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H500 6amp 60v 10 microstep bipolar... 06-02-2011, 05:38 AM
doorknob My search for a "5 Microstep... 06-02-2011, 02:33 PM
H500 The full pdf file is located... 06-03-2011, 03:34 AM
doorknob Thanks for the pointer to the... 06-03-2011, 04:27 AM
James Newton In the interests of saving... 06-03-2011, 08:34 PM
James Newton It does look really... 06-03-2011, 08:35 PM
H500 There are several items that... 06-03-2011, 11:50 PM
H500 Here's a shot of the... 06-03-2011, 04:21 AM
H500 I added gate resistors to... 06-12-2011, 03:52 AM
H500 I added slope compensation... 06-12-2011, 05:43 PM
James Newton On a more general level: Is... 06-12-2011, 08:06 PM
H500 The key is to use the proper... 06-14-2011, 12:48 AM
Mariss Freimanis An MCU is a sequential... 06-14-2011, 01:03 AM
RomanLini I understand all that, but... 06-14-2011, 01:25 PM
H500 The main advantages are... 06-15-2011, 03:15 AM
H500 I am noticing a small amount... 06-26-2011, 06:59 PM
H500 Here is the schematic and... 06-29-2011, 06:18 AM
lucas I've followed this thread and... 07-05-2011, 06:03 PM
H500 I don't really understand... 07-06-2011, 04:30 AM
H500 Something I would really like... 07-12-2011, 05:51 AM
lucas First off: thanks for your... 07-12-2011, 05:58 PM
H500 It's actually very easy to... 07-13-2011, 03:22 AM
lucas Well for me it ain't that... 07-13-2011, 07:41 PM
lucas Addition to the resonance... 07-12-2011, 06:50 PM
H500 It looks good. Very similar... 07-14-2011, 12:57 AM
lucas High time for an update, a... 07-26-2011, 11:55 PM
H500 Good job! I was hoping... 07-27-2011, 01:22 AM
lucas First off: Thanks very much... 07-27-2011, 10:09 PM
H500 I'm glad my code was helpful.... 07-28-2011, 12:17 AM
lucas I modified the original code... 07-28-2011, 08:52 AM
H500 Thanks. I will take a look... 07-29-2011, 12:15 AM
lucas I can only compare with a DIY... 07-29-2011, 11:03 PM
H500 I haven't done extensive... 07-30-2011, 12:31 AM
lucas Opto's already installed,... 07-30-2011, 10:24 PM
doorknob lucas, I haven't been... 07-30-2011, 10:40 PM
H500 How severe are the missing... 07-31-2011, 05:03 AM
lucas I'm really looking forward to... 07-31-2011, 12:09 PM
H500 I won't be able to work on it... 07-31-2011, 04:18 PM
lucas I was using Turbocnc for the... 07-31-2011, 11:14 PM
H500 I tried your g-code several... 08-01-2011, 04:52 AM
lucas Progress, problem has been... 08-01-2011, 12:01 PM
H500 Excellent. Troubleshooting is... 08-01-2011, 01:40 PM
lucas The 10K-100p filter on the... 08-01-2011, 09:53 PM
H500 I'm glad you were able to fix... 08-01-2011, 11:42 PM
lucas The reason for your missed... 08-02-2011, 06:37 PM
H500 The drive has schmitt trigger... 08-02-2011, 11:43 PM
lucas I use my own design since a... 08-03-2011, 08:12 AM
H500 The chip looks very simple to... 08-03-2011, 10:52 PM
lucas LMD18245... Would that be a... 08-11-2011, 08:19 PM
H500 Yes, the design was similar... 08-12-2011, 01:43 AM
KOC62 No Load RPM 08-12-2011, 03:02 AM
H500 This drive will need a proper... 08-12-2011, 01:50 PM
nm156 FPGA system 01-29-2012, 02:04 AM
H500 Interesting idea. I will... 01-29-2012, 03:00 AM
nm156 Nice work on the projects you... 01-29-2012, 04:29 AM
H500 Years ago, I also played with... 01-29-2012, 05:23 PM
Mariss Freimanis My 2 cents on the subject: ... 01-29-2012, 07:39 PM
lucas Mariss, thanks for the info... 01-29-2012, 09:31 PM
Mariss Freimanis Part II, Low-speed... 01-29-2012, 09:19 PM
Mariss Freimanis Part III, Step servo. An... 01-29-2012, 09:53 PM
Mariss Freimanis lucas, The dump circuit is... 01-29-2012, 09:58 PM
lucas Thanks very much for all the... 01-29-2012, 10:37 PM
Mariss Freimanis lucas, Is that your board?... 01-30-2012, 01:32 AM
lucas Mariss, thanks for the... 01-30-2012, 10:32 AM
H500 Marriss, Thanks for the... 01-31-2012, 03:32 AM
nm156 Okay, I'm not an EE, just a... 02-02-2012, 02:48 AM
H500 A lot of interesting... 02-04-2012, 02:31 AM
ghoang motor current setting 06-19-2012, 06:06 AM
Mariss Freimanis It's subject unto itself how... 02-04-2012, 07:36 AM
H500 I just tried adding in the... 02-05-2012, 01:32 AM
tivoidethuong to h500, are you have test... 03-30-2012, 02:14 AM
H500 I will post one on the... 03-30-2012, 11:08 PM
