Centroid Community CNC Support Forum

Just starting an OmniTech router retrofit. Features include 8 tool rotary tool changer, 9 drill vblack, 10hp 24k rpm spindle, 3 hp vdrill. Vacumn holddown, toolsetter, handheld pendant with 10 pushbutton control, and MPG.
Using Centroid Oak, three ADD1616, DMM DYN4 servos 1.8KW 130mm frame size. Will document challenges as I go.

That will be a very interesting build....
Do keep us posted.
Thank you!
Marty

More pics

Two things I learned. Definitely use a Line reactor for the DYN4 drives. One large enough to handle all 4 is OK.
If you don't have a counter balance on the Z, use a regenerative resistor on the drive. I ran into this when I recently did a FADAL TRM retrofit. Both solved an alarm I was getting.
Stephen at DMM is pretty knowledgeable and helpful when it comes to this.
I assume you purchased the Oak to DMM Data cables from DMM? Worth every penny....

Best if luck in the build!
Marty

I will order the line reactors, I already have the 8 filters. My router has a ratcheting type pneumatic brake for Z axis, so are you saying DMM are sensitive to heavy z lifting at initial movement? Counter balance piston may be tricky to mount..humm thanks for feedback.

repauli1 wrote: ↑Mon Feb 01, 2021 10:08 am I will order the line reactors, I already have the 8 filters. My router has a ratcheting type pneumatic brake for Z axis, so are you saying DMM are sensitive to heavy z lifting at initial movement? Counter balance piston may be tricky to mount..humm thanks for feedback.

ONE large line reactor is OK
You may not need the regen resistor. You can add it later if needed. The drive can always accept it.

Before you get too far along, you might want to consider installing a larger electrical cabinet.

You want to be able to easily see and reach all your connection terminals. Having components layered on top of other components, or components on the side walls and floor overlapping components on the back panel, will make installation, service, and troubleshooting unnecessarily difficult.

If possible, you want to allow 1-1/2" or 2" between components and the wire duct that serves them. That makes terminal access easier, and makes the wire routing neater since wires do not have to leave a terminal and immediately make a sharp bend just to get to the nearest slot in the wire duct.

Thanks, I owned a ul508a panel shop/automation business for many years.. I hear your thoughts

Progress report, installed Z Axis servo today, milled, drilled, rigid tapped mounting plates for EMC/EMI filters. They do have a terminal for a neutral, and the machine does not have a neutral. Need to contact tech support and find out if it can be omitted. Anyone know?

Is it a neutral or earth terminal? Sometimes they provide an earth for conducting away stray current induced into the core.

If it has a pair of neutral wires in/out there should be no reason they need to be connected I wouldn't think. They should probably be insulated to ensure they cant be touched as may possibly have some voltage induced on them. A line reactor is essentially a big common mode choke. Really important that it has balanced current in it. I.e. Don't feed some part from two different line reactors. The exact current that enters the line reactor must exit through it for it to be effective.

Your install works looks really good. Looks like it will be a pretty capable and grunty machine!