To eliminate the questions about the direction pin timing, I resoldered the
steppers so that the conf of EMC were not using inverted pins, not that it
changed anything in my case.. but I may not have been suffering from the
symptoms you describe.
Best Regards
Kim Mortensen
2008/11/18 BRIAN GLAC
Just a thought, but could this be a power down issue like Kim noted with a
HobbyCNC board? That also was dominant on the Z axis. Setting the amp
enable and a board mod to let EMC manage it fixed my missed step issues.
Brian
--
Dave Houghton wrote:
>
> Steve wrote
> Loosing steps on change of direction is a relatively common fault, it
> seems to show up more on Z axis, it's usually caused by having the wrong
> pulse direction. If it's active high, invert it to active low, or vice
> versa.
>
> Steve Blackmore
> --
> OK
Steve wrote
Loosing steps on change of direction is a relatively common fault, it
seems to show up more on Z axis, it's usually caused by having the wrong
pulse direction. If it's active high, invert it to active low, or vice
versa.
Steve Blackmore
--
OK Thanks I can certainly do that. But will
Rayh wrote
Moving up more likely to miss steps than down is true if the backlash
compensator on Z is properly set so that you feel equal resistance both
ways while hand cranking the axis. When you do this you should remove
all power from the drive and unplug that stepper motor.
Rayh
Hello Ray
Set
On Tue, 18 Nov 2008 00:54:40 +0200, you wrote:
>I'm trying to figure out the best way to avoid missed steps especially in
>the Z axis, with my Sherline mill. Lets say my max vel.=7.5mm/sec, and max
>acc=15mm/sec^2 (sorry to inch users) as set up with 'stepconf'. During the
>manufacture of this li
Chris Radek wrote.
When you say Sherline a big red light comes on in my head. There has
been a lot of talk lately about the timing parameters in stepconf. If
your Z is slowly creeping down, I bet some timing is wrong.
An acceleration or velocity problem with Z moving up won't generally
lose
On Tue, 2008-11-18 at 00:54 +0200, Dave Houghton wrote:
> Now as I understand it is more likely to lose steps going up (mill
> head weight) than down. So by the time I get to the twentieth cut, with
> missed steps etc. it could be cutting a few thou' deeper than it should. Now
> that's a disaster I
John Kasunich wrote>
>
Acceleration remains the same.
A rapid move at 7.5mm/sec (450mm/min) with an acceleration of 15
mm/sec^2 will take one-half second to get up to speed, and one-half
second to slow down again - 7.5mm/sec divided by 15mm/sec^2 is 0.5 seconds.
A slow cutting move at 0.16
On Tue, Nov 18, 2008 at 12:54:40AM +0200, Dave Houghton wrote:
> Hello Everyone
>
> I'm trying to figure out the best way to avoid missed steps especially in
> the Z axis, with my Sherline mill.
When you say Sherline a big red light comes on in my head. There has
been a lot of talk lately about
Dave Houghton wrote:
> Hello Everyone
>
> I'm trying to figure out the best way to avoid missed steps especially in
> the Z axis, with my Sherline mill. Lets say my max vel.=7.5mm/sec, and max
> acc=15mm/sec^2 (sorry to inch users) as set up with 'stepconf'. During the
> manufacture of this littl
Hello Everyone
I'm trying to figure out the best way to avoid missed steps especially in
the Z axis, with my Sherline mill. Lets say my max vel.=7.5mm/sec, and max
acc=15mm/sec^2 (sorry to inch users) as set up with 'stepconf'. During the
manufacture of this little item the milling head will go u
12 matches
Mail list logo
