Duet3D 1HCL - Closed Loop Controller Beta test

supertb1

@dc42 I'm well into my first print in closed loop and all is well, I played with that tuning procedure a bit and after I had tried a few times to enter the PDand I variables according to the examples, the X axis it wouldn't perform the homing maneuver so I just put it back the way it was and I am happy with the amount of noise, accuracy, and temp of the motors during operations... so all in all a success. Looking forward to the next update, advice on homeall.g and any streamlining/improvements that have been made. let me know if there is any procedures you would like me to try.

dc42

@supertb1 we hope to release firmware 3.4beta5 shortly, which includes some improvements to the closed loop tuning mechanism. For details, see https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x-Beta-&-RC#reprapfirmware-340beta5.

supertb1

@dc42 Just an update, I have beta 5 installed and am in to my 3rd three day print and there is no sign of any missed steps or shifting of any kind, my prints are holding a tight tolerance and I am very happy with the results... how long before I can buy another set of boards?

T3P3Tony

@supertb1 thanks for the feedback! We will have information about the production run once the shcedule is confirmed.

MaxGyver

I would like to give a quick thank you to everyone involved with the development of the 1HCL-Boards and the closed loop plugin.

Running my printer in closed loop is a real quantum leap for me. I can now comfortably print at speeds and accelerations that were really pushing the limits in open loop. In addition, the new level of reliability enables me to run larger print jobs for longer unsupervised periods. My printer was already very tough and reliable, but adding closed loop control fixed the last weak link in the chain.

I am eagerly awaiting further developments and improvements. For example, having linear encoders that measure the head's position on the axis independent of belts and pulleys would be the ultimate closed loop solution. But I am digressing.

Good job everyone!

Cheers Max

A Former User

@dc42
Hey
While you're printing with this pieces of gold, I ask myself where I can buy this board or how I can also test it?

I'm producing custom extra large toolchanger, so it would be that helpful!!
Cheers
Richard

dc42

@maxgyver what kinematics does your machine use? We've experienced some issues converting one of our CoreXY machines to use the 1HCL board and motors+encoders; and we don't know whether it is as issues with this particular machine+motors+encoders or a more general problem with closed loop control of coupled motors.

A Former User

@dc42
I have cartesian printers.
4 y motors
2 y motors
1x motor

X and Y working with a closed loop system would be nice.

Cheers
Richard

samlogan87

@T3P3Tony is there any news on these boards? Still keen to get 2

MaxGyver

@dc42 My Kinematics are IDEX (Dual Markforged aka Haq XY) with dual Y-Motors.

; Kinematics
M669 K11 Y1:1:0:-1	; Matrix mapping for Axis - X:Y:Z:U

So far, I had no mayor issues converting to closed loop.

A Former User

@dc42

A curious european company wanna try 1HCL.

Please provide us some information for further planning.
We need the 1HCL but we can´t wait another half a year with testing etc.

KR
Richard

dc42

@gruna-studio a first small production run is currently under way.

A Former User

@dc42
Nice, Can I pre order some?

I need to install the 1HCL with an external encoder because my machines have a double shaft on x axis.
So I can do a documentation how to place the magnetic encoder install on this board... the documentation says, that for this there will be a description in future.
Let me know.
Cheers
Richard

dc42

@gruna-studio so far the best results we've seen have been using motors with built-in encoders. We're also testing some motors with external encoders, but we've had some difficulties with one of them.

tristanryerparke

@dc42 I’d like to order some as well when they become available. Please let us know if we can pre-order.
Also, could you describe in more detail the issues with closed loop corexy that you mentioned?
I would be willing to help beta test the corexy functionality if that would help.
Thanks and look forward to the boards,
Tristan

A Former User

@dc42
Ok I understand.
For me it's no option to change the style of the x axis (double shaft nema17) I must work with an external encoder.
I'm happy to hear that duet will sell this board in the next months.
Would like to have a few of this little fun maker.
Please give us a sign when we can order some.
Thanks a lot
Richard

dc42

The first small production run of the EXP1HCL is currently undergoing testing by our assemblers. We should know more on Monday.

A Former User

@dc42
Sounds great!!!
Thanks for updating us

Cheers
Richard

samlogan87

I am keen to get two as well. I have the 48v power supply just need the boards now

A Former User

@samlogan87
what is the benefit of 48 volt?

cheers
richard