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http://reprap.org/wiki/Smartrap_mini A new printer near first release, still in development ... Its main goals are ease/speed of assembly, low cost and modularity (being an easy basement for new designs).
Re: Smartcore build log and pre-build questions - 8 years ago
Glad you got it to work for you. Hope it saved some time and others can benefit from the version you have made.by smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
Stls aren't parametric but you can go to Onshape and search as per my post dated 18 Sep 15. Then you can copy and edit yourself with an onshape account (free and easy to get used to). You could also import stl into sketchup and edit there but I left sketchup for onshape and haven't been back once!by smerrett79 - Smart_Rap
Re: Using lead screws for the Z axis on the Smartrap Alu - 8 years ago
Although my threaded rod was rough and my lead screw is smooth, I think adding the second threaded rod on z axis made the biggest difference to my print quality - really reduced the ripples due to bed lateral vibration during fast direction changes (infill). See Mandrav's build or my build log for pictures. Cost of a lead screw with nut is under £10 I think. You could buy three for £15 when I lasby smerrett79 - Smart_Rap
Re: Tinpau's SmartRap - A first 3d printer build - 8 years ago
Can't give you the perfect settings but richrap.blogspot.co.uk has a great extruder calibration guide in his Slic3r is Nicer - Part 3 post.by smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware 
- 8 years ago
Thank you for your help. I will try those settings. I use 2mm pitch lead screws in the z axis so travelling to Z_MAX_POS each time I level the bed/print would take a very long time as a proportion of the print. I don't understand why it can't use a software z_max_endstop (at least I can't get it to work!).by smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Thanks - will give it a shot and see!by smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Err, don't know! Would I find out by looking the in the RH EEPROM settings menu? I have to reflash the Arduino MEGA with Repetier FW if that's the case as I went back to Marlin until I could sort this out. I have tried this with EEPROM mode set to 0 and there's been no noticeable difference. I use these two relevant gcodes in my start up for a print G28; home all axes G29; auto tram tilt compensby smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Thanks - bear in mind I was changing things all over the place to see what might work, so it might look a bit messed up. Here it is: /* This file is part of Repetier-Firmware. Repetier-Firmware is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the Licenseby smerrett79 - Smart_Rap
Fan duct for V1.2 - 8 years ago
I just uploaded this - please make whatever use you can out of it. http://www.thingiverse.com/thing:1085855 Simonby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
@CeledaBCN: 58mm. Sorry that took so long. I had to go digging around the rubbish bag. Some Benchy pics. Remember this is without fan (except frantic blowing by me for bridging the cabin roof!) and with periodic +/-3*C hotend changes. Not perfect but very happy for early results. The black bits are black ABS which is still coming out of the hotend.by smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
Just a quick update - been having problems with the (too low) filament flow rate for the Volcano and I have finally given up and reluctantly switched back to the Lite6. It's probably a slicer issue. However, the first couple of Lite6 prints look good, even without part cooling. Still working out how best to mount a part cooling fan. Will show a picture of Benchy when I can remember to take onby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
@CeledaBcn thingiverseby smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Update I have asked Roland about this on the Repetier Firmware forum and he says he's got a z probe sensor on order for his cartesian printer. Although it's not an inductive sensor he says it will require the nozzle to move below the point of Z_MIN_POS so I'm hopeful that we may get a version of Repetier Firmware which works for smartcore soon.by smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
Coming along nicely with the E3D Volcano and 0.6mm nozzle fitted. The print bed is really solid laterally and I'm hopeful that will turn into really clean geometry prints when I start to ramp the speed up. Just a note for the wider nozzle - don't try and slice a calibration shape with wall thickness less than the nozzle hole diameter - it confuses both cura and slic3r!by smerrett79 - Smart_Rap
Re: SmartrapCore HK13 (8mm rods - 13mm square Alu tubes) - 8 years ago
Good work guys! I have to say I'm enjoying the switch from Sketchup to Onshapeby smerrett79 - Smart_Rap
Re: Another newbie's Smarcore build - 8 years ago
@MichaelBrock Hooray! Congratulations. If you are looking to calibrate your extruder (which I highly recommend as an almost essential activity) then you will want to look to adjust the last value in the brackets of this line of configuration.h in your Marlin folder: #define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,1600,145} RichRap gives a really good guide to calibrating extruder here: RichRap Slby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
