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Rotary Table vs. Super Spacer?

November 5, 2017, 8:20 pm
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I'm looking into purchasing the 4th axis for my 770, because some new work may require it.
So......
What's the difference between the 6" Rotary Table, and the 6" Super Spacer?
I tried to do a comparison on the TORMACH website, but I didn't see a HUGE difference.
Both can be operated horizontally or vertically.
Both come with kits.
It appears that the Rotary mounts to the left, and the Super S. mounts to the right?
Is that it?
There's a $500 difference!
$1395 for the Rotary Table kit
$1895 for the Super Spacer kit

So, What am I missing here?
What's the difference?

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Which Keling Drivers for PM-25MV ?

November 5, 2017, 2:45 pm
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Hello everyone!

I've been reading this forum for a long time and finally am going to try my hand at converting a small CNC mill. I've decided on a PM-25MV, Arizonavideo's kit, LinuxCNC, ASRock Q1900B motherboard with built-in parallel port (Amazon has some old stock), and Keling motors and drivers from Automation Technologies.

My question has to do with the Keling drivers. I've narrowed the choices down to two packages from Automation Technologies. Both have Nema 23 570 oz/in motors for the X and Y axes, but one has a 906 oz/in motor for the Z axis and the other has a 1200 oz/in motor. I'm not sure how much difference this extra torque makes, but the more expensive package also has some upgraded "32 bit DSP based" drivers -- KL-8070D vs KL-8060 and KL-5056E vs KL-5056.

Does anyone know if the new drivers are actually better, or are the bugs still being worked out? Are they (plus a larger motor) worth an extra $110?

https://www.automationtechnologiesin...or-3-axis-kit/

https://www.automationtechnologiesin...04-kit/3-axis/

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Shop pics and projects

November 5, 2017, 9:50 pm
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Designing small VMC 3/4 scale VMC 15

November 5, 2017, 10:16 pm
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So ill update this as i complete the CAD drawing but ive been looking at buying a VMC but im cheap. So i started thinking maybe go the china route like LCVETTE did but he has an actual production need. I just do some small one offs for my brothers company and my current mill handles that fine. This will be a practice of drawing every bit in cad then ill calculate costs and if it comes out under the cost of a used VMC of the same class then I will proceed. I may do it even if the costs are higher just to have built the machine. My other option is to convert a RF-45 to cnc but by the time i add linear rails and whatnot i think the cost will be about the same unless i can find one used for dirt cheap (doubtful) and still nothing but crappy tts for an atc.

So my goals are:
Keep cost reasonable
Be able to have slide ways machined on my current machine (I can coax about 24"x40" i think but ill have to reverse the x axis motor.)
Be able to cut 12"x12" plate minimum
Needs to be fast 400ipm rapids or so
Needs to hold .001"
Well designed to fit everything well
To learn how to better design structures and the small details
Off the shelf components
Rigid machine
30 or 40 taper machine i want readily available tools plus my current machine is a 40 taper
No more mach 3
Complete weldament machine (so far ive been able to keep this up) but i have to be able to weld it with my machines
Not my goal so much but a selling point if i end up needing a more industrial machine is keeping it under 2000 pounds (i think it will finish right at that with control etc)

Other things
Alot of the bar stock sizes and whatnot i use are what i have on hand. so far ive kept it as only weldaments

This machine is designed by me. I did use some of Fadals ideas but i didn't take any measurements besides looking at pictures and doing some basic referencing (I have never seen one in person) just saw a manual. I am guessing that the main tube on a Fadal is 16" and mine is 12" so that is where the 3/4 scale came from. I admit that their way cover ideas were ingenious and i may have borrowed that. I didn't have much to go off either there isn't much out there on these vmc15s.
What type of cad files do you guys like? for now ill post a picture of the main assembly i have so far.

I use Solidworks for modeling if anybody cares

Spindle:

I considered using a tormach pcnc 1100 spindle but theres no ATC capability on the 30 taper model so i found these spindles on ebay and alibaba that are bt30 with pedal clamp for around $700 so thats probably what ill design around. considered just using the pcnc 1100 head casting too but if i can make the saddle weldament ill be able to weld up a head.

Fabrication:
I plan on stick welding pretty much everything together and later ill decide on whether ill send it to get normalized or if ill get two of the grass burner torches and just do a good post weld heat. I think the welds will have to be pre heated (about 400 f) i think so that would be the easiest time to raise that temperature up to normalizing temperature (900-1100 degreesf)

Equipment:
I have a large lathe 14x54(19" actual swing 14" is over the cross slide lol)
Decent size mill its a Spindle wizard excello 602 retrofitted by me.
220 amp mig
175amp dc tig/stick
6x18 surface grinder
decent size bandsaw
all sorts of other tools

Travels:
I said what i wanted in the beginning but it looks like so far ill be getting about X18" Y14" and Z24"
the z I am still not sure on as I have yet to design the spindle mounting plate only the beginnings of the column. the X and Y and mostly finished pending some minor modifications to what rail size (id like to use standard sizes) The table is 18"x12" and i think ill have to get this piece cast and ground from china but thats long in the future

Control:
Gonna try Linux cnc with Gmccoppy on my other machine so well see how that goes
Planning on a set of mesa cards if i decide on the linux


Lastly bear with me I am active duty military so don't expect to see this machine in 6 months it could take me a year or three. Plus i am in the process of having a new shop built back home so that will take priority over this and ill only be messing with actual construction when I am back home on leave. Therefore i have loooottss of time to fully learn to design every aspect. Hopefully i get a good response from you guys to keep me motivated and answer my thousands of questions.



