Re: [Emc-users] Pittman BLDC + 7I39 experience?
On 22 July 2012 02:29, John Kasunich jmkasun...@fastmail.fm wrote: I would like to drive them with a 5i20 and 7i39, and LinuxCNC's bldc HAL component. I haven't really started digging into the docs yet, I was just wondering if anyone has any experience with these or similar motors. I have run similar motors, it should be moderately straightforward. Inelegant as it might be, I tend to just run through the bldc patterns in halcmd to find which make the motor spin, then see which of those spin it best. You can start off in h mode, so that bldc.comp stays in trapezoidal/6-step mode while choosing the best Hall pattern, then change to qh mode and connect the encoder rawcounts pin if you want to use sinusoidal commutation. The 7i39 firmwares don't claim any pins for Hall sensors, simply leaving a gap in the pin allocation as gpio. This sometimes causes confusion. SVTP6_7I39.BIT is probably the firmware you want. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Pittman BLDC + 7I39 experience?
I recently picked up a couple Pittman ELCOM ST brushless servo motors. I haven't been able to find data for the exact part number, but everything appear to match up with the N2311 with 18.3V windings as described in this data sheet: www.control-drive.com/Products/Servo_Motors/PITTMAN/est_Brushless_2300.pdf The ones I have include both hall sensors (color code matches that datasheet) and a 1000 CPR encoder. I would like to drive them with a 5i20 and 7i39, and LinuxCNC's bldc HAL component. I haven't really started digging into the docs yet, I was just wondering if anyone has any experience with these or similar motors. Thanks, -- John Kasunich jmkasun...@fastmail.fm -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pittman BLDC + 7I39 experience?
John Kasunich wrote: I recently picked up a couple Pittman ELCOM ST brushless servo motors. I haven't been able to find data for the exact part number, but everything appear to match up with the N2311 with 18.3V windings as described in this data sheet: www.control-drive.com/Products/Servo_Motors/PITTMAN/est_Brushless_2300.pdf The ones I have include both hall sensors (color code matches that datasheet) and a 1000 CPR encoder. I would like to drive them with a 5i20 and 7i39, and LinuxCNC's bldc HAL component. I haven't really started digging into the docs yet, I was just wondering if anyone has any experience with these or similar motors. Thanks, I have had a Pittman 4443 motor on my minimill for several years. It is the long, skinny motor, not like the picture in your link. I don't know if that makes any difference. It works quite well with six-step drive. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
