Marlin response too early [attachment 56382 2015-06-12-18.39.50.gif] *Moved from General* The issue I am experiencing is that Octoprint sends Gcodes to RAMPS(Marlin) and RAMPS responses with ok, however, before it actually having moved its motor to the position. So what actually happens is only few of the Gcode sent by Octoprint being actualized to the machine. Although I made an STL file with star shape, it makes some random shape or even completely ignores XY movement and only raise extruder head every 2 seconds which is insane. The estimated print time is 3hours according to CURA, but RAMPS, which experiences almost instantenous response from RAMPS, estimates its finish time to 10 minutes! Here is the terminal log from Octoprint : Send: N6725 G0 F600 X205.675 Y141.513*78 Recv: ok Send: N6726 G1 F1200 X207.931 Y139.258 E124.31224*57 Recv: ok Send: N6727 G0 F600 X208.769 Y139.833*77 Recv: ok Send: N6728 G1 F1200 X207.089 Y141.513 E124.31378*50 Recv: ok Send: N6729 G0 F600 X208.503 Y141.513*77 Recv: ok Send: N6730 G1 F1200 X210.027 Y140.696 E124.31480*54 Recv: ok Send: N6731 G1 X209.918 Y141.513 E124.31533*89 it would have been much more descriptive if I could configure octoprint to print out timestamps, but I can tell you that this much log happened in less than 2 seconds. Our printer in fact isn't conventional - we are extruding chocolate out of cylinder, so we have some few irregularities on CURA settings. Since we are extruding molten chocolate out of cylinder, we set filament diameter to 42mm and layer thickness to 1mm (both causing warning message), although I don't really think this is the source of error. Did anyone experience same problem as me when using octoprint + marlin? I would appreciate it if you could share your solution. I am also attaching my configuration.h Thanks! https://reprap.org/forum/read.php?146,520740,520740#msg-520740 Sat, 18 Apr 2026 16:28:43 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?146,520740,523091#msg-523091 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,523091#msg-523091
@frank
Now I got it, you were talking about 6.6mm / step...I caculated, my extruder would produce a track of ~19mm per 1mm filament (1.75/ 0.4 nozzle ), so I thought 6.6mm is OK 8-)]]> o_lampe Firmware - mainstream and related support Thu, 18 Jun 2015 06:15:14 -0400 https://reprap.org/forum/read.php?146,520740,523034#msg-523034 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,523034#msg-523034
the software endstop caused the problem. whenever the movement was set to out of bounds, it completely ignored the movement.

maybe printing warning message rather than just sending recv: ok would be a better.

Thanks for your support]]> totorovirus Firmware - mainstream and related support Thu, 18 Jun 2015 03:40:32 -0400 https://reprap.org/forum/read.php?146,520740,522364#msg-522364 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,522364#msg-522364 frankvdh Firmware - mainstream and related support Tue, 16 Jun 2015 15:15:19 -0400 https://reprap.org/forum/read.php?146,520740,522258#msg-522258 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,522258#msg-522258
Quote
frankvdh
Doh! You're right, Olaf.
Correctly,
1 extruder step gives pi*21*21/266.67 = 5.19 cubic mm of chocolate = 6.6mm of extruded chocolate

Which still seems an order of magnitude or two out.

Looks better! :D
But could you please draw a mental picture how a steppermotor would directly drive such a syringe/paste extruder?

There has to be an ( unknown for us ) gear-ratio between stepper and syringe, right? :)

@totorovirus Does the problem still exist?]]> o_lampe Firmware - mainstream and related support Tue, 16 Jun 2015 11:16:57 -0400 https://reprap.org/forum/read.php?146,520740,521887#msg-521887 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521887#msg-521887 Correctly,
1 extruder step gives pi*21*21/266.67 = 5.19 cubic mm of chocolate = 6.6mm of extruded chocolate

Which still seems an order of magnitude or two out.]]> frankvdh Firmware - mainstream and related support Mon, 15 Jun 2015 15:28:18 -0400 https://reprap.org/forum/read.php?146,520740,521650#msg-521650 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521650#msg-521650
Quote
frankvdh
So 1 extruder step gives pi*42*42/266.67 = 20.8 cubic mm of chocolate = 6.6mm of extruded chocolate

It is a geared stepper for sure. Paste extrusion often use a leadscrew design.

