hi everyone, The time has finally come for me to move on from 3D Printing. I was thinking seriously of producing some hardware of my own but having seen the release of decent machines like the Prusa i3 Mk2 and the BCN3D Sigma I decided that the marketplace has enough to offer. I will leave my firmware up on Github but won't be developing it any further. I have left the facebook and Google+ groby neildarlow - Mendel90
Hi, It could possibly be supported in the example configuration files directory. It really depends on what future interest there is for the Mendel90. I am happy with my Mendel90 using the firmware at its present level. Many of the recent changes to Marlin involve code re-factoring and newer features which the Mendel90 does not support without modification. The bed levelling code is known to woby neildarlow - Mendel90
Hi, Is this wise? The Mendel90 is an excellent machine and I understand your liking of it but it is probably not a wise choice for this scenario for the following reasons: You no longer have a Mendel90 to use as a reference in assisting the school. Mendel90 kits are no longer in production so the school would have to source parts for new machines. While you may be willing to assist the school nby neildarlow - Mendel90
Hi, You can work Aluminium Composite Panel (ACP, Dibond) by hand if you have the time and take care. As one of my old mentors would say "Cut wide and fettle!". If you buy a large enough sheet you can take the critical edges (the ones that must be straight) from the outside edges of the material. On the Mendel90 this is achievable because only the rear struts require two straight edges so use thby neildarlow - Mendel90
Hi Alan, I am currently adjusting the Wades Block so that I can insert a PTFE liner leading to and from the Hobbed Bolt and Idler Bearing. I have some 3.2mm ID/6.2mm OD PTFE tubing for this purpose. As far as actually printing with flexible material, I have not tried that yet. I will print a few modified blocks (I always like to have spares) and then put one in place and give printing a go. I aby neildarlow - Mendel90
Hi, The Melzi is just one of many boards supported by Marlin. It is just a case of providing the relevant numerical define for what Marlin calls the Motherboard. Regards, Neil Darlowby neildarlow - Mendel90
Hi, When Marlin-1.1.0 is released I will produce another branch for the Mendel90. The problem in doing this is that Arduino-1.0.x will not build the Marlin-1.0.x and later code but Marlin-1.1.0 will require Arduino-1.6.8 or later. This means that I will have to transition to a newer Arduino and support of the old fork will likely cease. I am still using my Mendel90 but much of my current efforby neildarlow - Mendel90
My only concern about extremely slow speeds and high extrusion temperature is that you may then start to see the effects of ooze.by neildarlow - Mendel90
@danielis: There is a lot of myth in the 3D printing community relating to many things that should, and should not, be done. There is much advice that is not appropriate to modern materials or hardware and you need to make determinations for yourself. Yes, using a fan with ABS can be a potential cause of de-lamination but if you are in a situation where there is excess heat in the deposition ofby neildarlow - Mendel90
Yes, I do not run the fan at anything less than 100%.by neildarlow - Mendel90
Why is the fan mounting not complete? I only see two mounting holes at the bottom and it is open at the top. How can that make an airtight chamber? I think I could print that object at 220C with a minimum layer time of 5 seconds and minimum print speed of 10mm/s and I would have the fan enabled for layer times of 5 seconds or less (even for ABS). The Reprappertech ABS I use can cope with these cby neildarlow - Mendel90
@demerits: My nozzle is a standard Mendel90 kit 0.4mm one. I print 0.4mm layers with it often in both ABS and PLA. Regards, Neil Darlowby neildarlow - Mendel90
@demetris: Most parts for the Mendel90 kit are sliced at 0.4mm layer height and 0.6mm line width. Some parts with fine detail are sliced at 0.35mm layer height and 0.525mm line width. nophead generally follows the 1.5 W/H rule. For the 0.4mm layer height parts you can, obviously, slice at 0.2mm but the print time will be longer. I recently printed an X-carriage for GT2 belts using 0.4mm layer hby neildarlow - Mendel90
Hi, This think3dprint3d Github repository contains a Mendel90 design that supports multiple extruders. They used to offer it as a kit but I think it is now abandoned. You might be able to pull something useful from there. Regards, Neil Darlowby neildarlow - Mendel90
My guess is that you set the pin under the wrong motherboard stanza. You need to follow the motherboard definition from Configuration.h into pins.h and locate which one to change.by neildarlow - Mendel90
If Skeinforge fails to output G-Code (it just appears to hang) this is often caused by the Comb setting. Try disabling it in the active profile and slice again.by neildarlow - Mendel90
It is not obvious but the auto bed levelling feature uses the port assigned to Z_MIN_PIN in pins.h. For a standard Mendel90, which homes upwards, this will not be already defined. You will need to assign the required pin.by neildarlow - Mendel90
If you get the Melzi circuit schematic from the reprap.org wiki you can determine which pin to use. The port associated with P27 has a LED attached to it so that one is not available. If you have the chassis fan fitted you may have used the port associated with P28 for that. There are two more ports available if you are not using a Panelolu2 or other I2C-interfaced LCD panel. You will need to dby neildarlow - Mendel90
You must use Skeinforge to slice the X-ends. Slic3r does not produce the single-layer membrane as you have discovered.by neildarlow - Mendel90
Hi, I do not allow the hot-end to hold at temperature for long before printing. For PLA, printed at 185C and bed temperature of 70C, the following gets the bed to temperature a little before the hotend: M190 S40 ; pre-heat bed M104 S185 ; set extruder temp M190 S70 ; set bed temp & wait M109 S185 ; wait for extruder temp I am careful about not abusing my hotend and have not suffered a singleby neildarlow - Mendel90
Hi, Does the carriage move freely under manual movement? I am trying to distinguish between motor and mechanics here. Mechanically, I would check for the bearings binding or the Y bars being out of alignment. Moving the carriage to each extreme and loosening then re-tigthening the associated clamps should fix that. Binding bearings would make a noise under movement. Regards, Neil Darlowby neildarlow - Mendel90
Hi, Are you using a version of Arduino after 1.0.6? Newer versions have problems with this legacy code because they use newer avr-gcc than the code was written for. Another possibility is an edit to a configuration file is syntactically incorrect and it gets caught later in the compile. Regards, Neil Darlowby neildarlow - Mendel90
See here. Regards, Neil Darlowby neildarlow - Mendel90