Sir Death, That's all well and good until your nozzle starts getting plastic all over it (as happens as soon as you start printing). Also it's no good if you start using a surface treatment on your aluminium (as most people are). I'm using a PEI sheet so there's no way possible that it would work. I've considered using a layer fan, and sensing the extra pressure in the manifold when the layerby nebbian - Delta Machines
4V is quite low for servos, I assume you're talking about R/C style servos? Most of them prefer 5V or higher.by nebbian - General
Measure really really carefully?by nebbian - Delta Machines
1.1.0-RC2. Available here: https://github.com/MarlinFirmware/Marlin/tags You need to copy the Configuration.h and Configuration_adv.h from example_configurations/delta/kossel_pro to the main folder, before tweaking to match your setup. The important parts are to measure your diagonal rods accurately, and get your steps per mm correct when doing vertical moves. Then you do the paper test andby nebbian - Delta Machines
More upgrades. Here's the latest iteration of my extruder drive assembly. What I did was as follows: 1) Take the bowden tube off the pressfit connector 2) Drill the pressfit connector out with a 4mm drill bit, careful not to mangle the pressfit jaws 3) Shave the outside of the bowden tube, the one that Sintron provided me is slightly larger than 4mm 4) Screw the pressfit connector back into tby nebbian - Delta Machines
Quotetoxuin Oh. I didn't know that. Never had a single crash on mac os. Slic3r crashes randomly for me on both my macs. Both running latest versions of MacOS and slic3r. Looks to me like a memory leak type issue.by nebbian - General
Connect your grounds together and see what happens.by nebbian - General
Quoteblurd Hi, thanks for the responses. I tried your suggestions to no avail. The picture shows how I hooked up the LCD. I tried adjusting the contrast, but I just got brighter squares. I wired the z probe switch with a (NC) open, red (NO), black (C) and on RAMPS, I hooked it up black top, red mid, bottom open. If I switch the red and black connections on the board still completely shuts downby nebbian - Delta Machines
Thanks guys. I had a good play with it tonight, and it looks like it does actually take note of the probe points when it does the G29. For some reason I'm getting better results when manually calibrating rather than using G29, but I haven't really gotten it dialled in yet. Thanks again for your assistance.by nebbian - Delta Machines
I've been printing with my Kossel Mini for a couple of months, it's working really well for me. However the calibration is completely manual at the moment. If I notice that the skirt is printing a bit thicker on one side, then I do the paper test in 4 places and adjust my endstop screws until it prints flat. This system only takes a couple of minutes to do, and is accurate enough to work well.by nebbian - Delta Machines
OK what you need to do is this: Modify this line to be 50: #define Z_RAISE_BEFORE_PROBING 50 The solution was posted here:by nebbian - Firmware - experimental, borrowed, and future
Decrease your DELTA_PROBABLE_RADIUS. That, combined with your Y_PROBE_OFFSET_FROM_EXTRUDER means that you would be probing outside the bed. Replace #define DELTA_PROBABLE_RADIUS (DELTA_PRINTABLE_RADIUS - 10) with #define DELTA_PROBABLE_RADIUS (DELTA_PRINTABLE_RADIUS - 20) That at least will get your delta probing, but you'll still have the issue of probing outside the bed like me *siby nebbian - Firmware - experimental, borrowed, and future
QuoteMrPCatt good point actually.... does anybody have a good cooling solution for our kits (and hotends) ? Most solutions I found either are made for different heatsink diameters or are to big overall costing way to much printspace on the edges. Or both And does it matter having a fan blowing to the noozle? Or do I have to make sure only have the fan hitting the object itself? It's best to havby nebbian - Delta Machines
PKM, I had this issue. Turned out that my steps per mm value was off. Calculate this exactly using the number of teeth on your pulleys, your belt pitch, degrees per step on your motors, and number of microsteps on your drivers. There are simple formulas online to help you with this. To verify, measure exactly how far a carriage moves when you ask it to go 10mm down in the Z direction. Use aby nebbian - Delta Machines
Quoteo_lampe Quotenebbian Alternatively if you're feeling brave you could disassemble the push fit connector and drill it out the same as the one on the hotend, which would allow you to push the bowden cable all the way through the hole in the extruder until it's almost touching the extruder gear and idler bearing. Pretty risky with a M5 or M6 thread. On my e3d clones heatsink it was a 10mm threby nebbian - Delta Machines
