Thanks Thanks:  16
Likes Likes:  13
Dislikes Dislikes:  0
Page 5 of 5 FirstFirst ... 345
Results 41 to 49 of 49
  1. #41
    3D Printer God(dess)
    Join Date
    Nov 2016
    Posts
    1,411
    Post Thanks / Like
    Aha... yes... I've had EE's tell me they don't want to make a special map for avoiding things, so I do understand.

    Perhaps this is why 3DS developers just ditched the soft stop detection to incorporate the alternative "revolutionary" purge function?

    I always considered "disabling" soft stop detection is valid for specific functions. But that has to be dealt with in code as well.

  2. #42
    Regular 3D Printer
    Join Date
    Sep 2017
    Posts
    38
    Post Thanks / Like
    @Kiza

    [Quote]
    By the way, does anybody know, what are the settings for movement/extrusion? Steps per mm in Cube 3 firmware.
    [Quote]

    The Cube firmware uses 8 as the diameter of the "gear" when in actuality the OD is 9.5 with
    a tooth depth of .45 makes the ID 8.6. The circumference varies from 29.83 for the 9.5 OD
    to 27.04 for the ID 8.6. Therefore, the extruder INPUT length is 29.83-27.04mm per revolution regardless
    of the number of steps. Neither of these would work very well because they are the extremes.

    BFB Gcode M108 Sxx.x specifies the number of RPMsx10 of the extruder. So, one parameter is in TIME, RPM
    and the other is DISTANCE, mm/step. Things can get confusing.

    As an example M108 S29 = 2.9 RPMs.
    Using a median circumference of 28.435mm*2.9RPM = 82.4615mm/minute or 1.3744mm/sec.

    Using the median circumference of 28.435mm per revolution/200 steps per rev = 0.142175mm per step.
    Or, expressed as steps/mm = 7.03358537014243 steps. Very unyielding.

    Specifying RPM instead step/mm results in a fixed length of filament per minute regardless of the number of steps.

    BTW, beautiful work on ur Mods. You continue to impress me !!!

    G70

  3. Thanks Kiza thanked for this post
  4. #43
    3D Printer Noob
    Join Date
    Feb 2017
    Posts
    23
    Post Thanks / Like
    [QUOTE=JackMeoff;43971]@Kiza

    [Quote]
    By the way, does anybody know, what are the settings for movement/extrusion? Steps per mm in Cube 3 firmware.

    The Cube firmware uses 8 as the diameter of the "gear" when in actuality the OD is 9.5 with
    a tooth depth of .45 makes the ID 8.6. The circumference varies from 29.83 for the 9.5 OD
    to 27.04 for the ID 8.6. Therefore, the extruder INPUT length is 29.83-27.04mm per revolution regardless
    of the number of steps. Neither of these would work very well because they are the extremes.

    BFB Gcode M108 Sxx.x specifies the number of RPMsx10 of the extruder. So, one parameter is in TIME, RPM
    and the other is DISTANCE, mm/step. Things can get confusing.

    As an example M108 S29 = 2.9 RPMs.
    Using a median circumference of 28.435mm*2.9RPM = 82.4615mm/minute or 1.3744mm/sec.

    Using the median circumference of 28.435mm per revolution/200 steps per rev = 0.142175mm per step.
    Or, expressed as steps/mm = 7.03358537014243 steps. Very unyielding.

    Specifying RPM instead step/mm results in a fixed length of filament per minute regardless of the number of steps.

    BTW, beautiful work on ur Mods. You continue to impress me !!!

    G70
    Thank you so much! I will try to use this parameters for the extrusion. Do you know the parameters for the XYZ movement as well? Number of steps per mm?
    I can measure it, but I wonder what exactly the cube firmware parameters are.

    Stopped working on the project for some time now, lot's of work to do. Will continue as soon as I have more free time, really excited to finally print something
    Few more days

  5. #44
    3D Printer God(dess)
    Join Date
    Nov 2016
    Posts
    1,411
    Post Thanks / Like
    Confirming feed-length should be simple. Since the driver "cogs", you should be able to shave the filament at the top of the driver and turn the gear exactly 1 turn; then measure the protruding length.

    - - - - - - - - - -

    1st measurement:

    PLA new: 27.72mm/turn

    27.72/pi=8.8235500450146774150269158413722 (Dia 8.824mm) effective driver diameter

    Since the F/W is simply providing a given RPM per the BFB input, it is ignoring over-torque conditions where less filament is actually spooled out.
    Last edited by TommyDee; 04-06-2018 at 01:40 AM.

  6. #45
    3D Printer Noob
    Join Date
    Feb 2017
    Posts
    23
    Post Thanks / Like
    Quote Originally Posted by TommyDee View Post
    Confirming feed-length should be simple. Since the driver "cogs", you should be able to shave the filament at the top of the driver and turn the gear exactly 1 turn; then measure the protruding length.

    - - - - - - - - - -

    1st measurement:

    PLA new: 27.72mm/turn

    27.72/pi=8.8235500450146774150269158413722 (Dia 8.824mm) effective driver diameter

    Since the F/W is simply providing a given RPM per the BFB input, it is ignoring over-torque conditions where less filament is actually spooled out.
    How about XYZ movement?

  7. #46
    3D Printer God(dess)
    Join Date
    Nov 2016
    Posts
    1,411
    Post Thanks / Like
    XYZ will be based on the belt/gear combo.
    I hadn't looked into that yet.
    Basically it is the OD of the gear * pi.
    Most of these are metric so the measurement should be a nice round millimeter value.

  8. #47
    Regular 3D Printer
    Join Date
    Sep 2017
    Posts
    38
    Post Thanks / Like
    @Kiza
    Quote Originally Posted by Kiza View Post
    How about XYZ movement?
    Check ur gmail...

    G70

  9. Thanks Kiza thanked for this post
  10. #48
    3D Printer Noob
    Join Date
    Nov 2017
    Posts
    1
    Post Thanks / Like
    Hey Kiza would you mind posting the limit switch mounts?
    I have mine wired but not mounted.

  11. #49
    3D Printer Noob
    Join Date
    Feb 2017
    Posts
    23
    Post Thanks / Like
    Quote Originally Posted by mrsolis93 View Post
    Hey Kiza would you mind posting the limit switch mounts?
    I have mine wired but not mounted.
    Here is the thingie:
    https://www.thingiverse.com/thing:2900288

    It's in the process of publishing, my first upload, so it will be available in 24 hours.

    - - - - - - - - - -

    Ok, the thingie is live.

  12. Thanks mrsolis93 thanked for this post
 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •