New build with recycled parts on a ridiculous budget 120cm*60cm work area

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Originally Posted by Nickhofen

As Robert said ,down cut bit, slower feed and............ put self adhesive tape at the side you cut, after the cut remove it and you will have a cleaner cut.

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Good advice this was very old oak I tried a newer bit today didn't tear the same but still not perfect.

Just bit the bullet and bought a hardware step generator a Mesa 5i25 as my pc's not giving me the performance I can get out the machine.

https://www.ebay.co.uk/itm/272930377353

Plugs into the breakout board so no need to rewire which is good ;) I was in Vilnius last year I could have collected it lol.

This will generate more pulses than I could ever need it expands the BOB connectivity considerably but it's the pulses I can about, it can be linked to encoders for other funky stuff.

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Plugs into the breakout board so no need to rewire which is good ;)

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What do you mean by this? This will plug into your PC PCI slot but then you will need a bob like a 7i76 if you just use a standard BOB you will still only have 5 inputs and the opto's will no doubt be slow.

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Originally Posted by Clive S

What do you mean by this? This will plug into your PC PCI slot but then you will need a bob like a 7i76 if you just use a standard BOB you will still only have 5 inputs and the opto's will no doubt be slow.

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https://forum.linuxcnc.org/38-genera...nerator#106403

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Just remember most cheap parallel port breakout boards are not designed to be able to handle the speed potential of hardware step generation. They often have relatively slow optos, not a problem with a slow parallel port, and shouldn't be with an ordinary step motor config (unless your using really high micro stepping and spinning fast). But it can be a problem with high resolution step/dir servos.

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So we shall see I guess I'm only using 8 (maybe 16) microsteps with nema's. Not worried about the other inputs at moment but at some point I will get a daughter board for it and if I find speed is an issue that will be sooner than later lol. I assume I can set the khz within a certain range for each axis? If I can run at 50khz per axis I'll be more than happy for now.

Am I doing my maths correct?
8*200 steps *20 (revolutions in 1m) * 2 pulses per step=64000 pulses/metre
I want 10/min it would be 64000*10=640000khz then divide by 60 == 10666.66 khz per axis

Good thing about mesa is their upgradability.

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This will generate more pulses than I could ever need it expands the BOB connectivity considerably but it's the pulses I can about, it can be linked to encoders for other funky stuff.

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I do read all your post on the other forum as well. But you will need more inputs if you are using encoders and dual homing etc. The beauty of the 7i76 is that you will have differentials output for the step gens and 24v inputs etc.

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Originally Posted by Desertboy

Am I doing my maths correct?
8*200 steps *20 (revolutions in 1m) * 2 pulses per step=64000 pulses/metre
I want 10/min it would be 64000*10=640000khz then divide by 60 == 10666.66 khz per axis

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20 revs = 50mm pitch surely not.??

Khz = (steps per unit * velocity in units per minute) / 60

So Break it down into mm units not meters. So lets work on 10mm pitch with 1600 micro steps.

1600/10=160 steps per mm

160 x 10,000 mm/min= 1600000 /60 = 26.666Khz

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Originally Posted by JAZZCNC

20 revs = 50mm pitch surely not.??

Khz = (steps per unit * velocity in units per minute) / 60

So Break it down into mm units not meters. So lets work on 10mm pitch with 1600 micro steps.

1600/10=160 steps per mm

160 x 10,000 mm/min= 1600000 /60 = 26.666Khz

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https://www.youtube.com/watch?v=6NXnxTNIWkc
LOL that's why I need to check it was having a blonde moment ;)

https://www.youtube.com/watch?v=6MT3CihStFQ

Life is like a box of chocolates, some bastards been in it before you and ate all the good ones leaving you the strawberry creams lol ;)

https://www.youtube.com/watch?v=gxM5SazF558
Hmmm I have a PS3 pad kicking around wonder if I can get it to work over bluetooth.

Cool!

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Originally Posted by Nickhofen

Cool!

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You can do the same thing in Mach 3, not as good as an MPG of course but if you have a pad kicking round better than nothing for free.

Any linux (Or windows if using Mach 3) compatible gamepad will work.

I will try it , I have a wireless one from Logitech laying around!

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Originally Posted by Nickhofen

I will try it , I have a wireless one from Logitech laying around!

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Mind you at this price I'm very tempted works with both mach 3 and linuxcnc ;)
https://www.ebay.co.uk/p/Wired-USB-H...b04/2126489952

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Originally Posted by Desertboy

Mind you at this price I'm very tempted works with both mach 3 and linuxcnc ;)
https://www.ebay.co.uk/p/Wired-USB-H...b04/2126489952

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Have been oogeling this before.. wonder if it works well with uccnc?
And how long usbcable I can use reliably ;)

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Originally Posted by Desertboy

Mind you at this price I'm very tempted works with both mach 3 and linuxcnc ;)
https://www.ebay.co.uk/p/Wired-USB-H...b04/2126489952

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Where do you read linuxcnc in that link?