H500 Here's a short clip of the... 03-31-2012, 11:58 PM
tivoidethuong hi h500, could you test drive... 04-01-2012, 12:59 AM
H500 Here are more videos. ... 04-01-2012, 07:07 PM
tivoidethuong to h500 i try build soon,... 04-04-2012, 01:38 PM
tivoidethuong hi H500, are you have any... 05-04-2012, 01:08 PM
H500 There's no problem at any... 05-04-2012, 10:45 PM
tivoidethuong thanks h500, i trying layout 05-05-2012, 08:01 AM
H500 Ghoang, I did not design... 06-20-2012, 04:30 AM
ghoang help me 06-20-2012, 06:20 AM
H500 Ghoang, I don't know if... 06-20-2012, 11:46 PM
ghoang hi H500! I haven’t built... 06-21-2012, 08:14 AM
H500 Ghoang, Keep in mind that... 06-22-2012, 01:02 AM
ghoang Hi H500, Thank for great... 06-22-2012, 04:12 PM
H500 Ghoang, Post your schem... 06-23-2012, 02:30 AM
ghoang Hi H500 Latch-up mosfet... 06-23-2012, 05:28 AM
H500 Ghoang, That's a good... 06-23-2012, 01:58 PM
ghoang Hi H500,e I enclosed schema,... 06-23-2012, 02:09 PM
H500 Ghoang, Your schem looks... 06-23-2012, 03:30 PM
ghoang Hi H500, Thank for your... 06-23-2012, 07:51 PM
ghoang Hi H500, I finished PCB, pls... 06-26-2012, 02:53 PM
H500 Ghoang, The ideal position... 06-27-2012, 01:31 AM
ghoang Hi H500, You commented about... 06-27-2012, 01:50 AM
ghoang Hi H500, I modified PCB... 06-27-2012, 04:05 PM
H500 Ghoang, It looks good. ... 06-27-2012, 11:10 PM
ghoang Hi H500, I will sent file to... 06-28-2012, 02:07 PM
H500 Ghoang, see the photos in... 06-29-2012, 12:14 AM
ghoang Hi H500, Thank for your... 07-01-2012, 02:46 PM
Dzeus Hi; I've build a driver using... 01-20-2014, 10:38 AM
H500 Are you certain the sense... 01-22-2014, 03:09 AM
Dzeus thanks for the reply, yes I'm... 01-22-2014, 08:57 PM
H500 The tantalum caps should be... 01-23-2014, 04:09 AM
Dzeus Please H500 when you say in... 01-23-2014, 10:27 PM
H500 Connect the meter as follow ... 01-24-2014, 03:43 AM
Dzeus I killed 4 fets before... 01-28-2014, 10:40 AM
H500 Be sure the ammeter is set to... 01-30-2014, 01:26 AM
Dzeus Yes the ammetre is set to... 01-30-2014, 09:29 AM
H500 6.8mh is very high. Your... 01-31-2014, 12:14 AM
Dzeus I bought some irf640 too,... 01-31-2014, 12:23 PM
yngndrw Re: 6amp 60v 10 microstep... 11-02-2016, 02:02 PM
yngndrw Re: 6amp 60v 10 microstep... 11-06-2016, 12:58 AM
Mariss Freimanis Re: 6amp 60v 10 microstep... 11-06-2016, 08:34 PM
yngndrw Re: 6amp 60v 10 microstep... 11-07-2016, 09:53 PM
Mariss Freimanis Re: 6amp 60v 10 microstep... 11-07-2016, 10:41 PM
yngndrw Re: 6amp 60v 10 microstep... 11-08-2016, 11:38 PM
yngndrw Re: 6amp 60v 10 microstep... 11-11-2016, 12:32 AM
tivoidethuong Re: 6amp 60v 10 microstep... 12-04-2016, 04:35 PM
websrvr Re: 6amp 60v 10 microstep... 12-19-2016, 09:24 PM
tivoidethuong Re: 6amp 60v 10 microstep... 12-22-2016, 04:15 PM
websrvr Re: 6amp 60v 10 microstep... 12-23-2016, 01:45 AM
tivoidethuong Re: 6amp 60v 10 microstep... 12-30-2016, 11:23 AM
websrvr Re: 6amp 60v 10 microstep... 12-31-2016, 08:52 AM
yngndrw Re: 6amp 60v 10 microstep... 12-31-2016, 03:45 PM
websrvr Re: 6amp 60v 10 microstep... 12-31-2016, 09:16 PM
websrvr Re: 6amp 60v 10 microstep... 02-07-2017, 12:15 PM
yngndrw Re: 6amp 60v 10 microstep... 12-31-2016, 11:02 PM
websrvr Re: 6amp 60v 10 microstep... 01-03-2017, 03:40 AM
yngndrw Re: 6amp 60v 10 microstep... 01-03-2017, 02:06 PM
websrvr Re: 6amp 60v 10 microstep... 01-04-2017, 12:42 AM
websrvr Re: 6amp 60v 10 microstep... 01-04-2017, 12:32 AM
websrvr Re: 6amp 60v 10 microstep... 01-04-2017, 01:32 PM
tivoidethuong Re: 6amp 60v 10 microstep... 01-05-2017, 01:03 PM
websrvr Re: 6amp 60v 10 microstep... 01-06-2017, 12:37 AM
tivoidethuong Re: 6amp 60v 10 microstep... 01-06-2017, 11:14 AM
websrvr Re: 6amp 60v 10 microstep... 01-07-2017, 03:57 AM
phomann Re: 6amp 60v 10 microstep... 02-07-2017, 12:42 PM
websrvr Re: 6amp 60v 10 microstep... 02-08-2017, 12:30 AM
H500 Re: 6amp 60v 10 microstep... 02-12-2017, 12:47 AM
tivoidethuong Re: 6amp 60v 10 microstep... 02-17-2017, 02:54 PM
websrvr Re: 6amp 60v 10 microstep... 05-23-2017, 01:35 AM
tivoidethuong Re: 6amp 60v 10 microstep... 05-23-2017, 07:50 AM
tivoidethuong Re: 6amp 60v 10 microstep... 05-23-2017, 09:43 AM
tivoidethuong Re: 6amp 60v 10 microstep... 05-29-2017, 06:22 AM
  1. #1
    lucas,

