Longboat Prusa using Pronterface. I am troubleshooting why I am getting some dodgy prints. Using Pronterface I can click on the +Y 100mm travel and it works super. If I click on the -Y travel then I get problems. Most of the time it doesnt travel the full 100mm, sometimes nowhere near 100mm and yes I am definately not clicking the 10mm feed by mistake :) . +Y 100mm travel works 100% of the time and -Y 100mm travel works less than 10% I would say. I can use the shorter 10mm travel and both directions work 100%. I can shuttle to and fro counting the number of times I press the buttons and it all works tickety boo with 10mm travel. I have checked that the belt is ok. I didnt think this would be the problem because it doesnt seem to attempt to travel the full 100mm. I have changed the current on the pololu driver current and the problem is consistent. I have checked the freedom of the Y axis movement in both directions manually with the power off and it is fine. It is definately not sticking anywhere along its travel. I have swapped the X axis connection on the board with Y axis so when I click on +Y the X axis moves and the problem is still there. Works fine in the +X 100mm travel but not in the -X 100mm travel. I did think it could be a duff motor but I am thinking maybe duff Pololu driver? https://reprap.org/forum/read.php?1,127351,127351#msg-127351 Mon, 12 Oct 2026 05:14:54 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,127351,127727#msg-127727 https://reprap.org/forum/read.php?1,127351,127727#msg-127727
Besides stepper skiping steps a sliding shaft may cause weird results too.]]> misan General Sat, 07 Apr 2012 10:04:57 -0400 https://reprap.org/forum/read.php?1,127351,127713#msg-127713 https://reprap.org/forum/read.php?1,127351,127713#msg-127713 -------------------------------------------------------
> well if you swapped x and y that would have used a
> different pololu.

Ah yes but it was then the X-axis travel that was incorrect. Sorry this probably wasnt clear.

Anyway, I have tried with different Sanguinololu board, new end stop wires and the problem is still there!!
It is not causing an issue with my prints I dont think as it is only the 100mm travel.
Bizzare really. It isnt the Pololu drivers as it happens using different ones. It isnt the motor as I can get it to happen on the x axis as well.
It isnt the end stops.
So what can it be? I can only think it is some problem with Pronterface. Something odd with my installation or something.

No resolution but as I say not really impacting on general printing so leaving it alone for now.]]> Emin8 General Sat, 07 Apr 2012 06:46:57 -0400 https://reprap.org/forum/read.php?1,127351,127357#msg-127357 https://reprap.org/forum/read.php?1,127351,127357#msg-127357
Are your motor and end stop wires running together?]]> nophead General Wed, 04 Apr 2012 16:02:50 -0400 https://reprap.org/forum/read.php?1,127351,127353#msg-127353 https://reprap.org/forum/read.php?1,127351,127353#msg-127353 se5a General Wed, 04 Apr 2012 15:45:13 -0400 https://reprap.org/forum/read.php?1,127351,127351#msg-127351 https://reprap.org/forum/read.php?1,127351,127351#msg-127351
I am troubleshooting why I am getting some dodgy prints.

Using Pronterface I can click on the +Y 100mm travel and it works super. If I click on the -Y travel then I get problems. Most of the time it doesnt travel the full 100mm, sometimes nowhere near 100mm and yes I am definately not clicking the 10mm feed by mistake :) . +Y 100mm travel works 100% of the time and -Y 100mm travel works less than 10% I would say.

I can use the shorter 10mm travel and both directions work 100%. I can shuttle to and fro counting the number of times I press the buttons and it all works tickety boo with 10mm travel.

I have checked that the belt is ok. I didnt think this would be the problem because it doesnt seem to attempt to travel the full 100mm.

I have changed the current on the pololu driver current and the problem is consistent.

I have checked the freedom of the Y axis movement in both directions manually with the power off and it is fine. It is definately not sticking anywhere along its travel.

I have swapped the X axis connection on the board with Y axis so when I click on +Y the X axis moves and the problem is still there. Works fine in the +X 100mm travel but not in the -X 100mm travel.

I did think it could be a duff motor but I am thinking maybe duff Pololu driver?]]> Emin8 General Wed, 04 Apr 2012 15:33:36 -0400