![]() | |
| Home Page | Mark Forums Read | Today's Posts | My Replies | Classifieds | Reviews | Photo Gallery | Web Links | Share Files | Advertise With Us | Ad List |
| |||||||
| Gecko Drives Discuss all Gecko drives here and get direct support! |
| This forum is sponsored by: |
![]() |
| | LinkBack | Thread Tools | Search this Thread | Display Modes |
|
#2
| |||
| |||
| Hi, If the encoder is 250 counts then it would be 250/5 = 50 steps/unit. If the encoder is 250 lines resulting in 1000 counts then it would be 1000/5 = 200 steps/unit. (At 1:1 gearing) The kernel speed determines the maximum speed that you can set the motors to in the motor tuning dialog. If set to 25kHz and you have 200steps/mm then your maximum speed (if you max out the velocity slider in the motor tuning dialog) is 25000/200=125mm/s or 7500mm/min. Generally you should never set the kernel speed higher than you need. Ie don't increase the kernel speed unless the velocity slider is maxed out and you still need more speed. /Henrik. |
|
#6
| |||
| |||
| Ok see if you can help me figure this out. I have a heds 5701 f00 which is 256 counts. My motor gear is 14 teeth the other is 24 teeth. A 5mm lead screw. In Mach I have my steppes set 8960.544216. It cuts with in 2thousands of inch. I'm satisfied with this. But I have had to work with these numbers a lot to get this accuracy. Why does the above formula not work? Thanks Ed |
|
#8
| |||
| |||
| Hi, Lets see... (256*4) * (24/14) / 5 = 351.0857 steps/mm 351.0857 * 25.4 = 8917.577 steps/inch That's around 0.5% off from what you get which might be accounted for as pitch error of the screw. 0.5% for a garden variety lead screw probably isn't too bad, if it was a ballscrew I'd be a bit surprised. But really, as long as it's accurate and repeatable to whatever specs you actually need the real number of steps/unit doesn't really matter much. |
![]() |
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
| Display Modes | |
| |
Similar Threads | ||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Mach3 Step By Step | brouser1 | Mach Plasma / Laser | 10 | 04-09-2010 09:46 AM |
| G320 Fault & Mach3 | THend | Mach Software (ArtSoft software) | 2 | 11-11-2008 11:07 PM |
| deepgroove1 step dir for mach3 | fartsnostink | Benchtop Machines | 10 | 11-20-2007 01:14 AM |
| Help, how to set step per unit in Mach3 | ata | Syil Products | 4 | 04-18-2007 05:45 PM |
| G320 Locks & Sings, but NO Step | mikkojay | Gecko Drives | 2 | 04-01-2006 03:37 PM |