DRV8825 Stepper Driver Info and Setup
406 views
Skip to first unread message
mUVe 3D Admin
Mar 29, 2017, 12:40:20 PM3/29/17
to mUVe 3D Support Group
All,
Information about the DRV8825 stepper driver from Pololu:
Driver Info: https://www.pololu.com/product/2133
Driver Tuning: https://www.youtube.com/watch?v=89BHS9hfSUk&feature=youtu.be
mUVe 3D Support
Information about the DRV8825 stepper driver from Pololu:
Driver Info: https://www.pololu.com/product/2133
Driver Tuning: https://www.youtube.com/watch?v=89BHS9hfSUk&feature=youtu.be
mUVe 3D Support
Nikolay Kosyrev
Mar 30, 2017, 11:08:55 AM3/30/17
to mUVe 3D Support Group
Just replace a4988 to drv8825.
Motors do not move at all. Tried to adjust current with steps 10 degrees all the way 360.
mUVe 3D Admin
Mar 30, 2017, 11:14:50 AM3/30/17
to mUVe 3D Support Group
Nikolay,
This usually means they were installed backward. Check the pins on the DRV8825 and on the RAMPS board and make sure you installed them properly as a possible solution. However it's worth noting too that installing them backward can destroy them, you may want to have some other motor drivers to check if you still don't get a response after the issue is corrected.
mUVe 3D Support
This usually means they were installed backward. Check the pins on the DRV8825 and on the RAMPS board and make sure you installed them properly as a possible solution. However it's worth noting too that installing them backward can destroy them, you may want to have some other motor drivers to check if you still don't get a response after the issue is corrected.
mUVe 3D Support
Nikolay Kosyrev
Mar 30, 2017, 11:27:10 AM3/30/17
to mUVe 3D Support Group
https://goo.gl/photos/DTiWR8VvPvRCeWoZA
https://goo.gl/photos/yktAJBBtkx1j6WWz5
It seems that it is correct placement.
https://goo.gl/photos/yktAJBBtkx1j6WWz5
It seems that it is correct placement.
mUVe 3D Admin
Mar 30, 2017, 11:31:29 AM3/30/17
to mUVe 3D Support Group
Nikolay,
How about your jumper settings? The A4988 and DRV8825 have different jumper settings.
Also, have you ensured there was no power applied anywhere to the system when you installed the chips? Also the motor cables? If there was any power applied during these processes it can also destroy the motor driver chip.
mUVe 3D Support
How about your jumper settings? The A4988 and DRV8825 have different jumper settings.
Also, have you ensured there was no power applied anywhere to the system when you installed the chips? Also the motor cables? If there was any power applied during these processes it can also destroy the motor driver chip.
mUVe 3D Support
Nikolay Kosyrev
Mar 30, 2017, 11:36:21 AM3/30/17
to mUVe 3D Support Group
I switch off power before any replacing.
Did not change jumpers yet. Are they influence only step size 1/32 or 1\16?
mUVe 3D Admin
Mar 30, 2017, 11:38:20 AM3/30/17
to mUVe 3D Support Group
Nikolay,
Yes they influence step size, but also available current. The higher the stepping rate the more current going through the driver chip and also the weaker the motor output. We recommend 1/16 or 1/4 stepping, though you'll also need to change and upload new firmware settings if you change the stepping rate from what is expected.
mUVe 3D Support
Yes they influence step size, but also available current. The higher the stepping rate the more current going through the driver chip and also the weaker the motor output. We recommend 1/16 or 1/4 stepping, though you'll also need to change and upload new firmware settings if you change the stepping rate from what is expected.
mUVe 3D Support
Nikolay Kosyrev
Mar 30, 2017, 11:42:12 AM3/30/17
to mUVe 3D Support Group
But, anyway, motor should moves a little bit?. It doesn`t.
mUVe 3D Admin
Mar 30, 2017, 12:37:30 PM3/30/17
to mUVe 3D Support Group
Nikolay,
Not if the POT setting is highly incorrect, or you're using 1/32 stepping and/or your leadscrews have drag, otherwise it seems they are most likely damaged.
Have you also ensured you are homing the printer before trying to jog the Z axis? This must always be done, otherwise the RAMPS system will not allow the movement.
mUVe 3D Support
Not if the POT setting is highly incorrect, or you're using 1/32 stepping and/or your leadscrews have drag, otherwise it seems they are most likely damaged.
Have you also ensured you are homing the printer before trying to jog the Z axis? This must always be done, otherwise the RAMPS system will not allow the movement.
mUVe 3D Support
Nikolay Kosyrev
Mar 30, 2017, 1:43:03 PM3/30/17
to mUVe 3D Support Group
No, I did not home the plate. What is the POT settings is?
What I should to do?
If the new setup would not work, I need to return back to A4988.
mUVe 3D Admin
Apr 1, 2017, 11:45:55 AM4/1/17
to mUVe 3D Support Group
Nikolay,
You must home the printer before asking it to make a Z axis motion. This has always been true and will always be true. This step cannot be skipped, especially after everything has been powered down.
The POT is the small screw on the motor driver. You use the video posted at the top of this thread and follow their instructions using a multimeter.
mUVe 3D Support
You must home the printer before asking it to make a Z axis motion. This has always been true and will always be true. This step cannot be skipped, especially after everything has been powered down.
The POT is the small screw on the motor driver. You use the video posted at the top of this thread and follow their instructions using a multimeter.
mUVe 3D Support
Nikolay Kosyrev
Apr 3, 2017, 8:43:21 AM4/3/17
to mUVe 3D Support Group
Without moving z-axis I just replaced back 4988 drivers. All working.
Reply all
Reply to author
Forward
0 new messages