Axis move only half distance

[24ariel3]

My problem is that the X and Y axis move only half of what should be their travel distance
for example instead of moving 20CM they only move 10CM and "think" they have moved 20CM


Im using ramps 1.4+DRV8825 drivers all caps under the driver are set also Im using this printer settings
http://www.geeetech.com/wiki/index.php/ ... To_set_up
and this slicer settings
http://www.geeetech.com/forum/viewtopic ... 14&p=23903

Thank you,

[zhangxueyou]

I think you set the microstep of x and y motors as 1/32.
Usually, when you use A4988 as driver, all the jumper caps should be plugged, and microstep will be 1/16.
But if you are using DRV8825, you need to unplug some caps. Look at the picture:

microstep of 8825.png (81.82 KiB) Viewed 9835 times

[24ariel3]

Hello I got a suggestion from another forum:

In configuration.H and double the value.
OLD: #define DEFAULT_AXIS_STEPS_PER_UNIT {78.74, 78.74, 2560, 95} by

NEW: #define DEFAULT_AXIS_STEPS_PER_UNIT {157.48, 157.48, 5120, 190}

What do you think?

[zhangxueyou]

I think changing the firmware works too. You can try to move the axes to the max position after changing.
But I don't suggest you change the firmware, it's time consuming.

[24ariel3]

Ok I've changed it to 1/16 by disconnection caps 1 and 2 now it seems like it is travels the right distance but now I have new problem

p.jpg (362 KiB) Viewed 9820 times

how to fix that?

[zhangxueyou]

The distance between between nozzle and hot bed is not low enough.
The first layer is very important for the whole item.
When you are priting, I suggest you adjust the distance by rotating the 4 screw anticlockwise at the 4 corners of bed. No gaps between printed lines is good.
The first layer should be flat. I suggest you smear a layer of glue to make the filament stick to bed.