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I always want to support enthusiasts and hobbyists

November 5, 2017, 10:50 pm
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I always want to support enthusiasts and hobbyists and help to answer questions about lasers, engraving machines, so if you have any questions about lasers or you want to share with your experience while working with our or someone's else lasers, you are welcome to do this:
Feedback from our customers - EnduranceLasers
Share your story here!

If you have any issues you need to solve, do not hesitate to ask here! we will be happy to help!
Ask your question here. - EnduranceLasers

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I always want to support enthusiasts and hobbyists ...

November 5, 2017, 10:52 pm
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I always want to support enthusiasts and hobbyists and help to answer questions about lasers, engraving machines, so if you have any questions about lasers or you want to share with your experience while working with our or someone's else lasers, you are welcome to do this:
Feedback from our customers - EnduranceLasers
Share your story here!

If you have any issues you need to solve, do not hesitate to ask here! we will be happy to help!
Ask your question here. - EnduranceLasers

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I always want to support enthusiasts and hobbyists

November 5, 2017, 11:01 pm
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I always want to support enthusiasts and hobbyists and help to answer questions about lasers, engraving machines, so if you have any questions about lasers or you want to share with your experience while working with our or someone's else lasers, you are welcome to do this:
Feedback from our customers - EnduranceLasers
Share your story here!

If you have any issues you need to solve, do not hesitate to ask here! we will be happy to help!
Ask your question here. - EnduranceLasers

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I always want to support enthusiasts and hobbyists

November 5, 2017, 11:02 pm
$
0
0
I always want to support enthusiasts and hobbyists and help to answer questions about lasers, engraving machines, so if you have any questions about lasers or you want to share with your experience while working with our or someone's else lasers, you are welcome to do this:
Feedback from our customers - EnduranceLasers
Share your story here!

If you have any issues you need to solve, do not hesitate to ask here! we will be happy to help!
Ask your question here. - EnduranceLasers

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Hybrid Fanuc

November 5, 2017, 11:59 pm
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Helo guys,
I write this thread becouse I need a help with hybrid fanuc FA8303 4L4 AF19 2 I can not find them on Internet. Maybe somebody from this forum can help with this part, Or maybe some datasheet, repair idea?

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Need Help! Open Source/Open Hardware CNC controller?

November 6, 2017, 12:25 am
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Hi,

there are a lot of CNC controllers out there which makes it a bit difficult to find a suitable one. So I try to ask this question here:

I'm looking for a CNC controller which is Open Source/Hardware, means where all data of this controller are available and free and open to the public.

This controller should have at least three axes X, Y and Z and a programming interface where one can send the coordinates to where the axes should be driven to (all with each other keeping the motion path, so a plain three-axis motor controller does not work). additional interfaces for reference switches and turning a tool on and off should exist too.

So: any idea or suggestion regarding such a hardware? Does something like this exist?

Cheers

Elmi

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Need Help! Fadal 2016L - Problem with the ATC and G53

November 6, 2017, 1:28 am
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Hello!

I try to help a workshop on my highschool.
They have a Fadal 2016L

When i run for example T1M6 the spindle is 3-4mm to high for the toolchanger. OR the toolchanger is a little bit to low.
So, how can i find the problem?
Is there a method to adjust the ATC in the hight?
If i see on the axis marks on the right side of the spindle, the spindle is maby 1mm further down. (G53)

This results sometimes that the machine drop the tool in the table when changing tool.


-Thanks, Robert.

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CNC router with his excellent products

November 6, 2017, 2:13 am
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Hello, everyone, very thanks for your interests in this title.

We made a new production with the UT-1325 cnc router:




First, cutting from the wood board
Then assembly all the boards together.





The UT-1325 cnc router is professional for woodworking, such as plywood, mdf and etc. It can cut and engrave on different kinds of materials.

Further information, feel free to consult UnionTech:

bill@union-cnc.com
Jinan UnionTech Machinery Co,. Ltd.

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Tool Changer on AJAX AJ540

November 6, 2017, 3:02 am
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Hello;
I have a problem with the tool changer on this CNC milling machine;
Manufacturer: AJAX.
Model: AJ 540 CNC.
Controller: HEIDENHAIN TNC 360.
The problem is that the automatic tool changer is not functioning.I think the reason is that it has lost the reference (it does not know what is the number of the selected tool in the tool magazine).
Does anyone know how to teach this reference to the machine?
Thanks in advance.
GHASSAN BITAR

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Tormach in Germany?

