Dynomotion Forum

Update: Bumped acceleration down to 1e6 as suggested. Increased Jerk to 5e7 on all axis. Added 500 hz Q=1.4 Low Pass 2nd on Filter 2 for all axis. Found out that the mechanical slop sound in the Y axis was actually the guard slapping the frame from an untuned servo. Went through and re-tuned all axi...

Tom, thanks for the insight! That Trip States program seems quite nifty. 1) I will spend some more time with the J and A values. 2) Correct, my IIR screen has zeros across the board currently. Will get the 500Hz Q=1.4 added to FIlter #2. 3) I was actually thinking about adding some feed-forward! I h...

Tuning of the X axis, +/- 20 encoder counts speed set to 400 IPM if my math is correct. I am pretty happy with it. However, this being my first tune, if I missed something obvious let me know.

The X-axis is setup! Well, mechanically. With the motor wired just with power in a vice on the floor I attempted to setup the motor with the drive. Took a long time to get the software to connect. (Recieved an email back the next day from Copley support saying support was 'forgotten' for my series d...

Well, plans for the servo drives have changed drastically. Through some more researching, I have finally settled on some drives. New ones. Junus JSP-180-30 from Copley controls. 100% digital drive, 15 amps continuous, up to 180V DC supply voltage. They seem to offer some unique oppurtunities but I w...

The plan is to keep the DC servos and use Omron E6B2-CWZ1X 2000P/R encoders. For the drives, I was planning on using some Copley Controls AEM-180-18(Good deal on Fleabay). They would need a custom backplane made but offer some fun features like autotune. I do have concerns about amperage with these ...

2 years back I picked up a 1992 Fadal 4020; 28-inch Z axis, 10k spindle, DC servos. I had a cart full of Dynomotion boards but started making parts with a drip feed to the old CNC88. Present day: everything was going fine until my X-axis resolver started on the fritz. The cabling looked rough as wel...

Hey DiligentCNC,

Have you made any progress on this? Looking at doing the same on my 92 Fadal.

I was also wondering how much I would lose if I tried to run the dc servos with SnapAmp at 80V/ instead of 160V.

Does anybody know of a good Table C Gimbal B post-processor while I am at it? I don't. But its not clear to me why you need one. The idea behind the kinematics is that the GCode only needs to specify how to move the tool tip through space, and what angles the tool should be at. How that is achieved...

Just an FYI to others who may be reading this. Screenshot 2021-12-14 161740.png Code has been put in so that if there is a line in the Kinematics.txt about pivot-to-chuck length it will update the corresponding variable. This will be very handy in getting the system set up or whenever the spindle ha...