Help please. Dip switches and mach 3 settings

[Radu_Andrei]

Another thing that gives me a hard time, is that I have some ballscrew whip. It.s 20mm dia, and 1500mm long, one fixed and on simple end support. On the y axis, on the last 300-400 mm moving towards the stepper, I get some whip. At 3000 mm per min (118inch per min) it.s quite strong. Reducing the speed to 2200 (86) it is very little. I assume lowering to 2000 (78) will kind of fix it. I would prefer 100 ipm.

I found two ways of fixing that online. One is a spring support at the middle of the screw, that reduces somewhat the whip, the second is a change in design to make the ballscrew stationary, and rotate the nut (A LOT OF WORK TO CONVERT TO THAT).

Has anyone encountered this kind of problems, and what solution did you come up with?

P.S. Regarding the pictures with the cnc machine from post 204, please feel free everyone to post some photos with your cnc routers, especially those which used them for some time, as I.m sure you.ve updated your machine design to solve all or most of the problems. This includes you too, Rob. :) You.ve posted a photo with your beautiful limit switches, but I did not have the honour to see the entire cnc, and as you always seem satisfied with its performance, it is of paramount importance to my existence to see your cnc rounter. :)

[cropwell]

Regarding the pictures with the cnc machine from post 204, please feel free everyone to post some photos with your cnc routers, especially those which used them for some time, as I.m sure you.ve updated your machine design to solve all or most of the problems. This includes you too, Rob. :) You.ve posted a photo with your beautiful limit switches, but I did not have the honour to see the entire cnc, and as you always seem satisfied with its performance, it is of paramount importance to my existence to see your cnc rounter. :)

Don't think for one second, that I am satisfied with my machine. It is very 'entry level' A4 machining area, Unsupported rails, trapezoidal screws and delrin nuts but its' most damning feature is that it was made by MD. I have done what I can to stiffen up where possible without major rebuild. If you go carefully with it, you can get OK results.

As far as the inductive proximity sensors is concerned you need at least 12v, preferably more, for them to work reliably.

[Radu_Andrei]

Paulus v.
As I said it.s 3-4 meters away from the workshop. My newly built house it.s like 10 meters away. The construction authorization was released by the owner of the towers, in this case Enel, and the City Hall. If I remember right, the minimum distance required was 7 meters. I did not bribe anyone. It is just the way it is. I do not hear any hum, but I.m quite sure they work all the time. I am not sure, if the are high or medium voltage power lines. My cnc works fine now after fixing the grounding. There is still room for improvement though.

As for the health issues, this electrical tower is here since my grandfather was young, and no one in the family had any serious health problems, and counting aunts, uncles and cousins, it is a big family.
There are people here alive which worked in the uranium mine, and they are alive today, and hardworking strong aparently healthy men that died of cancer. You have 60 years old smokers that do just fine, and 3 years old with leukemia. So, excuse my scepticism toward the recomendation of the experts, but they miss something. I am NOT saying that care and resposability are of no use. In fact they are great and make your life a lot better, but I would love to see for once, attached to a claim (regarding anything, health, nutrition, cancer, electromagnetic radiation etc) to see the study behind it, and I mean place, date, names of the people involved, telephones, emails, experiments, conclusions, reports etc. This is not a reply pointed at you, it is just about a principle. The scientific method principle. First let.s prove it, and then share it. :)

Sorry for the long reply. A couple of years ago, I did a personal study about nutrition and health, mainly about what foods should you eat, why, in what quantities, and listening and reading all the sides involved in the debate, these including vegans, vegetarians, frutarians, raw eaters, only meat, no meat, no grains, no eggs, no legumes etc, It lasted a few months and in the end, I guess the only safe way is to go out and chew grass, or eat nothing. Very little studies existed for all this claims. Anyway, if my health goes bad anytime in the future, I will keep you posted. :)


Rob.
An MDF, A4 machining area, Unsupported rails, trapezoidal screws and delrin nuts machine that works, it.s better that a fancy one that does not. And better than all is the attitude. I honestly though you have a high end hiwin rails, high pitch ballscrew, or tensioned double pinion and rack, 2.2 kw water cooled spindle, aluminium extrusion frame, vacuum table machine. All the bells and whistles. Perhaps more than a better machine, I need a better attitude towards it.

