TEVO Little Monster Duet Ethernet Conversion

Cinpro · 29 Oct 2017, 23:48

You put it with the terminals right beside the BED power wires on the board right?

Also there is a Facebook group for this combo of printer and board; Little MOnster Duet WiFi Ethernet Users Group

Ak Eric · 30 Oct 2017, 01:32

You put it with the terminals right beside the BED power wires on the board right?

I'm… not quite sure what you mean by that . I have it wired up just like the pic here shows:
https://thingiverse-production-new.s3.amazonaws.com/renders/8b/40/85/43/2e/03e4de45ef0e423ff95199fd8deccd3b_preview_featured.JPG
The bed-out terminal is on the bottom right of that pic, and mine looks wired just like it.

I'll check out that FB group, thanks.

Ak Eric · 31 Oct 2017, 03:20

Just to follow up: The TLM kit came with an extra thermistor…. so I just tried plugging it into the bed instead: Now getting a temp reading that matches the hotend, only off by about .5c. Shot in the dark: Anyone know by chance what setting to use for it, if stuck on the bed? Since I presume this was a spare for the hotend, should I just dupe my hotend M305 settings? Currently have this, since I just copied what Emulsifide had posted:

[[language]]
M305 P1 T100000 B4138 C0 R4700             ; HOTEND :  Set thermistor + ADC parameters for heater 1
M305 P0 T100000 B4607 C8.950070e-8 R4700   ; BED : Set thermistor + ADC parameters for heater 0

number40fan · 31 Oct 2017, 03:53

I am sure the hotend and bed uses the same thermistor, so you should be safe copying.

Ak Eric · 31 Oct 2017, 16:40

Thanks: Swapping sensors, changing settings, heating it up, and testing with my IR thermometer, it's within just a few deg, so I'll call that a success.

dc42 · 31 Oct 2017, 17:14

I'm glad it's working for you. If you are using glass on top of the bed, then it's normal for the temperature on top of the glass to be 5C to 10C lower than the temperature you set.

Ak Eric · 18 Nov 2017, 19:35

@Emulsifide : Any chance you wouldn't mind posting the Simplify3D profile you've been using? I've been tuning mine, and slowly progressing with better results, but would like to have something to compare against.
Thanks!

Ak Eric · 18 Nov 2017, 23:28

@Ak:

@Emulsifide : Any chance you wouldn't mind posting the Simplify3D profile you've been using? I've been tuning mine, and slowly progressing with better results, but would like to have something to compare against.
Thanks!

I'll answer this myself since discussing this with him elsewhere: I totally forgot That S3D provides lots of default profiles, and they have one for the TLM. Derp.

Ak Eric · 27 Nov 2017, 01:44

General question (for Emulsifide or anyone else) : How did you come up with the numbers for the M665:
M665 R157 L397.1073 B175 H525 ; Set delta radius, diagonal rod length, printable radius and homed height
Specifically the L and R values? Was this based on the measurements of your machine, or did you actually find official looking numbers online somewhere?
Just wondering simply because my numbers based on measurements seem slightly different, I'm coming up with:
M665 R155.58 L395.416 B175 H525
Again, just wondering.

ExSerCo · 20 Dec 2017, 07:40

Hi people,

Alot of info I can find here

But I do have a question too.
I'm no expert in wiring (yet), so feeling uncomfortable right now.
Where can I find info/pics/schematics on how to cut/rewire the connectors for the Little Monster?
I've tried googling already, but I'm still confused.

Thank you

Ak Eric · 20 Dec 2017, 22:27

I listed some high-level notes from my conversion here, if they help:
http://www.akeric.com/blog/?p=4325#Assembly_Notes

A Former User · 2 Jan 2018, 05:59

Hi dc42 you wrote
"It's usually possible to convert 5V optical endstops to 3.3V. Identify the resistor in series with the IR emitter in the slotted opto switch and reduce its value by about 50%. If it's a surface mount resistor and you don't have SMD desoldering equipment then it's easiest to solder a second resistor of equal value on top of the existing one." Are you able to explain this in more detail. I have two optical endstops that are 5V that i need to turn into 3.3v. I read another article of your that I will need BAT43 diodes (which I have ordered) but can you show me an image or describe how this works please

dc42 · 2 Jan 2018, 08:54

If you convert the endstops to work on 3.3V then you don't need the diodes, they are for endstops that need higher voltages.

If you post photos of your opto endstops then I will try to help.

A Former User · 2 Jan 2018, 13:21

Sorry there not opto sensors, I meant to say proximity sensors.

https://imgur.com/FmQV2nM

dc42 · 2 Jan 2018, 15:59

In that case, assuming they are designed to run from 5V, you may need to connect the ground pin of the sensor to ground on the Duet endstop connector, the output of the proximity sensor to the STP pin of the endstop connector via the diode (cathode of the diode goes to the sensor output), and the +5V connection from the sensor to +_5V on the Duet. You can find +5V on the expansion connector. But from reading posts from other users, it appears that some of them got the sensors working on 3.3V.

A Former User · 12 Jan 2018, 15:36

But from reading posts from other users, it appears that some of them got the sensors working on 3.3V.
Hi DC42 can you tell me where you read that some people have got it working on 3.3V. I have read numerous articles on this forum and others but I can not seem to find those articles. If I stay with the 5V way that you explained above will I be able to have both the X and Y sensors hooked to the same 5V pin?

dc42 · 12 Jan 2018, 15:54

I thought I had seen users running these machines with the endstops powered form 3.3V, but perhaps I was mistaken. Yes you can power multiple endstops from one 5V pin.

mrac1 · 12 Jan 2018, 21:01

I've two TLM with the optical sensors on 3.3V, works fine.

dc42 · 12 Jan 2018, 22:04

Do some TLMs come with opto sensors and some with prox sensors then?

mrac1 · 12 Jan 2018, 22:50

I don't think so, at least I've never seen or heard this.