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Dear all,

I read a lot of message from the forum, but now I cannot resolved the issues alone.

I'll explain the problems encountered (sorry for my english, i'm french speaking), I have an "old version" of Rostock Max (Rambo 1.0, I think, the sticker on the board have a number starting with 10, it's the version nbr?) with aluminium pulley.

The calibration is not done but I've set the 0 on the Z axis.

On page 155 of the new Assembly guide (10th july 2013), the following G-Code will crash the head on the bed when approaching the Y axis:

G28
G0 Z5 X0 Y90 F3500

I'll try to correct the delta but no luck!

I've put the configuration and also the 2 eeprom screenshots from repetier.

I have some difficulties isn't it?

If you have some tips, I'll need it!

Thanks in advance.

The calibration is a very hard operation, can someone can provide a configuration (configuration.h, not for Marlin) for a Rostock Max (last year, with aluminum pulleys and rambo 1.0) as example.

I cannot understand why the nose crash of this sort on the heated bed!

If you have an example of config, you'll receive my gratitude (I follow some of the calibration procedure but it fails).

I'm lost !

Gwenaël

Your XY and Z max length in the EEPROM might be set too high.

Using repetier host I would send
G28
Then
G0 Z100 F1200

Then using the arrow keys jog the head down until it is almost touching the bed. Now take 378.70 (xyz max length) and subtract what repetier is reporting as Z height. This should be a good starting point.

Try bringing the head down to 50 instead of 5 (G0 Z50 X0 Y90 F3500) and bring it down the rest of the way to the bed using the controls in Repetier very slowly. You want to do the X, Y and Z towers before setting the overall Z height.

Before doing that, though, if you pulled a recent version of the firmware you'll need to change the number of pulley teeth in config.h to 15 to match your aluminum pulleys. The current version comes set for 20 tooth pulleys since that's what the machine now comes with. As to your RAMBO version, I could be wrong but I think you're probably > version 1.0 if ~378mm is anywhere close to your z height. If you were 1.0 I believe the machine would be trying to move 756mm to the bed.

Thank all for the help.

To respond to Cleveralias : as you see in the configuration.h, the nbr of teeth is set to 15.

@daftscience the command : G0 Z100 F1200 will move the about 10cm from the heated bed. But if I move manually to an axis (Y + 75, ther nooze in always in the print area but in repetier the following error message is displayed : 18:37:26.147 : Invalid delta coordinate - move ignored


For the command G0 Z50 X0 Y90 F3500 : I heard a "clap" at the end of the move. I'll record a video, It can be beter than words

Cleveralias wrote:Before doing that, though, if you pulled a recent version of the firmware you'll need to change the number of pulley teeth in config.h to 15 to match your aluminum pulleys. The current version comes set for 20 tooth pulleys since that's what the machine now comes with. As to your RAMBO version, I could be wrong but I think you're probably > version 1.0 if ~378mm is anywhere close to your z height. If you were 1.0 I believe the machine would be trying to move 756mm to the bed.

Cleveralias:
When did the teeth # change?

Gwen:
If you are using RAMBO 1.0, make sure to change your #define MICRO_STEPS to 8. Also make sure you change #define EXT0_STEPS_PER_MM from 92.4 for EZStruder to 584 for Steve's Extruder, if that's what you are using. Both of these values are in the configuration.h part of the firmware.

Micro steps : already set to 8
For the extruder, I've set the wrong value (292 instead of 584).

At this moment, due to the this, I'll verify the tension of the belt, and retry the test.

This is the video after the following GCode:

G28
G0 Z50 X0 Y90 F3500

[youtube]http://www.youtube.com/watch?v=gUqHQ1ZJ ... e=youtu.be[/youtube]

Since the boards ship with Repetier installed, if you change any of the teeth/microstep settings, YOU MUST bump the EEPROM mode number in configuration.h

If you do not you will get unpredictable movement, it's a "bug" in the current Repetier builds, it uses the EEPROM number to calculate the number of steps, but adjusts for the Delta geometry based on the defines in configuration.h. If they are not the same values you have an issue.

Gwen wrote:Thank all for the help.

To respond to Cleveralias : as you see in the configuration.h, the nbr of teeth is set to 15.

@daftscience the command : G0 Z100 F1200 will move the about 10cm from the heated bed. But if I move manually to an axis (Y + 75, ther nooze in always in the print area but in repetier the following error message is displayed : 18:37:26.147 : Invalid delta coordinate - move ignored


For the command G0 Z50 X0 Y90 F3500 : I heard a "clap" at the end of the move. I'll record a video, It can be beter than words

You are set for 105.67 steps per mm with the 15 tooth pulley - this is the correct setting for 1/16th stepping (as is the 584 you mentioned you needed to change for the extruder) but your config is set for 1/8. Try changing the fw to 16 microsteps (updating the version number as polygonhell recommended) and see what happens. For what it's worth, my RAMBO is 1.1 and the sticker begins with 10.

theverant wrote:

Cleveralias wrote:Before doing that, though, if you pulled a recent version of the firmware you'll need to change the number of pulley teeth in config.h to 15 to match your aluminum pulleys. The current version comes set for 20 tooth pulleys since that's what the machine now comes with. As to your RAMBO version, I could be wrong but I think you're probably > version 1.0 if ~378mm is anywhere close to your z height. If you were 1.0 I believe the machine would be trying to move 756mm to the bed.

Cleveralias:
When did the teeth # change?

Some time around May IIRC.

Cleveralias wrote:

Gwen wrote:Thank all for the help.

To respond to Cleveralias : as you see in the configuration.h, the nbr of teeth is set to 15.

@daftscience the command : G0 Z100 F1200 will move the about 10cm from the heated bed. But if I move manually to an axis (Y + 75, ther nooze in always in the print area but in repetier the following error message is displayed : 18:37:26.147 : Invalid delta coordinate - move ignored


For the command G0 Z50 X0 Y90 F3500 : I heard a "clap" at the end of the move. I'll record a video, It can be beter than words

You are set for 105.67 steps per mm with the 15 tooth pulley - this is the correct setting for 1/16th stepping (as is the 584 you mentioned you needed to change for the extruder) but your config is set for 1/8. Try changing the fw to 16 microsteps (updating the version number as polygonhell recommended) and see what happens. For what it's worth, my RAMBO is 1.1 and the sticker begins with 10.

Set your x,y,z steps to 53.33 and try again!