Can you run with no end stops? I'm ready to start printing with the reprap I just built but I don't have end stops. So far while playing with the machine and the host software it seems like they are required. Is there a way to run it with out them? -Dime https://reprap.org/forum/read.php?151,63169,63169#msg-63169 Wed, 12 Aug 2026 11:20:48 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?151,63169,68235#msg-68235 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,68235#msg-68235 to the first line of code.

G92 X0 Y0 Z0.

what you are doing is zeroing the system to tell it that the location you are at is zero.

so in your build files in skienforge, add this line if it does not exist in alterations file for start.gcode or start.txt

this way even if you forget to home the system, no thrashing or bending will occur because when you run your gcode it automatically zeros.

also a quick tip about skienforge and windows users. when you edit use notepad++ (yes those ++) are part of the name. it is a free program, that has a feature in the edit menu to make it UNIX compatible text. otherwise if you have LF and CR for your line returns, skienforge throws a terrible tantrum.]]> jamesdanielv General Mendel Topics Sun, 12 Dec 2010 19:59:18 -0500 https://reprap.org/forum/read.php?151,63169,63360#msg-63360 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63360#msg-63360 -------------------------------------------------------
> AgeingHippy Wrote:
> --------------------------------------------------
> -----
> > Can you elaborate on this or perhaps a link to
> an
> > elaboration?
>
> Sure! Instead of levelling the bed with the nozzle
> at the z home position and (try to) measure a tiny
> distance evenly, instead move the nozzle above the
> bed to the height where you can just roll a piece
> of your favourite smooth rod (8mm pieces are
> abundant after a Mendel build) under the tip.
>
> This way you avoid the risk of running the nozzle
> into the bed surface. And if you use a long (I use
> 10cm) piece of smooth rod you also get a more even
> measurement if the bed is a tiny bit uneven or
> bumpy. Also, I find it much, much faster to do it
> this way, and thus I tend to check the measurement
> more often.
>
> Just be sure to remove any jagged edges from
> cutting the rod, to ensure it'll roll smooth.


Nice one Nudel. Perhaps this should be placed on the wiki Mendel_squaring_axes page?]]> AgeingHippy General Mendel Topics Mon, 11 Oct 2010 09:49:14 -0400 https://reprap.org/forum/read.php?151,63169,63350#msg-63350 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63350#msg-63350 -------------------------------------------------------
> Can you elaborate on this or perhaps a link to an
> elaboration?

Sure! Instead of levelling the bed with the nozzle at the z home position and (try to) measure a tiny distance evenly, instead move the nozzle above the bed to the height where you can just roll a piece of your favourite smooth rod (8mm pieces are abundant after a Mendel build) under the tip.

This way you avoid the risk of running the nozzle into the bed surface. And if you use a long (I use 10cm) piece of smooth rod you also get a more even measurement if the bed is a tiny bit uneven or bumpy. Also, I find it much, much faster to do it this way, and thus I tend to check the measurement more often.

Just be sure to remove any jagged edges from cutting the rod, to ensure it'll roll smooth.]]> Nudel General Mendel Topics Mon, 11 Oct 2010 09:09:32 -0400 https://reprap.org/forum/read.php?151,63169,63337#msg-63337 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63337#msg-63337 -------------------------------------------------------
> That would be one way to do it. When I level the
> bed (by rolling a piece of 8mm smooth rod under
> the nozzle, great idea by nophead) I prefer to do

Yo Nudel

Can you elaborate on this or perhaps a link to an elaboration?

Cheers]]> AgeingHippy General Mendel Topics Mon, 11 Oct 2010 08:21:10 -0400 https://reprap.org/forum/read.php?151,63169,63306#msg-63306 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63306#msg-63306
Quote

How would do a manual home then?

Move the machine by sending GCode manually to where you want to Home point to be, then press the reset button on the controller. Pressing reset makes all position counters go back to zero.]]> Traumflug General Mendel Topics Mon, 11 Oct 2010 04:17:01 -0400 https://reprap.org/forum/read.php?151,63169,63272#msg-63272 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63272#msg-63272
Of course you can also home manually by using the jog buttons in the host software, which you might prefer.

It's not terribly important to get the homing for x and y just right unless you intend to build on the whole tray. The z axis is important though.]]> Nudel General Mendel Topics Sun, 10 Oct 2010 14:44:31 -0400 https://reprap.org/forum/read.php?151,63169,63268#msg-63268 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63268#msg-63268


-Dime]]> dime General Mendel Topics Sun, 10 Oct 2010 14:24:34 -0400 https://reprap.org/forum/read.php?151,63169,63260#msg-63260 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63260#msg-63260 As DanielG said, it's easy to remove the homing gcodes from repsnapper.]]> Nudel General Mendel Topics Sun, 10 Oct 2010 13:27:18 -0400 https://reprap.org/forum/read.php?151,63169,63250#msg-63250 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63250#msg-63250
Nudel Wrote:
-------------------------------------------------------
> Just edit the firmware to disable the endstops.
> In configuration.h :
> #define ENDSTOPS_MIN_ENABLED 0
> #define ENDSTOPS_MAX_ENABLED 0
>
> Or you could hook up a switch as a mechanical
> endstop.]]> ensgrp General Mendel Topics Sun, 10 Oct 2010 12:00:58 -0400 https://reprap.org/forum/read.php?151,63169,63208#msg-63208 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63208#msg-63208 rhmorrison General Mendel Topics Sat, 09 Oct 2010 17:28:40 -0400 https://reprap.org/forum/read.php?151,63169,63200#msg-63200 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63200#msg-63200 dime General Mendel Topics Sat, 09 Oct 2010 16:49:34 -0400 https://reprap.org/forum/read.php?151,63169,63199#msg-63199 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63199#msg-63199 In configuration.h :
#define ENDSTOPS_MIN_ENABLED 0
#define ENDSTOPS_MAX_ENABLED 0

Or you could hook up a switch as a mechanical endstop.]]> Nudel General Mendel Topics Sat, 09 Oct 2010 16:06:41 -0400 https://reprap.org/forum/read.php?151,63169,63191#msg-63191 Re: Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63191#msg-63191 DanielG General Mendel Topics Sat, 09 Oct 2010 14:49:40 -0400 https://reprap.org/forum/read.php?151,63169,63169#msg-63169 Can you run with no end stops? https://reprap.org/forum/read.php?151,63169,63169#msg-63169
So far while playing with the machine and the host software it seems like they are required.

Is there a way to run it with out them?


-Dime]]> dime General Mendel Topics Sat, 09 Oct 2010 06:10:13 -0400