On 2/20/2014 9:53 AM, Dave Cole wrote: > > > 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
It works! 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
