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Axis move only half distance

Posted: Sat May 30, 2015 8:21 pm
by 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,

Re: Axis move only half distance

Posted: Mon Jun 01, 2015 10:31 am
by 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
microstep of 8825.png (81.82 KiB) Viewed 9833 times

Re: Axis move only half distance

Posted: Mon Jun 01, 2015 2:36 pm
by 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?

Re: Axis move only half distance

Posted: Mon Jun 01, 2015 2:57 pm
by 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.

Re: Axis move only half distance

Posted: Mon Jun 01, 2015 11:03 pm
by 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
p.jpg (362 KiB) Viewed 9818 times
how to fix that?

Re: Axis move only half distance

Posted: Tue Jun 02, 2015 9:01 am
by 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.