Retrofit Hardware

Lexan

Hi @ll

i'd like to retrofit an older Printer, with XY Closed Loop Motors with own drivers and Z Normal Motors, 2 Extruders and 1 Servo to change the height of the current running hotend.

The Hardware i selected so far is the following:
1x Duet 3 6HC
2x 1LC
1x Paneldue 7"
1x Duet 3 Tool Distribution Board

now my question is, can i control the Servo motor with 1 of the 1LC Toolboards or do i need to carrie the wire from the 6HC all the way to the servo?

TIA
Lexan

jay_s_uk

@Lexan depending on how much current the servo wants, yes

you also can't run external drivers from the 6HC so you'll want to look at the 1XD https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Expansion_1XD

dc42

@Lexan how much current do the Z motors need? If it's not a lot then the Duet 3 Mini would cost you less than the 6HC.

Lexan

@jay_s_uk wait, i cant controll an external Driver like an HSS57 with the 6HC directly ?
@dc42 if i found the correct datasheet, it should be around 15mA, the mini wouldnt fit based on 2A limit drivers

dc42

@Lexan you said they were "normal" Z motors, so I assumed they were bipolar stepper motors without drivers. Is that correct? If so then they need much more than 15mA.

Lexan

@dc42 no i ment 2 steppers, controlled each by one 1lc toolboard, and the servo that lift the current extruder is something similar like this https://www.sunfounder.com/products/25kg-high-torque-servo

Lexan

ah okay i get the issue, so this is an extra servo just for the hotend unit.
my plan for the z axis stepper drivers is to use the TMC5160 from the 6HC board

jay_s_uk

@Lexan correct. You can't drive an external driver using a 6HC

Lexan

@Lexan ah i see my fault, the 6XD can, right ?
Edit: just seen that make's no sense for my situation.

jay_s_uk

@Lexan yes, the 6XD can.
In the duet 3 family it's pretty much yet the 6XD or 1XD boards for each motor with an external driver

Lexan

@jay_s_uk okay this fix the problem that i didnt seen comming, but wont answer my problem i see comming
can i control the 25 kg servo via the 1lc toolboard ?
and if yes, wich port can i use?

jay_s_uk

@Lexan do you have a part number for it?

Lexan

@jay_s_uk said in Retrofit Hardware:

@Lexan do you have a part number for it?

i will check that out tmrw, just play with the idea to use a 3hc board instead the 2x 1lc

Lexan

@Lexan should be a DSSERVO DS3225

jay_s_uk

@Lexan said in Retrofit Hardware:

DSSERVO DS3225

I would say not. seems like it can pull up to 1.9A which is too much for a toolboard

Lexan

@Lexan any recommends how to controll this one instead ?
i think ~2A will be also too much for the 6hc

jay_s_uk

@Lexan it may well be. Best to just use a step down converter.
The control can still be from the toolboard or 6HC.

Lexan

@Lexan okay but then the control could also be from a toolboard, right ?
the way to the hotend is about 4 meters, so i would like to take the cables as short as possible

jay_s_uk

@Lexan yes to controlling from the toolboard. you'd either have to run a separate 5v cable or mount a stepdown converter on the toolhead