[deleted]

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Originally Posted by Clive S

Where do you read linuxcnc in that link?

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Nowhere it that link but I was looking for a pendant on linuxcnc forums and this one is mentioned so I bought one £60. If you google linuxcnc pendant this pendant is the first hit.

https://www.youtube.com/watch?v=5ctgaMqp3tk

http://linuxcnc.org/docs/html/man/man1/xhc-hb04.1.html
http://wiki.linuxcnc.org/cgi-bin/wik...ss_MPG_Pendant

There's quite a few threads on both the wired and wireless version, linuxcnc has had native support since 2.6 for this pendant.

I bought from this seller
https://www.ebay.co.uk/itm/CNC-3-Axi...4383.l4275.c10

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Originally Posted by Nr1madman

Have been oogeling this before.. wonder if it works well with uccnc?
And how long usbcable I can use reliably ;)

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It comes with 5m cable which is enough for me.

I suppose I really should wire the VFD to the BOB so I can control it from linuxcnc, the main thing for me is turning the spindle off when it's done.

So I can drink tea and smoke cigarettes ;)

https://www.youtube.com/watch?v=Bg1di8sGxWc

5m. .. that works for me too...
Didn't think usb was reliable at that length :)

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Originally Posted by Nr1madman

5m. .. that works for me too...
Didn't think usb was reliable at that length :)

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5m is the max length for reliability so I guess that's why they went with it but you can buy a wireless one from china for £5 more if I'd seen this yesterday I would have bought it but I don't really care either way I have a habit of losing things so wired is probably a good thing lol. The one I bought is coming from UK so will have it next week.

https://www.ebay.co.uk/itm/2-4G-Wire...s/131239063971

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Originally Posted by Desertboy

5m is the max length for reliability so I guess that's why they went with it but you can buy a wireless one from china for £5 more if I'd seen this yesterday I would have bought it but I don't really care either way I have a habit of losing things so wired is probably a good thing lol. The one I bought is coming from UK so will have it next week.

https://www.ebay.co.uk/itm/2-4G-Wire...s/131239063971

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Another thing that needs charging is not always good either.. If I order myself something like this it will have a cable :)
But I think I will try xbox 60 or psu controller first.. have those laying about!
Wife and kids will be away week 11 so I'm hoping, dreaming and drooling about the oppertunity to maybe get time to see some movement from my roaring router :D

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Originally Posted by Nr1madman

Another thing that needs charging is not always good either.. If I order myself something like this it will have a cable :)
But I think I will try xbox 60 or psu controller first.. have those laying about!
Wife and kids will be away week 11 so I'm hoping, dreaming and drooling about the oppertunity to maybe get time to see some movement from my roaring router :D

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Are you using Mach 3?

A disadvantage of the HB04 controller is it works in user space in Linuxcnc (Or windows) so if the PC crashes you lose control I believe if I have an MPG interfaced to the Mesa board I would still have control after a crash. Won't affect my stop button which I'm wiring so when pressed it knocks out the toroidal transformer and spindle as well as firing a software estop.

That way if the pc has crashed I still lose power to the steppers and spindle.

I need to make the cable to talk to the AM882's I did make one but lost it, I want to set the stall protect to NC.

I found it £10 cheaper from China not going to cry too much lol

https://www.aliexpress.com/item/CNC-...764949005.html

but £50 is even more tempting

Mesa 5i25 is already in UK and out for delivery ;) That was quick, need to dig out a pc to fit it in now so I can recover the fusion 360 pc to always boot windows and put it in a heated room, with a table, chairs and most importantly a kettle lol.

Once fitted, I will change the ballscrews to 10mm pitch all round and upgrade the nema's to 3nm (or 4) I'm also going to add 2 pieces of angle steel ground flat to the gantry.

Add a home switch for the Z axis and I think I'm pretty much done with Betty so I can actually use her lol.

Just inside a year, next build will try to be a bit quicker lol.

My package just arrived with the 5i25 but I was driven home by the cold it's below freezing where the machine is it's just too bitter at the moment to be setting stuff up.

https://www.youtube.com/watch?v=Zi1pkuyO9Po

Seriously cool

Attachment 23853

;)

Hmm what we have here?:very_drunk:

Tap tap,gouh anybody there? Did you put the card in you pc? Any reports? :P

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Originally Posted by Nickhofen

Hmm what we have here?:very_drunk:

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It's a 5i25 PCI card for step generation in Linuxcnc it plugs into PCI slot on the motherboard and then to a standard parallel port BOB so it should be easy to setup with my existing system, you can buy add on breakout boards for the 5i25 so you can get better performance, even servo control. Basically this card gives you 2 parallel ports outputs with go faster stripes lol.

For now though will use with my cheapo BOB, my handwheel came today as well but still flued up been off work all week hopefully will drag myself in tomorrow morning to play.

http://store.mesanet.com/index.php?r...&product_id=55

From what I read on linuxcnc forums this setup should be able to run 50khz per axis no worries which is good enough for me the actual card can get generate mhz per axis but my BOB is the limiting factor also AM882 have a max of 200khz input.