November 6, 2017, 3:10 am
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Anyone from germany owning a tormach in here? I would like to know where you bought it, how it was imported and if there were hidden costs besides shipping and taxes.

If not german, maybe someone from within europe who can give some informations on those topics.

Thanks!

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Need Help! Stepper selection, torque and inductance

November 6, 2017, 3:20 am
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I know that is may not be in the correct section, but

Having read this long build log, https://www.usinages.com/threads/cnc-mecanosoudee-type-portique-mobile-pour-laluminium.63531/page-35


(Which is in french by the way)

The builder, rider63, is initially using 34HS6850 2.2Nm nema34 steppers to move a very chunky gantry router. The z is at least 35kg, the gantry, at least 75kg. (it's welded steel plate filled with resin)

There are videos showing it cutting aluminium and steel at pretty fast feeds.

Later on, he does switch to 400w servos, but he selected the steppers to get low inductance, in order to get fast feed speeds. Torque didn't seem to be too important to him.

He also used drivers that allow the drive current to drop when the motor is stationary, to reduce heating.

Is there a tool/formula for estimating required stepper torque for a given mass and acceleration requirement?

Cheers!

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New Machine Build Have an incomplete machine and need help with a build :)

November 6, 2017, 3:45 am
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Hi, I am new to the forums and would like to introduce myself to you all, so hello and I hope you are all friendly people,,,, :)

My name is John, and I am from the wonderful land of Australia....

I purchased an incomplete CNC router about a year ago and its been sitting in my shed waiting for me to take a look at it, there is a heap of parts, the table, the gantry and the rest. It is a 1200mm x 1200mm setup,

It appears to be missing a z-axis assembly which I am needing to create. It as I am told has a gecko driver, psu, and steppers. Also no spindle

The bloke I purchased it off had to move it on for space, so now its my problem. Anyway first of all it appears to me to look like a kit of some sorts, the legs are painted and assembled in a way that looks like a kit.. if anyone knows of this being a kit unit i would like to know.

Mainly need to cut ply, and carve soft and hard woods, a little plastic/composite possibly, will need to operate off a single 15amp 240v circuit.

Here are some shots of the table: (they are posting upside down, I cannot solve this, ??? they display alright on pc, and I have tried to rotate them before import and still upside down.. )
and all of the parts i have laid out,






The table design is bolt together with threaded cross tensioners, ,looks like a foot collapsed one corner so I have a jack under it untill I can repair.

So I guess I am asking a few questions:

Is this a kit or a router that someone is familiar with ? or just a well made back yard job ?
Any advice on where to start ? (i am guessing getting the table all straight and level)
Spindle and gantry off the shelf solutions?
Any areas of improvement whilst I build it up?
Any other ideas what so ever,,, ?

I would like to document this build as I go through it..... too... :)

Cheers

John

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Looking for Mentors Turbine Lube Oil System

November 6, 2017, 3:55 am
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Hello newbie here,

I'm just curious about something.

You know Turbine have some interlock specs.

This is our turbine lube oil press interlocks
  • Aux lube oil pump outlet press : 17.5 Bar
  • Lube oil press normal : 0.8 - 1.2 Bar
  • AC lube oil pump auto start : 0.69 Bar
  • DC lube oil pump auto start : 0.59 Bar
  • Turbin Trip : 0.4 Bar


I have a question, what things that makes changes in lube oil pressure? Sometimes it can be too low or too high.

And, you know from the interlocks spec if the pressure too low, AC pump will be turn on automatically. what is the relation of low pressure with AC pump? Because as i know, AC pump is used if the turbine speed is too low.

Thx before.

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Looking for Mentors Steam Sealing System

November 6, 2017, 4:06 am
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Hello newbie here,

I need an explanation about steam turbine sealing system
  1. continuous steam sealing system
  2. Self sealing steam system,


What the difference?

Thx before.

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Need Help! Stepper selection, torque and inductance

November 6, 2017, 3:20 am
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I know that is may not be in the correct section, but

Having read this long build log, https://www.usinages.com/threads/cnc-mecanosoudee-type-portique-mobile-pour-laluminium.63531/page-35


(Which is in french by the way)

The builder, rider63, is initially using 34HS6850 2.2Nm nema34 steppers to move a very chunky gantry router. The z is at least 35kg, the gantry, at least 75kg. (it's welded steel plate filled with resin)

There are videos showing it cutting aluminium and steel at pretty fast feeds.

Later on, he does switch to 400w servos, but he selected the steppers to get low inductance, in order to get fast feed speeds. Torque didn't seem to be too important to him.

He also used drivers that allow the drive current to drop when the motor is stationary, to reduce heating.

Is there a tool/formula for estimating required stepper torque for a given mass and acceleration requirement?

Cheers!

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Just In Mastercam tip

November 6, 2017, 5:07 am
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I just recently discovered something new in MC.

When facing, you don't have to create any geometry. You can simply face directly off of the stock dimensions.

I just thought that was cool and wanted to share. I'm still learning new things on the old software, V8.
~Alex

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