Did you mix up radius and diameter?
"Pi/4 D²" would be right :D
-Olaf]]> o_lampe Firmware - mainstream and related support Mon, 15 Jun 2015 03:02:09 -0400 https://reprap.org/forum/read.php?146,520740,521593#msg-521593 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521593#msg-521593
From Configuration.h
#define DEFAULT_AXIS_STEPS_PER_UNIT {100,100,1600,266.67} // default steps per unit for Ultimaker

So 1 extruder step gives pi*42*42/266.67 = 20.8 cubic mm of chocolate = 6.6mm of extruded chocolate

This seems like an order of magnitude (or two) out.]]> frankvdh Firmware - mainstream and related support Sun, 14 Jun 2015 20:12:23 -0400 https://reprap.org/forum/read.php?146,520740,521181#msg-521181 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521181#msg-521181
- Tim]]> tadawson Firmware - mainstream and related support Sat, 13 Jun 2015 12:23:34 -0400 https://reprap.org/forum/read.php?146,520740,521048#msg-521048 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521048#msg-521048 Frans@France Firmware - mainstream and related support Sat, 13 Jun 2015 05:16:29 -0400 https://reprap.org/forum/read.php?146,520740,521004#msg-521004 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521004#msg-521004
Quote
dc42

Do you see the same problem when you use e.g. Pronterface to print the file, instead of Octoprint?

I'll try it with Pronterface though I don't really think the driver caused the problem.]]> totorovirus Firmware - mainstream and related support Sat, 13 Jun 2015 00:51:36 -0400 https://reprap.org/forum/read.php?146,520740,521003#msg-521003 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,521003#msg-521003
Here is the nozzle and diameter setting in CURA.]]> totorovirus Firmware - mainstream and related support Sat, 13 Jun 2015 00:49:37 -0400 https://reprap.org/forum/read.php?146,520740,520775#msg-520775 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,520775#msg-520775 Filament dia is more important in relation to extruder-steps, but you seem to have a problem with x/y movement and it´s calculated based on nozzle dia.
-Olaf]]> o_lampe Firmware - mainstream and related support Fri, 12 Jun 2015 11:52:59 -0400 https://reprap.org/forum/read.php?146,520740,520757#msg-520757 Re: Marlin response too early https://reprap.org/forum/read.php?146,520740,520757#msg-520757
Do you see the same problem when you use e.g. Pronterface to print the file, instead of Octoprint?]]> dc42 Firmware - mainstream and related support Fri, 12 Jun 2015 11:21:04 -0400 https://reprap.org/forum/read.php?146,520740,520740#msg-520740 Marlin response too early https://reprap.org/forum/read.php?146,520740,520740#msg-520740
*Moved from General*

The issue I am experiencing is that Octoprint sends Gcodes to RAMPS(Marlin) and RAMPS responses with ok, however, before it actually having moved its motor to the position.
So what actually happens is only few of the Gcode sent by Octoprint being actualized to the machine. Although I made an STL file with star shape, it makes some random shape or even completely ignores XY movement and only raise extruder head every 2 seconds which is insane. The estimated print time is 3hours according to CURA, but RAMPS, which experiences almost instantenous response from RAMPS, estimates its finish time to 10 minutes!

Here is the terminal log from Octoprint :

Send: N6725 G0 F600 X205.675 Y141.513*78
Recv: ok
Send: N6726 G1 F1200 X207.931 Y139.258 E124.31224*57
Recv: ok
Send: N6727 G0 F600 X208.769 Y139.833*77
Recv: ok
Send: N6728 G1 F1200 X207.089 Y141.513 E124.31378*50
Recv: ok
Send: N6729 G0 F600 X208.503 Y141.513*77
Recv: ok
Send: N6730 G1 F1200 X210.027 Y140.696 E124.31480*54
Recv: ok
Send: N6731 G1 X209.918 Y141.513 E124.31533*89

it would have been much more descriptive if I could configure octoprint to print out timestamps, but I can tell you that this much log happened in less than 2 seconds.

Our printer in fact isn't conventional - we are extruding chocolate out of cylinder, so we have some few irregularities on CURA settings. Since we are extruding molten chocolate out of cylinder, we set filament diameter to 42mm and layer thickness to 1mm (both causing warning message), although I don't really think this is the source of error.

Did anyone experience same problem as me when using octoprint + marlin? I would appreciate it if you could share your solution. I am also attaching my configuration.h

Thanks!]]> totorovirus Firmware - mainstream and related support Fri, 12 Jun 2015 10:57:18 -0400