@CeledaBcn I shared the Z parts in a previous post - are they working for you? Quotesmerrett79 Here are the .stl files for the Z axis parts If you cut your z axis smooth rods longer and make your box/frame taller you could definitely keep your threaded rod at 300mm. My box was sized using the openjscad 1.0 code for 300mm rods in every axis (XYZ) which you need to check by changing the print voby smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Thank you for helping - I have read that. I think that the problem is that repetier firmware can't differentiate between the inductive sensor in endstop mode and probe mode, like Marlin can. Going to keep trying as, like the DRV8825s I think it would be an upgrade for smartcore. Would be good to crack it so people have a choice of firmware for smartcore.by smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
@ Zlob are you using repetier firmware? If so are you using auto bed levelling? If yes, please could you post your configuration.h file? Thanksby smerrett79 - Smart_Rap
Re: Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Thanks for the suggestion but I'm definitely within Z_MAX_POS - Z_MIN_POS limits.by smerrett79 - Smart_Rap
Induction Z axis probe/z_min_endstop in Repetier Firmware - 8 years ago
Guys, a plea for help: I am really stuck on getting Repetier Firmware to work with the inductive sensor. Does anyone else use Repetier Firmware with their smartcore or any other cartesian printer, an inductive sensor and RAMPS 1.4? I just can't get the nozzle to go close to the print bed using manual z homing, G28 or G32 (either S0, S1 or S2). Help!by smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
Update: Basic comparisons - DRV8825s vs A4988s & Repetier FW vs Marlin So here's the first experiment: run three layers of a print (without filament or even a hotend attached to the print head of my new Smartcore) excluding the first layer (slow compared to normal layers). Use a sound meter app on phone placed on print bed to record a noise dB level. Of course this is poor technique and instby smerrett79 - Smart_Rap
Re: Another newbie's Smarcore build - 8 years ago
I love this forum! People just helping each other out - it's a great example of the best of human nature.by smerrett79 - Smart_Rap
Re: Another newbie's Smarcore build - 8 years ago
I'm just going through an experiment with DRV8825s. Been getting some unpredictable results - strange movement the first time I give a manual command on each axis. Using z screws so wouldn't notice a fall to the bottom. Tried repetier firmware too instead of marlin but not really got to grips with it yet. Can't get quieter than the A4988s yet.by smerrett79 - Smart_Rap
Re: Tinpau's SmartRap - A first 3d printer build - 8 years ago
I love this extruder - better than the smartcore one linkby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
Update: Initial look (or listen) with DRV8825s The DRV8825s arrived today and I installed them on my X and Y motors on the RAMPS 1.4. After adjusting the trim pot VRefs down to about 0.4V (from 1.6V - thanks for the warning!) and doubling the steps per mm in configuration.h (+uploading it) I tested the movement out. I haven't got the hotend wires connected yet so couldn't run a test print (as faby smerrett79 - Smart_Rap
Re: Djinn5150's SmartRap Core Build - 8 years ago
Quotedjinn5150 UPDATE: Ok I have updated to the latest version of marlin, enabled firmware retract and am using volumetric extrusion now, next will be filament diameter sensors. I LOVE This version of marlin its much improved. FWRETRACT should be enabled by default IMO, the ablilty to adjust retract distance and speed on the fly as needed for differennt areas of a print is amazing. What do weby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
@jjazzyj Thanks - they all look clean before you put the cables in! I have now started reading about people finding DRV8825s noisier, after originally hearing that they are quieter than A4988s. Oh well, they aren't expensive and it will be nice to find out for myself. The noise of the 3d printer is one thing for the person in the room operating it but my wife is a very light sleeper so printing aby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
Here are some photos of my V1.2 build in progress One side of the double z axis, mounted underneath the y rod: The other side Z screw - smooth rods not yet added so you can see the oilless bushings sitting very nicely: The printer head mount/block. I have noticed that when you change the LM bearing outer diameter (to 10.2mm in the case of these bushings) it also adjusts the total depth (as opby smerrett79 - Smart_Rap
Re: Smartcore build log and pre-build questions - 8 years ago
I'm reasonably into the build of my second smartcore. The aim is to make it quieter, with three main features to help achieve this: 1. Cutouts in the box sides 2. Drv8825 stepper drivers (on order) 3. Oilless bushings instead of LM8UU There are a couple of other improvements that don't target the noise reduction: 1. Double z screw, mounted on the sides of the printer, under the Y axis rods.by smerrett79 - Smart_Rap