Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: nneukinn on May 02, 2019, 03:28:11 PM
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Just trying to connect these two steppers to mach3 . Have to have something wrong. Do you guys have settings for the 85bygh450d-008 stepper connected to DQ860MA to a generic "mach3 interface board"
I cant get them to move at all really. Few connections are as below:
red A+
green A-
YellowB+
BlueB-
Pins are set to X 2, 3
Z 6, 7
^steplow
25000hz
estop 1, 10 active low
motor tune
1600 400 200 0 0 on both
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Just trying to connect these two steppers to mach3 . Have to have something wrong. Do you guys have settings for the 85bygh450d-008 stepper connected to DQ860MA to a generic "mach3 interface board"
I cant get them to move at all really. Few connections are as below:
red A+
green A-
YellowB+
BlueB-
Pins are set to X 2, 3
Z 6, 7
^steplow
25000hz
estop 1, 10 active low
motor tune
1600 400 200 0 0 on both
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Follow wiring diagram at:
https://www.aliexpress.com/item/EU-Germany-Free-Shipping-1Axis-Nema-34-Stepper-Motor-878OZIN-motor-Driver-DM860A-peak-7-8A/1390801120.html
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You did not connect Enable :)
One side is connected ti +5V and other?
;)
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on your Photo it Looks like ENBL+ is connected to PC5V
for a first try i would connect ENBL- to PCGND, and if it is working to a free OUTPUT of BOB and use the OUTPUT
for the enable.
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I have small 3axis cnc with nothing connected to enable+ and - drivers.. but i think that is ok if your interface board shares the same power supply as the drivers. My Interface board is on its own 12v supply and the drivers on the 60v supplies. So imagine my problem is the power and ground setup. I guess I do need to use the enable+ and - then or something along those lines. Will try a few things. Thanks
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from this Manual:
https://www.factorydaily.com/fdattachs/fdattachs7/112716014424312.pdf
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Yea I had it connected to Enable+ which is all it sounds you needed to do. It wasnt working but the motors were like powered on and holding position or locked. Just couldnt get mach3 to run the motors.
I connected the Enable- to pcground and it didnt help.. the motors unlocked and spun by hand free like they were off.
Wish I had a extra "mach3 interface board" just to test. Ill prob order one or two up ha.
I peaked at this video and its the same parts for the most part and works for him so not sure what my issue is.
https://www.youtube.com/watch?v=8j9oOgNIbJc
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I put the Enable- on driver to pin14 on IB and in Mach3 Output signals, set enable1 to port 1 pin 14 and checked green with no changes as if I just left enable- on drive disconnected.
I can hear the motors kinda respond with jog, but no major movement at all.
Found this video for the 5axis mach3 interface board... double checked everything for normal new setup.
https://www.youtube.com/watch?v=rcUoUkdcE18
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I can hear the motors kinda respond with jog, but no major movement at all.
Please make sure that the microstep per rev at the DM860A are set to 1600 and nothing higher.
see attached
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Yes on 1600 on dips on driver.. and set at 1600/400/200/0/0 on tune page. I put dip switch4 on for full current on driver and off no change. Have used the two highest amp setting on dip also, 6,7,8 doing ON OFF OFF and OFF OFF OFF for 7. or 7.8amp
Tried another computer I use to run a 3axis and it didnt change anything on the new setup where im just trying to run this lathe Im having issues with.
Cant think of what else can be the issue here
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Have used the two highest amp setting on dip also, 6,7,8 doing ON OFF OFF and OFF OFF OFF for 7. or 7.8amp
Cant think of what else can be the issue here
I think the common Nema 34 bundled5 with DQ860MA is 3.5A MAX ONLY.
7 amp and 7.8 amp settings could have burnt up some of the stepper motor windings.
Also how many watts is your PSU?
Say it is 400W at 36volts. That is only 11Amps MAX.. How it that then able to supply 7.8A per phase to 2 or 3 motors? Just do the MATH.
Think before you try anything.
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I think the common Nema 34 bundled5 with DQ860MA is 3.5A MAX ONLY.
DQ860A is 7amp peak 5amp rms, or 7.8amp peak 5.6rms for those last two settings.. the motor 85bygh450d-008 says 5.6amp. The 60volt psu is 5.85amp. These are cold unworked motors under no load so its not going to burn up coils just in a 1sec jog attempt. I also have this on all 240v so usually less heat, more efficiency and lower amps used on the psu plus higher output by psu.
Im using one 60v psu per motor on lathe so just two motors, two 60v psu per motor. 12v transformer to power the Mach3 Interface board(M3IB), and 5v usb to M3IB to power the 5+ on drivers.
I still think there is something else wrong, not the amp settings or toasting coils.
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check PC5V to PCGND with a Voltmeter for 5V.
for a simple test you can take the Pul- wire and put it to PCGND.
PUL+ should be connected to PC5V.
every time you do this the Motor must do one single step.
then you see wether the Problem is on the stepper side or BOB side.
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here:
https://www.youtube.com/watch?v=uglCm_qsojk
is a Video how to test the single signals, it is for parallel port but
the principal test is the same, just use the terminals of the BOB.
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Thanks TPS! I tried grounding the X like you said and it stepped... so then after looking at your video.. I was like damn I need to just test each axis on this interface board with a single driver/stepper connected. So X works, Y works, got to Z and its messed up so its a bad mach3 interface board I hooked the Z on lathe to Y and changed pins on Mach3 and everything is working fine for now. Ill order another board or two just to have a fully working one. Thanks guys!