Skalarwelle!

schorschxy31

The Problem of almost all coreXY-users: the ‘shift’ caused by missed steps due to poor implementation of coreXY in Marlin so far. A friend had some similar problems last week but i didn’t thought about it till yesterday.

It seems like ‘normal’ Marlin firmware says it can compute CoreXY driven maschines like H-Bots or SchorschXY BUT causes larger problems with skewing….

left: Marlin V1 (30.04. 2013)

right: Marlin for coreXY (iquizzles thread)

It seems to me that Kamermaker also had that problem. Never thought about their system but maybe a huge H-Belt? I don’t have time for that now…

…have…

…to print…

……vertical!

I do not get git-hub jet, but i think it is a little complicate. I had to reopen a tab by accident to find a link to the files i need. I also don’t know how they call that over there – git? fork? branch? … or diff? I think it is a diff. or a div?

AND: It is not over. There seems to be a problem with the Ymin-endstop. it only checks the X and tries to get out of the Ymin, resulting in retracting (the distance) in Y+ direction. I, for now place the head at Ymin and enjoy the rest of the homing and, of course, zero-skew.

ANDAND: there is a problem with monitoring the bed-temp with Cura 13.03… not tested anything else jet.

MK7 sneaks in

schorschxy24

E3D v4

GRRF modular

MK7  (ON 20 VOLTS!) only got 190°C here… (data send by a friend)

description (older post)

each square = 10° x 10s

Starting @ 20°C

Stopped @ 240°C

E3D v4: 120sek

GRRF modular: 350sek

shure it doesn’t say anything about printing-quality, but when i look at that GRRF-curve i doubt that it makes 270°C in a non-ridiculous amount of time… and i think they might have made it for PLA-only or 24V.

For this test i just startet my RAMPS1.4 with Marlin rc3 and standard PID. I don’t know how to adjust my PID so you can see it on the Table near 240°C.

SchorschXY gets a (first) Z

You all know it is called ‘3D-Printing’. That’s why i decided to give SchorschXY another axis.

It is all moving now and all it misses is an extruder. Hotends are there….

schorschxy20

For those who have only a handful of steppers: Triggerwarning, explicit use of steppers!

I used 4 Steppers for my Z. Four times this:

schorschxy21

The idea is that the printbed is ballbeared against the side and lifted by four M6-screws. Those screws are fixed to the motors with PVC-tube. Motors are held in Place with litle blocks that keep them right in the corner. Fleecetape isolates the vibrations. I can hear’em whisteling.

when time matters

I measured the heating-time of both Hotends and the winner is our new british friend: the v4 from E3D. If you look at the table you almost feel sorry for the GRRF-modular Hotend while the v4 seems to like it hot.

schorschxy18

each square = 10° x 10s

Starting @ 20°C

Stopped @ 240°C

E3D v4: 120sek

GRRF modular: 350sek

shure it doesn’t say anything about printing-quality, but when i look at that GRRF-curve i doubt that it makes 270°C in a non-ridiculous amount of time… and i think they might have made it for PLA-only or 24V.

For this test i just startet my RAMPS1.4 with Marlin rc3 and standard PID. I don’t know how to adjust my PID so you can see it on the Table near 240°C.

Hot-Ends!

You heard about the E3D-full-metal-Hotend which has a 3Week lead time now? Here it is, side by side with the good old GRRF-Hotend. It is a bit longer (around 15mm).

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I ordered the DIY-version so i have to place the Thermistor (missing on the pic) and screw on the Heater-Cartridge (witch is the same that you can get @ fabber-parts). I will let you know about heating-Time and so on when i got Time for that. For now it is Schorsch-Time.

AND: There IS Kapton-Tape delivered with the DIY-Kit. In case you wonder where to get that wide Tape they are using on their webside to mount the thermistor, look at the backside of the heater-bag:

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