    The dump circuit is unnecessary for recirculating mode standby. By definition the attack slope is steeper than the decay slope in this mode.

    By the way H500's 06-12-2011, 09:43 AM post scope pictures show pronounced notches at the full-step locations (sin 0, 90, 180, etc.). This is due to an overly long reset pulse applied to the time-base counter. The reset pulse synchronizes the PWM to the step pulse frequency at the full-step rate. The purpose is to prevent beat frequencies between the step rate and the PWM frequency. An overly long reset duration introduces such artifacts.

    Mariss

  2. #2
    Join Date
    Jan 2005
    Posts
    364
    Thanks very much for all the info wich you provided to allow us hobbiests build a decent drive.

    I have a machine running with CPLD drive's from your tutorial and PCB design using your recommendations on PCB layout, it's working fine.
    Will try to see what difference the change on the DUMP signal makes.


    Quote Originally Posted by Mariss Freimanis View Post
    4) Circle the projected beam on the wall with a pencil.
    Writing on the wall was forbidden by my ex-wife and I do forbid it to my grandchild also... :devious:

    Edit:
    Quote Originally Posted by Mariss Freimanis View Post
    By the way H500's 06-12-2011, 09:43 AM post scope pictures show pronounced notches at the full-step locations (sin 0, 90, 180, etc.). This is due to an overly long reset pulse applied to the time-base counter. The reset pulse synchronizes the PWM to the step pulse frequency at the full-step rate. The purpose is to prevent beat frequencies between the step rate and the PWM frequency. An overly long reset duration introduces such artifacts.
    I understand the synchronisation function between the step and PWM and I saw those notches also but seem to remember that there was a problem with the timebase counter, as far as I remember: The blanking period period doesn't start at the zero count. This didn't create problems with the original code but did when the code was modified for additional functions.
    Have to check my notes but I think these notches were gone when I modified it.
    Attached Thumbnails Attached Thumbnails S6000522.jpg  

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