I use a paper shim and adjust things until it always reads 0.1mm wherever I test on the bed. This seems to give pretty good results. I agree, with a shim in place you shouldn't be able to get to 0 Z position. Not sure if this helps.by nebbian - General
Tumbledown, don't play with the diagonal rod length to adjust scaling. Measure it as accurately as possible, then plug that value into the config. And don't touch it again! Then change smooth rod offset until you get a flat print surface. Once these steps are done, don't touch those values again. If you are having dimensional issues then you have other problems (steps per mm, twisted toweby nebbian - Delta Machines
I'm just going by what I noticed when doing the bed calibration -- the version of marlin that I used definitely did not interpolate a path when moving between points. This resulted in a curved toolpath. There are two different ways of moving the head, one that interpolates the path, another that just moves all motors at a fixed speed to the endpoint. The bed calibration routine was using the sby nebbian - Delta Machines
Tumbledown, if this only happens while transiting then it's due to the Marlin firmware, and nothing to worry about. The reason is due to the geometry of a delta printer, and the firmware not calculating every point in space between two points. In some cases when transiting, the firmware just calculates the final point, and drives all the motors at a certain speed to get there. This means thatby nebbian - Delta Machines
QuoteTha_Reaper Exactly! I just discovered it 30 minutes later, and it turned into a bird's nest up there. What's that part that you used? Can I buy that somewhere? That part is called "Bit of aluminium tube I had lying around". I've since replaced it with a part called "1 cm offcut of PTFE tubing, exactly the same stuff as is in your bowden tube". The easiest way to do this is to press tby nebbian - Delta Machines
QuoteTha_Reaper Quotenebbian Have you adjusted the motor driver currents? You stick a jewellers screwdriver in the little trimpot, and measure the voltage between the screwdriver and earth, while slowly nudging the screwdriver back and forth. Mine is set to 0.45V. Checked mine, it was 0.3V. Had a lot of skipping so I cranked it up to 0.45v. Much less skipping, but now on a longer print my PLAby nebbian - Delta Machines
Quoteo_lampe Don't take the nozzle diameter for granted. I got 0.3 nozzles from china, which are 0.4 and vise versa... -Olaf What's a good way to test this? Also while we're on the subject, I read somewhere that you should have an extrusion width that is slightly larger than the nozzle size. I've always just used an extrusion width equal to the nozzle size. Can you confirm/deny?by nebbian - Delta Machines
QuoteSir_Death I can only achive 15mm/sec - seems much to low for me.... trying more Speed, extrudermotor jumps back - it can't push the Filament faster because it won't melt fast enough... did the volumetric Speed test - only 1.3mm³/sek - read somewhere it should be over 5mm³/sek So what are your values? I'm getting good prints at 60 mm/s, at 0.3mm and 0.1mm layer heights in PLA. 210 degreesby nebbian - Delta Machines
Cripes, no need to drop that sort of dough. Something like this would do the job: http://www.jaycar.com.au/Electromechanical-Components/Relays-%26-Accessories/Panel-Mount/Heavy-Duty-Chassis-Mount-Relays---30A/p/SY4040by nebbian - Delta Machines
Set up a fan to blow on your polyfuses, they might be getting too hot and turning off.by nebbian - Delta Machines
There's no need to use PID control for a heatbed, the old fashioned "Bang bang" control is fine. Just stick some relays in there and be done with it. I'm using a relay to control the heatbed on my printer, it works fine.by nebbian - General
I'd just move the connectors for the tower steppers around. Easier than frigging around in software imhoby nebbian - Delta Machines
I'll be interested to hear how you go, I've got a chimera clone on order. I hope it's able to be set up properly on my delta I've often thought that setups where the hotend hangs below the plane of the rod ends is not set up well (including mine!) To my mind, you want to have the centre of mass of the hotend and fan arrangement in line with the rod ends, this would mean that when you move theby nebbian - Delta Machines
Check your layer cooling fans, had a friend with this issue. The layer cooling fans were blowing air down, when the head got close to the bed the cold air would cool the nozzle so much that it triggered the runaway protection. We turned the layer cooling fans off and the problem went away.by nebbian - General