Search:

Hey Craig

Thanks very much for your input.

The Panasonic drives are mcddt3520. From memory they can use analog velocity & torque, along with stop/dir pulse input, so any controller should work....

Fast forward almost 6 months and sadly no progress. Still looking for a controller, hoping to get some feedback from anyone who has done a similar retrofit and what controller they went with.

I...

Not sure why the double post, can the mods delete this thread please?

Hi Ashfaq.

The number you are after is 08036020. Are you able to send me the machine wiring diagrams?

Please let me know what controller you would recommend - what are my choices and costs?

Hi all

A friend of mine is looking to buy a CNC router and he has come across a large Flexicam machine.

Machine size is about 5m x 2.5m, weighs 4000kg.
4m x 2m Vacuum grid bed with 2 x 10kW...

Hi all

A friend of mine is looking to buy a CNC router and he has come across a large Flexicam machine.

Machine size is about 5m x 2.5m, weighs 4000kg.
4m x 2m Vacuum grid bed with 2 x 10kW...

To be honest, I'm not worried about the Arduino's accuracy sampling the volts. As I said in my original post, if I elevate the steel off the slats, the arduino will reliably keep the torch within +/-...

Oh, I wanted to mention it looks like you've got your table sorted with Linuxcnc. I wanted to go down that same path and recall following your thread on the Linuxcnc forum a while back. I got as far...

I set the voltage using the App that came with the THC (or I can do it on the modified Mach3 screen). The arduino samples the voltage and issues up or down commands as required. Below is a screenshot...

Thanks for the reply Rod.

It's definitely not the Everlast. I have 2 of them and they both do it. I also have a Hypertherm Powermax 45 and I have been using that lately, but the voltage behaves...

I thought I covered everything but remembered to add that my compressed air is very dry and using worn or new consumables makes no difference.

I built a CNC plasma table several years ago and have been using it as/when required. It's a pretty basic setup, Mach3 on a Win XP Dell PC with an added PCI parallel port, 2 x BOB's, 4 x HaoyuTB6600...

Hi Tom

I pushed on each axis lightly and the noise stopped, so you were right, the noise I could hear was indeed dithering. It was noticeable due to the silence, but when I plug the spindle cable...

Hi Tom

Thank you again for taking the time to spell things out. If I see/hear any instability I'll drop the gains.



No, I read that article, mine are sitting still. Occasionally 1 count of...

Hi Tom

Feels good to be making progress.

In regards to oscillation, I did as you said and reduced all gains by 25% but couldn't see any improvement, if anything the error became larger. I also...

Hi Tom

Apologies for my frustrations. I guess the purpose of the video was to show you that I'm not sure how I can increase the P & D gains much higher than what they are now. Unfortunately I...

Hi Tom

Here's another one, I think it's better.

https://streamable.com/k7w6c

Also, below are the settings I found to be the most reliable. I could do moves of any size with no instability.

Hi Tom

Just concentrating on the Y axis, I reset the filter to 500Hz and reduced the PID and started again. I had to increase Max Following Error to continue.

Please have a look and tell me...

Hi Tom

I worked my way through determining max V, A and J and have used numbers about 20% lower to do the plots for both Z and Y axis. I tried moves from about .5" to 30" on the Y axis, and 1" and...

Hi Tom



Yeah, I mistakenly wrote "motion profile" settings but I meant PID, etc. Anyway that's exactly what I was asking and you answered it. Again thank you for clarifying.

Hi Tom

Thank you again. I recall reading D should be between 2 - 20 x P. I found that any increase of D would just cause instability in output. I'll have another go and make a short video where...

Hey Ben

You are correct, I don't understand which is why I asked for help. Also, I'm used to working in mm, and now find myself having to deal with counts and inches which isn't helping.
...

Hi Tom



How small, like 0.1 inch or 2000 counts?

Getting back to the tuning, I found that it's not possible to increase the P over .8 and both D & I seem to have little positive effect on...

Hi Tom

Thank you for the clarification re Output. Every one of your explanations and analogies help a lot.

I read through the few pages and there is definitely good info there. It was very late...

Hey Tom

Don't worry about the links, I just began on page 2 and am reading from there. Lots of useful info already, and I haven't even reached the motor tuning stage yet.

Hi Tom



The link goes to the part where he is tuning his spindle. Maybe it's the same principle, but I couldn't see any plots there and reading down the page nothing seemed relevant.


...

Hi Tom

Thank you for confirming that tuning is my next step.

I had come across those both of those threads during my searches, but hadn't read them thoroughly.

The first one still appears...

Thank you, but looks can be deceiving :)

Truth is up until now, I have had some idea of what I'm doing. From here on in, I'm venturing into the unknown....

I have a Flexicam router that stopped working. It appeared that one of the I/O boards had failed and it would get part way through the boot sequence, then just hang.

Although the router was less...

Wow, that was a long time ago, but yes, it was the relay that was causing it.

On the din rail, I have an Omron LY2NJ DPDT 10A 24v relay that is switched by the gecko. It simultaneously does 2...