Best posts made by meeloo

Hello,

I have installed and configured a new kind of automatic tool change from RapidChangeATC.com . It's a very smart and very simple/cheap system and enables hobbyists to have an ATC for a fraction of the price.

Adapting it to the Duet implied to create a number of macros and configurations as we need to be able to control the speed of the spindle, as well as the direction (forward and reverse). I used the regular method of hooking up a PWM to Voltage converter in between the duet and the VFD. To control the FWD/REV direction I used an I/O port to switch a relay that is then plugged in the VFD's digital control pins. I also have configured an XYZ probe to be able to easily setup the work offset, as well as a static Z Probe to update the tool length after each tool change.
I had to adapt an existing fusion 360 post processor to have everything work perfectly and it's now great. I have done a couple of jobs with it and it performed fine!

I put my full config (based on a work bee, adapted to my UltimateBee, spindle and VFD) + post processor and some 3D models on a GitHub repository https://github.com/meeloo/Duet3Config .

I'll try to post some more videos showing the machine doing some tool changes on YouTube, here is one showing a couple of tool changes during development https://youtube.com/shorts/bFGX5Maj3ng?feature=share

@Stout said in Reference to Dozuki.com - does not exist:

Would it be very difficult to make a batch rename of all dozuki links in the database? I mean everytime I'm searching for something and entering a thread about it there are loads of links do dozuki which of course is broken. Most of the old comments in the Duet3D Forum refer to dozuki which is quite annoying.

I agree that this is not a great situation and a mass renaming would be good if at all feasible. I can't count the number of times I searched for some subject in the forum only to find references to dead links. It made my experience truly horrible when setting up my machine...

@moe-adams9093 If your VFD is similar to mine (typical huanyang VFD...) the forward and reverse pin on it need to be shorted, not sent a signal like you are trying to do with the outputs. For that to work you need to use a relay with the duet output on the command side and the VFD DCom + For/Rev on the other. I used this kind of relays: https://www.amazon.fr/gp/product/B07BVXT1ZK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and it worked fine for me. Also as there is two outputs (one is NC and the other NO) you don't need to use two outputs on the Duet, you can use just one and write the NC to FOR and NO to REV (or the other way around, I don't remember which one I did, but it's an easy fix).

To control the speed I used a PWM to 10V converter that is plugged to the VFD output of the duet.

My Duet spindle configuration then looks like this:

; Define the Spindle VFD
M950 R0 C"vfd+nil+io4.out" Q2000 L0:24000 K0:1 

(the vfd output sets the speed, the output 4 sets the direction).

It took me ages to find the correct setup but now it works beautifully.

PS: I'm on a Duet3 6HC, so there may be differences to what you use.. You can see the rest of my config with a rapid change ATC here: https://github.com/meeloo/Duet3Config