On 2/20/2014 9:23 AM, Peter C. Wallace wrote: > On Thu, 20 Feb 2014, Dave Cole wrote: > >> Date: Thu, 20 Feb 2014 09:07:17 -0500 >> From: Dave Cole <[email protected]> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <[email protected]> >> To: [email protected] >> Subject: [Emc-users] Index (Encoder) Homing >> >> Has anyone setup encoder index homing recently with the Hostmot2 driver? >> >> I'm using a 7i43-2 board with a 7i33 and it cannot find the index pulse >> during the final phase of the homing process. >> >> The search velocity is negative and the latch velocity is positive. >> >> I've read the manual, the man 9 hostmot2 file etc. Nothing is popping >> up as being incorrect. >> >> "HOME_USE_INDEX = YES" is present in the INI file. However the axis >> just keep moving slowly looking for the index pulse but it never sees it. >> >> The machine homes fine if "HOME_USE_INDEX = NO" is present in the INI file. >> >> It appears that the encoder index signal is present at the 7i33 board >> terminal. >> >> Thanks, >> >> Dave > First is the encoder N index_enable netted to axis.N.index_enable ? > > > if thats correct the index hardware needs to be checked: > > An easy way to test the index hardware is unlink the encoders index_enable pin > in hal and then manually set index_enable. Then rotate the shaft/encoder > slowly. The index_enable pin should get cleared at only one shaft position. If > it gets cleared immediately, the index polarity may be reversed. if it does > not get cleared in one rotation it probably means the index signal is not > getting to the FPGA, This can be checked with halmeter or halscope watching > the GPIO pin that is used for the index signal. >
Hi Peter, No it was not. Let me try that. Thanks! Dave ------------------------------------------------------------------------------ Managing the Performance of Cloud-Based Applications Take advantage of what the Cloud has to offer - Avoid Common Pitfalls. Read the Whitepaper. http://pubads.g.doubleclick.net/gampad/clk?id=121054471&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
