fox,
had same problem with my pump. do you still have the problem when the complete line is filled with water? I filled the hose wiht coolant with a "trechter" when I closed the end by folding the hose double and close it temporary with a t-rap. if you can place the resorvoir and pomp on a higher postition it should start pomping arround the fluid and get the air out.

Yes, I did a similar thing, but then it barely pumped round, bigger pump is on the way, but will be here somewhere next week. This weekend I hope to test it without spindle but with pen. Will post some progress.

WOHA ... I created a monster ... albeit an intellectual one :D

http://s29.postimg.org/klittb1hj/IMAG3317.jpg

http://s15.postimg.org/ybrsipcff/IMAG3321.jpg

http://s10.postimg.org/ubpgo1cw9/IMAG3316.jpg

Got led on my gantry, mister, traffic light, lasers, Z-brake, got air connections on all legs, plus sockets with 220 volt, all buttons work... basically, I got everything working .... except the spindle (well that runs as well, and I can control RPM etc, but as you know but I have no cooling ( better pump arriving next week) .....

So.... I opted for a pen (flipped the spring - for a cheapskate plotter )

It felt great to see it moving. Need to sort out all kinds of little details, but hey it works !!!

I AM OFF TO A CELEBRATION BEER.

Big thanks to Gerald for the design and to all of you for the advise and support.




Ps.

For an intellectual monster you need:

Brains (Leadshine AM882 drives, CPu5B EdingCNC Ethernet, DX 24 volt (5v ctrl) Relais board, Eding CNC BOB, custom built opto iso sensor interface, DamenCNC mist/coolant bob + Z brake bob)

http://s2.postimg.org/bqp1jpt6x/IMAG3072.jpg

Muscles ( custom 1000 watt 71 V toroid powersupply, 380V Siemens Micromaster, Meanwell 12 + 24 volt powersupplies, 24V contacters, 32A mainswitch, 16A and 1A circuitbrakers)

http://s29.postimg.org/bzbxl9ah3/IMAG3073.jpg

Happy times Fox...congrats!
Mark

Yay! :d

Veels geluk! Number time... :-)

Congrats !!! That Z-Slide is interesting. Can't wait to see it doing cool stuff. Your beast have logos on it ?

Congrats! A stealth build, well done. Dust very very soon by the looks.

Thanks guys, no... it has no logos and no paint yet.
Will look for a sign shop an cut some.
First cutting will happen when the new water pump arrives for spindle coolant, should be here coming week.. In the meantime I will use the pen to get settings and files prepared, and grow some confidence :)

Congrats Fox, Well Done! By-the-way you can run your spindle for a few minutes safely for a test cut, mach has the 'roadrunner' test file you can run under a minute.

Yeah I know, ( not using mach btw, but edibg has similair files ) but my instincts tell me its not bad to have to wait untill the spindle to double check everything. Already found some loose bolts here and there, adjusted gearboxes, greased my rack and pinion etc. So you all have to be patient with me some more ;)

Gefeliciteerd
 

Congratulations with your good looking machine. Is ashame that you have to disamble the whole machine for the paint job.

I'll survive, I planned it this way.
When you build a custom motorbike or car it's common practice.

Congratulations Fox. Those last few details can be the toughest. Now you can enter phase 2 and figure out how to run the software. Happy cutting!

Well Done!!

Yeah, mostly got that figured out, I have years in CAD under my belt, I just need to figure out some quirks in the Eding software here and there which have me puzzled, but finding correct cutting parameters and hardware for the range of materials will be a challenge for sure. But looking forward to that.

Yeah, it's never finished I know...
Still have to built Dust and Vacuum table ( have motors already in stock ) after it's cutting those will be some of the first parts of the machine ( after a bed for my little son, that will be the first ''real' part after al test have been finished.

Thnx Darren !

Congratulations, looks strong.

The motors are hot on 71Volts?

No... motors are 45 degrees ( on the outside, I have no means of temping the inside) after running 3d files for one hour. Plesse note air running - not cutting yet, so teh motors are not really pushed to their limit yet.
I listened to Geralds advice and exprience, because I want max performance out of my machine. There are many running lower voltages. There have been heated (:D) debates on this mattter, search the forum.

I need advice, what would you guys advise on setting my velocity and acceleration to considering my large table and my electronic specs (see thread)

My acceleration is set around 25 but the speed is set above 600 (can't remember exacts). I found the machine will beat itself to dead on direction changes if acceleration is much higher.

25 inches and 600 inches.. I assume ?? then I was already jogging above that :o.
I am in metric = velocity in mm/s, and acceleration in mm/s^2.

Go as fast as you can go :)

Start with 25 / 600 ipm ( 10 / 250 mm/s, right? ). Increase your speed until the motors stall during accel or decel. Tweak your accel down / up until the stall goes away, or drop the speed by 5% and tweak again if necessary.

Then, drop your speed by 15 - 20%, and test violently changing direction in x,y and diagonal and ensure no lost steps. There's your max speed. If you have lost steps, you may need to drop the accel a bit.

Let us know what you end up with. Always useful to have another data point.

Ok, I'll start playing.

There you go. That's good advise, when initially set up I just stopped adjusting thinking it was good enough for now, I too might go ahead and increase the speed.

