Steps per mm

[rebekah_harper 60]

Hi all,

 

could someone help me.  The steps per mm given by bond tech aren’t right.  Major under extrusion. 

 

What is the best way to perform a move material by a fixed amount under control. 

 

I have used used the developer access although I struggle to actually get it to do something when I want it to. 

 

I lost my original value for E steps. ?

[yellowshark 153]

Hi this may not be the best answer for you, I do not know what bond tech is, but this is how I do it. Load Repetier Host software (free), onto a laptop. Attach your laptop to your printer by USB. You will need to do a bit of printer setup in Repetier but is should not be difficult and most of the settings will be in your printer definition in you slicer. Load the STL file, on your laptop, into Repetier and use the Repetier GUI to move the material a measured amount.

 

Once fixed think about using the wonderful Repetier to control your printer on an ongoing basis

[CarloK 203]

@rebekah_harper you mention 'developer access', so you are using an UM3 or S5 machine. Then yellowshark's suggestion for using a program with USB connection won't work.

 

What machine type do you have?

Which Bond Tech extruder model are you using?

 

For the UM3/S5:

- Enable developer mode

- Make an SSH connection and login with user name 'ultimaker' and password 'ultimaker'

- 'sendgcode T0' (or T1)  this will select the left or right nozzle

- 'sendgcode M302 S0' disables the cold extrusion prevention, so you can move filament even when cold.

- 'sendgcode G0 E10' will move the filament 10mm.

[rebekah_harper 60]

Hiya,

 

yeah just realised i should have know better. 

I have a UM3

 

thanks for the reply, I will apply those commands.

[rebekah_harper 60]

hiya,

 

tried to get somewhere with it but can't get any form of Gcode to work.  I tried to get to python 3 command util but can't get there either.

 

all say either it doesn't recognise the command or there is no file or directory ?

 

[tinkergnome 927]

If you're logged in as "ultimaker" you are already in the command util (there's a "(Cmd)" prompt, correct?)  - and you can just type the "sendgcode..." commands.

 

The instructions from @CarloK are complete:

 

On 10/26/2018 at 11:10 PM, CarloK said:

For the UM3/S5:

- Enable developer mode

- Make an SSH connection and login with user name 'ultimaker' and password 'ultimaker'

- 'sendgcode T0' (or T1)  this will select the left or right nozzle

- 'sendgcode M302 S0' disables the cold extrusion prevention, so you can move filament even when cold.

- 'sendgcode G0 E10' will move the filament 10mm.

 

[rebekah_harper 60]

Nope, no CMD prompt.

[CarloK 203]

With the info I have right now I can't explain the missing CMD prompt.

When you connect over SSH and login with the ultimaker / ultimaker account, then you should be directed to the python command utility. Only in the first UM3 releases this was different, I think it was there since v3.4.

 

What is your UM3 firmware version?

[rebekah_harper 60]

Hiya,

 

its the the latest version.

 

managed to figure it out.

 

once I logged in I had to type: cd /usr/share/ plus the rest which escapes me. Once I did this I then typed in python3 commands_util.py 

this gave me the CMD prompt.  However I have to do this after every time I sendgcode. For some reason I have to turn off and on the printer then log in the send the GCode for it to move. Once it moves it won’t respond to any GCode command, so I have to turn off and on again followed by logging in. 

I don’t get it. ?  I type the exact same thing and it doesn’t respond. 

But I managed to dial in the step/mm for the bond tech. Which was 513 ish. Managed to check it and he presto. 

[CarloK 203]

Something is broken on your machine.

Did you modify the um3.json file for the new steps/mm setting? If yes, then I suspect you made a typo. Accidentally deleting a comma or something like that can corrupt the file.

 

Easiest solution: install the firmware again (from network download or a USB stick) and then apply your new steps/mm setting to the um3.json

[knutselsmurf 1]

If you need some handy tool for the X,Y,Z and E-stepper calibration, check this: https://www.thingiverse.com/thing:3706923

 

;-) Arthur