I just finished this evening installing the homes, and they seems to work just fine with 12v supply. I will however post a video these days, with the aparently last problem :)) (I know, don.t laugh), of the y axis wobble, or whip, I am not sure yet, maybe you see something I don.t. It.s not that bad and it is manifesting a bit strong only on 10-20 cm of travel.

My little mistake, is that seduced by the almost great functioning of the machine, I did a few works and sold some, and now the interest is quite big, especially for religious carvings, and I get a bit of pressure from the people in the area, and I cannot deliver. Not yet. Until I figure out if this whip is something that can ruin a ballscrew very quickly or it is not a big deal. 20mm 5mm pitch, one fixed one free end, 1500mm (4.92ft) long. We shall see.

[Neale]

My X axis ballscrews are also 2005, about 1.7m long, and fixed/floating bearings, so it's a very similar setup. I do not get any significant whip below 4.5m/min which is my max stepper speed (around 900RPM). You do need to make sure that everything is very carefully aligned. That is both bearings and ballnuts - these must be bolted to a surface that is exactly at 90deg to the ballscrew. If anything is slightly out of alignment it can encourage whip, even if it seems to turn OK at lower speeds. I tried to include as many adjustments as I could so that everything could be aligned on assembly. This took some time, but it seems to have worked OK. Don't know if this helps or encourages you, but it shows that your setup can work very well with a bit of setting up and adjusting!

[cropwell]

An MDF

Let me correct you, it is worse than MDF, it is an aluminium frame by Marchant Dice It has a Kress router.

[Radu_Andrei]

Rob. I still don.t get why you seem so happy about the Kress router. I assume yoga might be your secret. :))

Hi Neale.
Truth be told, for the y axis I kind of hoped for the best in the setup. I tried some techniques I found online to align the rails, and the ballscrew, but it seemed to not work so well as advertised, so in the end, I just did a feel run, like aligned one end of a rail, than bolted that, that the other one, and used some shims to adjust any issue, and when it felt like it was running smooth, I mounted the ballscrew, in the same manner. One end first in one plane, them attached a pice of rod to the coupler, and turn it with the tips of my fingers, and bit by bit, fixed all nuts until I could turn the ballscrew with the tips of my fingers for the whole 1420mm run.

With other word, beyond the language barrier: I have no clue what I did from a technical perspective. It just felt good enough. So could you please guide me towards a reliable way or alligning the y axis rails and ballscrew. :)

[Clive S]

Rob. I still don.t get why you seem so happy about the Kress router. I assume yoga might be your secret. :))

The secret was in the MD bit. It is a good bit of sarcasm from way back.

[cropwell]

Rob. I still don.t get why you seem so happy about the Kress router. I assume yoga might be your secret. :))

If I told you my secret, it wouldn't be a secret any more. There is nothing wrong with a Kress router, but it is noisier than a spindle and VFD. They are good quality, but my next build will have a water cooled spindle.

[cropwell]

Your carving lack of detail at the bottom edge, looks as though the wood was not set level to the XY plane. So I would check the bed is parallel to the X and Y axises.

[AndyGuid]

. . . . .

I am NOT saying that care and responsibility are of no use. In fact they are great and make your life a lot better, but I would love to see for once, attached to a claim (regarding anything, health, nutrition, cancer, electromagnetic radiation etc) to see the study behind it, and I mean place, date, names of the people involved, telephones, emails, experiments, conclusions, reports etc. This is not a reply pointed at you, it is just about a principle. The scientific method principle. First let.s prove it, and then share it. :)

Sorry for the long reply. A couple of years ago, I did a personal study about nutrition and health, mainly about what foods should you eat, why, in what quantities, and listening and reading all the sides involved in the debate, these including vegans, vegetarians, frutarians, raw eaters, only meat, no meat, no grains, no eggs, no legumes etc, It lasted a few months and in the end, I guess the only safe way is to go out and chew grass, or eat nothing. Very little studies existed for all this claims. Anyway, if my health goes bad anytime in the future, I will keep you posted. :)

:

Agree with you 100% Andrei, I am totally sick of hearing "The evidence shows . . . . . " going unchallenged!!!

Downunder "they" have a thing about MSG, which to me is the best thing since sliced bread so I use it whenever necessary.

Where's the friggin evidence?

Similarly, I've been deprived of eggs and butter for so many years because of "their" hysteria!