Date   
Re: Rough Valuation.

d29602960@...
 

Hi Marcus,

Many thanks for your response and so quickly. I see from your comments that I have been to-quick to post and should have done more research as to the model I own plus equipment etc. I have a couple of yellow folders with documentation that came with the machine so perhaps that might have some of the answers.

Sadly, my engineering knowledge is somewhat limited and I have to admit some of the terms you used mean very little to me though I have a rough idea what you are talking about. My knowledge is limited to "metalwork" lessons at school back in 1972/1973 when I used a lathe and aquired the basic skills such as setting tool height and changing speed but little more.

I think (with hind sight) the best thing is to clear enough space in my workshop in order to get at the machine and then take some high res' pictures of the machine/serial plate which will help to identify the model/version. This is something I will have to do anyway before I can put it on ebay. I will post the images to this list and hopefully that will help id the machine positively.

Sadly, I have some furnature to move first before I can get even close to the machine but it will happen this summer as I need the space for a proposed motorcycle.

Marcus wrote:
I live in West Norfolk, UK. are you close as I am looking for 1 for conversion ?
****************

I am located in Lincolnshire about 17 Miles North of Lincoln. BTW what did you mean by conversion ? Just curious.

Thanks again for responding.

Des.

Re: automatic tool changer adjustments?

m.wg@...
 

Probably best to align your round tools to X = 00 and and change your other tool offsets.
Marcus

Re: tools for turret

m.wg@...
 

Which country are you living in ?
Have you looked at eBay ?

tools for turret

matthew moser
 

I need to find decent substitutes for emco cutters.  I suppose I can substitute a .5 shank cutter for a 12 mm one.  Can anyone give me a list of tools they have found, a catalog from which to order them and tool numbers and numbers for their carbide inserts?  I need the following:

Right hand cutter

Left hand cutter

Thread cutter (external) RH

.375 diameter boring bar, or 10 mm diameter with indexable inserts

Any help would be appreciated.

automatic tool changer adjustments?

matthew moser
 

The drills on my compact 5's auto tool changer align somewhat off of X 0.  They are off by .050 or more in the Y axis.  Do I correct this in a g26 command, or do I disassemble the unit and try to correct it there?

Re: Rough Valuation.

m.wg@...
 

Hi Des

Upload a picture of your actual machine otherwise the Mk cannot be confirmed, the 1 pictured is a Mk2.  Also state what equipment you have with it such as 3 and 4 jaw chucks, steady, faceplate, collet chuck and collets, tailstock drill chuck, fixed/live centres, Tooling block and toolholders, tool setting plate and microscope, RS232 computer connecting lead.
Any or all of these parts make a difference to the value, also of course does it function in Manual and cnc mode ?

I live in West Norfolk, UK. are you close as I am looking for 1 for conversion ?

Rgds, Marcus

Rough Valuation.

d29602960@...
 

Hi everyone,

I purchased a CNC 5 here in the UK a few years back much the same as the one shown here...

http://www.cnccookbook.com/img/OthersProjects/EmcoLathe.jpg

 



The one I have does not have the tool turret option its just the basic cnc.

Sadly, like many toys I have purchased in the past I now find I dont have the time or space to make use of it and was thinking about putting it on ebay but have no idea what to start the bidding at.

I picked it up from a local school which could not afford to have the keyswitch repaired after it broke early in its working life. They also found they could not afford the insurance to cover students working on machine tools. H&S gone mad!

Anyway, if someone could give me a ballpark figure as to what bidding should be started at or what reserve I should put on the machine I would be very grateful.

Thanks for reading,

Regards,

Des.


Re: lightning strike

Michael Nail
 

thanks for everyones info , I have another question it seems that the emco compact 5  servos are all good and I dont see any places on any of the printed circuit boards show any burned out spots so Im thinking the parameters need to be set or that board needs to be replaced, what do anyone think or had the same ploblem before.



On Wednesday, May 13, 2015 4:28 AM, "m.wg@... [Emco_cnc_users]" wrote:


 
Correction to a detail in my last post ref the stepper power.
In the Emco  2019 manual it states a step motor torque of 0,50 Nm,
but approximately 1000 N force on the shaft because of the geared drive.

As far as I am aware the original motors cannot be used with the currently available low cost controllers, the motors are hybrid and need special drive electronics.

You may be able to re-use the PSU if after testing the outputs you find all are OK, damage could be limited to the electronics on the main control board.

Rgds, Marcus


Re: need help troubleshooting a CNC5... was working, now not so much...

m.wg@...
 

Eric, uploaded a drawing with some PSU wiring detail not shown on the electrical schematics in the manual, may help with the problem.
Marcus

Re: lightning strike

m.wg@...
 

Correction to a detail in my last post ref the stepper power.
In the Emco  2019 manual it states a step motor torque of 0,50 Nm,
but approximately 1000 N force on the shaft because of the geared drive.

As far as I am aware the original motors cannot be used with the currently available low cost controllers, the motors are hybrid and need special drive electronics.

You may be able to re-use the PSU if after testing the outputs you find all are OK, damage could be limited to the electronics on the main control board.

Rgds, Marcus

Re: lightning strike

Gary Schoep
 

I have been gathering CNC parts to convert my manual compact 5 to CNC if I dont just buy another bed and spindle and build a second lathe.  This is what I am looking at for the parts.

1 PC running LinuxCNC - cost free as I have one.  Expect $50
The PC does not need to be top of the line just have a parallel port. I am betting that anyone can get a working PC for $50 or less. You will spend sometime getting the software configured to work with your setup but it is really pretty easy and there a quite a few people who will help.  The only question I have is interfacing the spindle to the software.

