Lowrider 2 with ramps controller

New Home Forum LowRider Advice – LowRider Lowrider 2 with ramps controller

This topic contains 7 replies, has 3 voices, and was last updated by  Jeffeb3 1 month ago.

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  • #110490

    Serdar
    Participant

    Thanks very much for huge and useful information to everybody here!

    I’m a retired mechanical engineer from Istanbul, Turkey and planning to build a “portable cnc” to use even off grid places for my hobbies. Lowrider 2 CNC looks perfect for that, thanks for your efforts and studies for that Ryan!

    BTW, making a CNC equipment is new for me and learning basics about that.

    I have a question about electronics:

    Planning to use Ramps 1.4+ Arduino Mega 2560 + Marlin configuration.

     

    As I understand there are two possibility for step motors:

    1. Use three DRV8825 and serial cables for Y and Z axis
    2. Five DRV8825 and dedicate them one by one to 5 nema 17 step motors

    What happens to firmware for these possibilities? Should we use different firmwares for these options or how firmware “knows” that how did we use drivers??

     

    #110494

    Jeffeb3
    Participant

    The second setup is called “dual endstop” and there isn’t preconfigured firmware for the low rider for it. If you wire your motors in serial (which you should), you’ll get plenty of torque for the low rider.

    1 user thanked author for this post.
    #110526

    Serdar
    Participant

    As I understand:

    for 3 drivers and serial connected step motors i should use this firmware (recommended) :

    MPCNC_Ramps_T8_16T_LCD_32step

    for 5 drivers i should use this:

    MPCNC_Ramps_T8_16T_LCD_32step_DualEndstop

    right?

    First option is much better because you can use other outputs for others like extruder etc…

     

     

     

     

    #110529

    Barry
    Participant

    As I understand:

    for 3 drivers and serial connected step motors i should use this firmware (recommended) :

    MPCNC_Ramps_T8_16T_LCD_32step

    for 5 drivers i should use this:

    MPCNC_Ramps_T8_16T_LCD_32step_DualEndstop

    right?

    First option is much better because you can use other outputs for others like extruder etc…

    Correct, but the lowrider used dual Z and a single X, that’s why the series firmware works for both.  To use dual, you have to edit the stepper settings in the firmware.

    1 user thanked author for this post.
    #110539

    Serdar
    Participant

    Correct, but the lowrider used dual Z and a single X, that’s why the series firmware works for both. To use dual, you have to edit the stepper settings in the firmware.

    So, both firmware is same except different stepper settings on MPCNC_Ramps_T8_16T_LCD_32step_DualEndstop?

    #110542

    Jeffeb3
    Participant

    Assuming you wanted dual endstops on the LR (which isn’t as helpful as it seems) and you are willing to home z to zmin, and not zmax, then it’s a few lines of change in the CONFIGURATION_adv.h file. I just pointed John to those changes in his thread:

    https://www.v1engineering.com/forum/topic/mks-gen-l-dual-endstops/#post-110326

    IMO, dual endstops isn’t terribly useful on the the low rider. The two motors move in lock step when wired in series and it’s easy enough to start them against some hard stops to make sure they start square every time. The LR has a 5 foot gantry so it’s going to be easy to get it square with just a tape measure.

    1 user thanked author for this post.
    #110565

    Serdar
    Participant

    Than as a novice, I should start with serial connected setup and make some practice first…

    #110571

    Jeffeb3
    Participant

    That’s what I’d do. It’s well documented from Ryan (the tutorials linked at the top).

    1 user thanked author for this post.
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