On 8/27/2014 11:44 AM, alex chiosso wrote: > Hi Philipp . > You point to the right direction. > I need a full control over the needle movement because I have to start the > X-Y movement before the needle is at top position .
Easy enough to do. Find a place in the machine on the needle drive shaft to place a disk and optical sensor. Have the disk block the sensor for all of the rotation where the needle will be into the fabric and unblocked from the time it pulls out to just before it goes back in. Might even be able to use a strip of aluminum tape partway around the edge of the handwheel (if the machine has one) and a reflection sensor. If the wheel has a polished rim, blacken or rough up part of the edge to change reflectance. Attaching a more robust sensor and disk there could work, but anything external like that in an industrial environment would require a cover or guard. So sensor blocked = lock out all XY movement, unblocked = allow XY movement. Should be able to connect that sensor to a command to pause/unpause the step streams to the motor drivers. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
