Auto bed leveling

Phaedrux

Yes I believe so.

https://duet3d.dozuki.com/Wiki/Using_external_stepper_motor_drivers

moe.adams9093

So the expansion port pins are going to the duex5 only left is Coon-lcd and Coon-SD the form is only taking about Coon LCD so is that said only one external can be added or can I use coon lcd and coon SD for 2 motors. Please correct me if I'm wrong I just don't want to order them before I'm 100% sure Thank you.

Phaedrux

@moe-adams9093

From DC42:
"yes, 2 on CONN_LCD
if some of the DueX5 motor outputs are not being used, you could also connect an EBOB to the Duet expansion connector in parallel with the DueX5, then you could use the step/dir outputs for those motor outputs on the EBOB, but not the enable outputs"

moe.adams9093

Thanks for the response I have few questions to set some clarification before I do so. I have 2 avaliable drives on the duex5 if I disable the jumper on the underside for both and take step and dir and Ena will that provide +5v? Also my second question what about the ground lead for -step and -dir, -ena where they will be placed. Third question what will be the number for the drivers in the configuration file. Last question endstops will be connected to the drivers that are associated with the one I disabled. Thank you in advance

dc42

@moe-adams9093 said in Auto bed leveling:

Thanks for the response I have few questions to set some clarification before I do so. I have 2 avaliable drives on the duex5 if I disable the jumper on the underside for both and take step and dir and Ena will that provide +5v? Also my second question what about the ground lead for -step and -dir, -ena where they will be placed. Third question what will be the number for the drivers in the configuration file. Last question endstops will be connected to the drivers that are associated with the one I disabled. Thank you in advance

Two issues here:

The signal levels on the expansion bus are 3.3V with low current. The EBOB converts them to 5V single-ended.
RepRapFirmware expects to find two TMC2660 drivers on a DueX2, or five on a DueX5. If you want to cut the Enable traces to use different numbers and use external drivers in the corresponding slots, you would need to recompile the firmware. We may implement auto-detection of TmC2660 drivers in the future, but that isn't in RRF yet.

Drivers that need single ended drive are best connected between STEP- and +5V on the EBOB for the step input, and similarly for DIR and ENA.

moe.adams9093

Ok I see it looks like its a bit complicated going from EBOB terminal and I thought about one thing is I don't want to lose the additional drives maybe in the future might use those for additional extruder i would say it will better for me to install a shift registrar and convert 3.2 to 5 volt on the COON-LCD connection.
Question can I use boost converter from 3.3 v to 5v or it has to be a logic shift register. Thank you

moe.adams9093

So I just got my hybrid servo closed loop stepper last week and I connected them to arduino and did a simple test just to make sure they can run on 3.3v and they did. Then I connected them to Conn LCD
So
On Driver #10
PUL - >> STP 10 ( LCD-DB5)
DIR - >> DIR 10 ( LCD - DB6)
EN- >> EN 10 ( LCD -DB7 )

PUL + > 3.3V ON Conn Lcd
DIR +> 3.3V ON Conn Lcd
EN + > 3.3V On Conn Lcd
All 3.3v terminal connected in parallel to motor driver
EndStop not connected yet

On Driver #11
PUL - >> STP 11 ( LCD - DB4)
DIR - >> DIR 11 ( LCD - E)
ENA - >> EN 11 ( LCD -RS)
Endstop not yet connected

PUL + > 3.3V ON Conn Lcd
DIR +> 3.3V ON Conn Lcd
EN + > 3.3V On Conn Lcd
All 3.3v terminal connected in parallel to motor driver
EndStop not connected yet

So the 2 Drivers are running on the same positive side pin from 3.3v

The problem I'm having now when I move axis both motors X&Y spins. Can you please explain what would be the solution to fix this problem.
Thanks

moe.adams9093

Never mind I figured it out thanks anyway

Phaedrux

@moe-adams9093 said in Auto bed leveling:

corxy

Was it this?

moe.adams9093

Yes I forgot my build with corxy.