Its good to write a short G-code commanding the axis to to go to-and-fro for the tuning
for Z-axis
G1 z0 F(desire speed in mm/min)
G1 z200
G1 Z0
G1 z200
G1 Z0
.....

Ah i was thinking, there must be a test program to do this. I found emc has it ( a program to find max velocity and accelaration).

Is this gcode you write (i am not familiar with programming g codes manually) something it could copy paste in notepad++ and save as, and run ?

Fox, pity you're not using Mach, there is an add-in called the Break In Wizard, it generates gcode to exercise the machine multiple times....

Fox, I don't write my own G-code per say, got aspire to do the hard labour. I reckon its always good to know the G-code well enough (or cheat buy having a g-code pocketbook) for occasional troubleshooting.
yes, you can use a wordpad or notepad to write one & save it with .tap extension for Mach3 & .ngc for Linuxcnc.

This one ? That would have been nice. Courtesy of a huge user base, Eding does not have that yet. But I will see if I can convert that for use with Eding CNC. I am glad to get rid of the parallel port and be running Ethernet though;).


@ Ken, yeah I know, let I was more asking if:

G1 z0 F500
G1 z200
G1 Z0
G1 z200
G1 Z0

G1 x0 F500
G1 x200
G1 x0
G1 x200
G1 x0

G1 y0 F500
G1 y200
G1 y0
G1 y200
G1 y0

is a valid G code file when saved, or do I need to add headers , closing brackets etc ? I am familiar with coding html, java and css not G code..

Yup, thats the one. Works pretty well, I used it on my previous machine.

I think I need a good test file. My values seem way too high according to advises ?

I had my machine set at X and Y @ 500mm/s vel and 250 mm/s^2 accel.
The Z is @ 195.3mm/s ( it made that number from 200 as input ?) vel and 150 mm/s^2 accel.

It jogs fine at these speeds, and it 'cuts' (writes) fine as well with some dummy programs.

Are you sure those numbers aren't in mm's/min?

250mm/sec/sec accel is about 1.5 G's, and is about 6-8 times quicker than the quickest home built machines.

https://en.wikipedia.org/wiki/Standard_gravity says 1G is 980 cm/sec^2. So 250mm/sec^2 would be roughly .025 g, but I could be off. (Changing units always got me in physics.)

My mistake. I was looking at his feedrate in mm/second, and multiplied the accel by 60 by mistake.

Let's try this again. I think that 500mm/sec is 30m/min, which is very fast. But an accel of 250mm/s/s is much too slow for 30m/min.

You are definitely on the right track.
I don't quite get what you meant completely. its an ASCII file if I remember correctly. damn, its been so long ago when I last did this., :p
I suggest you open a simple G-code for Mach3 & look for your answer.

Also,
1)its better to split the above mentioned G-codes into 3 separate files; one for X axis, one for y-axis & one for Z-axis. Its always advisable to tune one axis at a time, will save your sanity. :D
2) Should add plenty reciprocating strokes, the above codes only entails 2 strokes. IMHO, 20 strokes is barely enough.
3)Also, have a lot more strokes length in each test file, since you are building a 1.2mx2.4m table, you should have the X & Y strokes a lot longer, at least 1m & 2m strokes respectively.
4) have one hand on the E-stop when you start the G-code. :eek:

Its a great time for you to have an hands-on feel of what the speed & acceleration numbers entails. While you are at it, keep an eye on the raping time too (0 to full velocity) IMHO, 0.1sec should be fine, but don't cast this number on stone....

Thanks to all, will built me some proper test file, and slow things down before I try to built speed again..

Update:
Got my new coolant pump Sicce Syncra 3.0. It does the job perfectly. Shame it took over a week to get here, cause the place where I ordered it f*cked up big time on their side.

Then time ran out ... and I had to move my entire life (planned move to another nicer but old house) in 1 week.
Meaning absolutely no MM time (12 hour days painting, fixing etc.). Got the move that done (sortof, still surrounded by my life in boxes).

FFWD, to tonight. Pump mounted, tested everything, need some last (wiring) fixes and then..hopefully first cut this weekend.

http://s28.postimg.org/i70bsk5h9/start.jpg

http://s28.postimg.org/z3pekzd19/machine.jpg

http://s28.postimg.org/5pto5eabh/milling.jpg

http://s28.postimg.org/v9vybtvp9/result_1.jpg

http://s28.postimg.org/ua5ng4gjh/result2.jpg

Fixed my pump situ, considered waiting untill my Dust management was working for 1 second..nahhhh.

Just a piece of grabage mdf ( some holes we're already in it as you can see ), and my 6 mm two flute hss endmill could not pocket the entire letters (see H) cause they we're to small, but who cares.. IT CUTS.
Happy with the quality of the cut, have no idea if my feeds and speeds were any good.

Surface of the mdf (the top of the pockets) needed a light sand to get rid of fibers, but the inside edges of the pockets are like this straight of the machine. Each letter is approx 25 mm high and a little over 6 mm wide.

Before I do any more cutting my priority is now with cutting a working dustfoot :D

Well done!
Prioritize a working dust foot is very wise.