Well that was interesting.
I created a, modest, screw compensation file and I'm most impressed by
the effect.
I added a limit switch for X home in the middle of the table (to get
some repeatability of the axis screw position) and did:
HOME reset DRO X-Axis
G0 X100 take
On 5 September 2013 19:08, Russell Brown russ...@lls.lls.com wrote:
Were the 'errors' I showed (~.015mm over a 50mm move) in the right ball
park for a non-ball-screw benchtop mill driven by steppers?
Not brilliant, but then I doubt that the machine is driven by
super-precision screws.
Should
Quoth bodge...@gmail.com.
On 5 September 2013 16:33, Russell Brown russ...@lls.lls.com wrote:
Is this the sort of thing that a screw compensation table is meant to
deal with? If so, how do I actually measure the numbers for the table?
Then just run up the table, G0 X10, note the reading
On 5 September 2013 16:33, Russell Brown russ...@lls.lls.com wrote:
Is this the sort of thing that a screw compensation table is meant to
deal with? If so, how do I actually measure the numbers for the table?
Normally it is quite difficult. But as you have glass scales then it
seems like it
What are the DRO readings vs. commanded position at regular intervals along
the entire length of travel?
On Thu, Sep 5, 2013 at 1:20 PM, andy pugh bodge...@gmail.com wrote:
On 5 September 2013 19:08, Russell Brown russ...@lls.lls.com wrote:
Were the 'errors' I showed (~.015mm over a 50mm
If you do bidirectional compensation then backlash does not apply.
I think I would adjust the scale to get the numbers to match as good as
possible. Then the compensation values would be small.
On Thu, Sep 5, 2013 at 1:20 PM, andy pugh bodge...@gmail.com wrote:
On 5 September 2013 19:08,
Were the 'errors' I showed (~.015mm over a 50mm move) in the right ball
park for a non-ball-screw benchtop mill driven by steppers?
This sounds well within then range if normal screws if not better than I
would have expected. Another way of looking at this is it is 0.03% error.
Very small.
