Advanced Search

I still don't understand why the US made it so complicated. Here in .AU all we have is  single phase 240v (which Is slowly getting watered down to 230v or even 220 v to match some overseas countries) and 415 volt three phase. 3 Ph circuits can have an optional neutral wire and you get 240v from any phase and neutral. 380v I think is allowed but some people recommend using a transformer if running 380v machines. 

Nice Choice. It evens support IEEE1588 Precision Time Protocol that is behind TSN (Time sensitive networking),
One day , we will have Ethercat slaves and possibly even Mesa FGPA's that support TSN

Hi, i have a geekom a5 with amd ryzen 5 running linuxcnc - debian 13 rt and a mesa 7i69s. after setting the mesa to 10.10.10.10 and the mini pc to 10.10.10.11 i got stable connection with reliable ping. however the latency is way to bad for linuxcnc. i already set isolcpu and others in grub but without success. no i am preparing to get into advanced bios. does someone know the settings to bring me foreward. thank you

Thanks. 
Where are you planning to install an encoder in the spindle drive?

tommylight wrote:

Europe, so you do NOT have 3 phase 230V, you have 3 phases where each has 230V exclusively when used in conjunction with neutral. Otherwise, you have only 3x380V.

 

Sorry to hijack this discussion
That makes sense. Finally!... that solves a question that has mystified me a long time. Why 380V? Well, it does make sense.

Here in US we have everything except  380V:

(1) We have 1 phase 120/240V with two lines 120V to neutral or 240V between each other.
(2) We have 3 phase 480V with 277V to neutral and 480V between each other.
(3) We have 3 phase 208V with three lines 120V to neutral and 208V between each other.
(4) We have 3 phase 240V with 120V to neutral on two lines, 208 to neutral on the third line, 240V between any two of all three lines. This kind of service is hardly installed new anymore, but still exists. Used to be quite popular with just two transformers, they actually skipped the third transformer. It is actually an extension of (1) above by adding one transformer on the power entrance.

Listed in order of popularity among my current customer base.

justincase79 wrote:

With regards to ethercat vs mesa it looks to me, based mostly on forums posts, that the mesa route is safer, more tested and less potential problems, does that sound about right?

Yes, EtherCAT is easier to wire in and that is pretty much where the fun stops. It is a very nice idea implemented ...not good.
And, yes i will order some cheap EtherCAT drives and play with them, gladly, but i have to order through friends abroad and wait ... and wait...

justincase79 wrote:

Main problem is they require 380v, 3-phase and 17kW of it... A bit more than I have available in my garage. So the plan is to reduce the power somewhat (especially for the 10kW spindle motor), given the machine is only going to be used for hobby projects, and get it to run at 230v 3 phase.

Europe, so you do NOT have 3 phase 230V, you have 3 phases where each has 230V exclusively when used in conjunction with neutral. Otherwise, you have only 3x380V.
That is something i have to deal with at least once a week here as some smarta$$ yanked a motor from a machine and plugged it in the 3 phase socket and of course that ends up in smoke pretty quickly. About a month ago checked a board from a Tesla car charger that went up in smoke here the instant the fuse was flipped up.
In general, anything that says 3x230V but does not use neutral, do not plug in EU 3 phase sockets.

Dear meister:

My English isn't very good, so I don't know how to say thank you. Please forgive me.



Tim

Network card recommendation.

Super cheap and works perfectly. Just for info.
it was plug and play with intel driver.

2.5Gbps Intel Chip Single Port Ethernet Network Card I226 Chip PCIe x1 2500Mbps Gigabit LAN Adapter for Desktop PC Server - AliExpress 7

Final update after a nights sleep it took only few minutes to fix I removed the negative values in the ini file and tested travel direction to correct it I then swapped a couple of motor connections the retested and directions where good then uncommented limit switches in INI and all working great all in took less than 10 minutes...I went down the wrong rabbit hole yesterday...thanks for your help.

The spindle motor is not implemented into the machine configuration, yet. All the legacy contactors and time-relais for controling it will be decommissioned soon and the Danfoss VFD will fully control the spindle motor. We did however already pull a shielded motor power cable which is necessary for VFD driven motors. While pulling the cable through the cable sleeve, we found another broken cable that seemed to have been damaged a long time ago – it was the cable for the spindle motor brake. The brake still works, so everything good there. For the spindle brake a new cable was added and thats where the retrofit stopped like ~2 weeks ago.

We plan to reuse the original three-phase induction motor and gearbox, paired with a VFD. This setup allows us to seamlessly adjust the speed from 0 to approximately 4000 RPM while retaining the torque advantages of the gearbox. We intend to use your LinuxCNC component to control the gearbox. However, the logic for calculating the optimal gear, executing the shift, starting the spindle, and handling all subsequent speed adjustments (must be managed by the VFD) has to be programmed. With this approach, I am very confident that the Maho will be capable of rigid tapping for large threads.

As soon as i visit my parents again, i will further work on the Maho. I hope i will get the homing working soon - pretty new to LinuxCNC HAL and slowly getting used to it.

many thanks again

fixed in main/dev

I recently made a modification that only copies the modifier files to the Gateware directory when necessary,
but I didn’t realise at the time that some of the filenames are slightly different (debounce -> debouncer.v / pwm -> pwmmod.v)

Thanks guys, got it working and after playing with parameters it feels quite workable.
The joystick is one of the ones with a button so may look at using it for fast/slow jog

Will post full file once finished

It is interesting to see your mod. It looks like you have kept the original spindle motor and gearbox control. Did you use the gearbox Comp my mate created for the 400E, or did you roll your own?

github.com/jin-eld/mh400e-linuxcnc

Thanks for the feedback I will try again .

When I bought the machine it would not boot, with a bios battery error message, so the original computer is probably dead, but not really a big loss... But the machine was working fine the last time it was used, a couple of years ago, according to the seller, so the original Indramat drives and motors are probably fine. Main problem is they require 380v, 3-phase and 17kW of it... A bit more than I have available in my garage. So the plan is to reduce the power somewhat (especially for the 10kW spindle motor), given the machine is only going to be used for hobby projects, and get it to run at 230v 3 phase.

With regards to ethercat vs mesa it looks to me, based mostly on forums posts, that the mesa route is safer, more tested and less potential problems, does that sound about right?