Have you thought about control yet? If you want to try Linuxcnc you can boot it in a Virtual Machine and run it in simulation mode to have a play. Sure Mach 3 must have a similar mode.

More than once I thought about a DDCSV standalone controller but dual homing and the fact that linuxcnc is a very mature, professional environment controller that has over 2 decades of development it's just a no brainer but I want a production machine this year (Either buy one at auction or build one)

In hindsight what I should have done is hooked my reprap 3d printer to the PP BOB and played with my printer from linuxcnc when I was building the router after all it doesn't mater if you crash the printer into itself lol.

another cheap/free way to get control
https://www.youtube.com/watch?v=egdhA2PBF54

Nothing is ever easy grrr, the 5i25 is not working PC won't boot when it's fitted gave up for today as no spare desktop pc to play with but will try another machine but the pci slot definitely works as I had a parallel port card fitted before and working.

from the linuxcnc forums

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There are certain motherboards (maybe about 1/2 a %) that the 5I25 will not work in

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somehow I just know I have one of those 0.5% of motherboards lol hpefully so then it's an easy fix tomorrow when I'm warmer.


The HB04 also came and 4 spindle nuts
Attachment 23869

Took 5 seconds to connect the hb04 to the test program that comes with linuxcnc and everything works fine, wheel, buttons, etc. But I cannot for the life of me work out how to make it work with linuxcnc itself getting all sorts of errors but then I played with the Mesa and forgot the HB04 for now lol. HB04 problems are to do with joints in linuxcnc if I was using 2.7 it's a lot easier to configure so I will get the mesa to work first then the HB04.

Spindle nuts so I can keep my popular collets fitted in the nuts for rapid tool changing and they're >£10 a nut from UK supplier if I ever need a spare I paid £10 for all 4 from China 8 day delivery.

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Originally Posted by Desertboy

Spindle nuts so I can keep my popular collets fitted in the nuts for rapid tool changing and they're >£10 a nut from UK supplier if I ever need a spare I paid £10 for all 4 from China 8 day delivery.

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The difference being balance.!!. . . . The Chinese nuts will Kill your spindle PDQ if they are not balanced correctly.

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Originally Posted by JAZZCNC

The difference being balance.!!. . . . The Chinese nuts will Kill your spindle PDQ if they are not balanced correctly.

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How do I tell?

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Originally Posted by Desertboy

How do I tell?

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If out of balance you'll get vibrations.!

Got the HB04 working this makes it easy ;)

https://forum.linuxcnc.org/10-advanc...c-setup-in-2-8

Loving it so far very responsive.

https://youtu.be/L0xiHTrlaow

I want one
https://www.banggood.com/Alien-Insec...r_warehouse=CN

Attachment 23896

It's educational and for kids ;)

Ideal for that 5 year old who waiting to turn 10 so he can start playing gta v online like all his mates lol.

Nice educational toy for kids,it is like.."eat your food or I will bring the Allien toy" haha!
The good thing is that Aliexpress has money back guarantee of the item you receive is not as described! :-P

https://www.ebay.co.uk/itm/New-Allox...72.m2749.l2649

Couldn't resist at £20

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Originally Posted by Desertboy

https://www.ebay.co.uk/itm/New-Allox...72.m2749.l2649

Couldn't resist at £20

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Seemed like an awesome price!
Please update if you are satisfied :D

Skickat från min SM-G955F via Tapatalk

Wow, thats a price i cant resist, one on order!

I'll put it on the mill, if that lives more than a day i'll get one for the plasma cutter.

Only concern is the resistance touch panel, not as good as capacitive but if it fails then no real loss :)

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Originally Posted by Desertboy

https://www.ebay.co.uk/itm/New-Allox...72.m2749.l2649

Couldn't resist at £20

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Erm.!! . . . . . Free delivery but Location says Arlington USA.!! . . . . Smells Scamy to me.?

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Originally Posted by JAZZCNC

Erm.!! . . . . . Free delivery but Location says Arlington USA.!! . . . . Smells Scamy to me.?

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I did think that but paypal will refund if not delivered so I figured worth a punt if it doesn't come I won't be out of pocket and maybe I'll get lucky.

After having 2 pc's in a row that wouldn't boot with my Mesa card (1 in 200 pc's affected I have 2 lol) I figure I'm owed some good luck ;)

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Originally Posted by JAZZCNC

Erm.!! . . . . . Free delivery but Location says Arlington USA.!! . . . . Smells Scamy to me.?

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Yep, completely reeks of scam but with PayPal in between, nothing to lose really.

Hmmm, another seller at £100 with £180 delivery seems more likely.

Recently scammed with an NCR touch screen with keypad (POS unit) - got it working eventually except the touch... dismantled it to find the touch interface and touch overlay not installed (optional extra) - still in dispute with supplier on that.

But. £20... worth a punt, see what the story is