2 Nema 23 steppers - cost free as I have them. Expect $50 to $100 to replace
Motors can be picked up cheap on ebay or at a surplus place or at Automation Direct.  The trick is to get a stepper that matches your driver/indexer. I seem to remember that other drives can be wired bipolar and I probably did this on my Bridgeport. Also, if you were happy with the performance of the lathe before you can skip the cost of replacing the motors.

2 axis stepper drives - cost free as I have them. Expect $200
Stepper drives should accept step and direction. 
Gecko (bipolar) drives run about $100 and I have used them before and they have cheaper options which may work with your motors.  Gecko has great tech support. I was once told that if I burned up a drive they would replace it free as long as I could send the bad one in and tell them what I did to break it.  I used them on a Bridgeport Boss 3 CNC mill.  The steppers on the beast were 8 inches in diameter.
 
A stepper power supply.  
Basically all you need is a step down transformer, a bridge and some filter caps.  You can probably use the one on your lathe now if it was not damaged especially if you use the same steppers.

A parallel breakout board.  Expect $129
I used cnc4pc's c11 multifunction board which is kind of a deluxe option as I want to add coolant etc.  It was trivial to set up and easy to wire an eStop. This board needs power which is a different voltage than your steppers.

The spindle drive is the only difficult thing.  For me I have the single phase AC motor.  This does not allow coordinated motion between the axii and the spindle.  So the cost is nothing but i have to change speed with the pulleys and turn on the spindle manually.

If you have the 95vdc, 5.6a dc motor then you are going to need a controller.  Gecko has one but it maxes out at 80v and 20a.  It may be useable on the EMCO spindle motor at the reduces voltage.  I would simply call Gecko and ask.  Since the drive is only $100 it may be that this is a really good option even running at 80v (if possible).

My cost for the electronics is going to be only the breakout board, $129.

Your cost would be approximately $500 if you do the deluxe options and keep your steppers.
PC $50
Steppers: $0 use existing
Stepper drives: $2@100
Breakout board: $129
Servo drive: $100
Assorted wire, e-stop, etc: $21

I want to build a control panel as I am jealous of how good the CNC lathes look.  I designed one for my mill which should be easy to pare down for a lathe.

Electrical Musings: DIY CNC Milling Machine Control Panel for EMC2

 



Re: lightning strike

m.wg@...
 

Hi Nail

Guess you are in the USA so you have plenty of choice which does sometimes make deciding which equipment to purchase more difficult.
What make you get will be determined to some extent on how much you are prepared to spend and how reliable you need the system to be.
Parts required as follows.
2off Nema 23 type Stepper motors or servos, check existing shaft diam so you can use the original splined drive gear.
(I believe the original steppers were less than 1 Nm output torque)
2off controllers to drive above steppers/servos
Power supply unit with voltage outputs to suit controllers
Break-out board for isolated connections
Mach 3 + licence or Linux or some other control software.
Parallel cable from computer to Breakout board.
Hope this helps.
Marcus

lightning strike

Michael Nail
 

I bought a emco compact 5 cnc and got everything working till this weekend when a storm came through and lightning hit my internet and follow through the computers and then trough the rs232 cable and now when I turn on my system I get alot of scrambled or mix g-code allover the screen , my question is were and how much is a mach 3 controler system gonna cost?

Re: rs232 communication

m.wg@...
 

Diego, screened or shielded cable is best but if you route the cable away from power cables it may be OK, alternatively run the cable through steel or Aluminium tube/flexy pipe.
Marcus

Re: need help troubleshooting a CNC5... was working, now not so muc

eric warner
 

Rick -

I'll let you know what we find out here as I get the board up and running.  A question for you though, when you do an external 5V supply, do you simply tie the ground of the external supply to pin 6 and then the +5 to the wire that would have been on pin 5?  I'm thinking this makes sense, but before I blow a circuit (unlikely i know with only 5V on this machine...) I figured I would ask :).

Thanks,
Eric

Re: rs232 communication

georgedegroff
 

Question on this cable do I need to use shielded cable? Or can I just use any four wire cable?
Thank you for your time

George
West MI



On Thursday, January 23, 2014 4:20 PM, "m.wg@..." wrote:


 
Hi Diego

Look at the Photo file RS232 Wiring, gives you the details needed.

Rgds, Marcus


Re: need help troubleshooting a CNC5... was working, now not so muc

rthoracing
 

 
One of my lathes is also missing 5 volts on pins 5 & 6.
The machine will run with external 5 volts applied to the wires.
I'd like to know what I need to do to repair the board.
Rick  

Re: need help troubleshooting a CNC5... was working, now not so much...

m.wg@...
 

Hi Eric

You have removed and checked all fuses are OK ? pushed them in and out a few times to ensure good contact ?
Suggest you pull the full length output connection rail from the PSU socket to remove any load from the 5v DC circuit, you should then have 5v at term 5, if not then the problem is on the PSU board. I have just uploaded some pics of the PSU board showing some hidden component mounted on the base plate under the main pcb. Added some part numbers from the components in the pics. There is a heat sink on 1 component and I can't confirm type but make some suggestions on the pic, this is certainly in the 5v output cct.
If you can't gain access to remove the complete output terminal block from the PSU you can remove the plugs from the boards carrying the 5v supply.
Motor control board remove plug X22
Main computer board remove plug X43
If all readings are OK until you plug X43 back to the main computer board remove plugs X41 and X42 that go to the stepper boards and check again.
Need a sandwich now but will power the PSU up later and get some readings and post.

Hope this helps !!
Marcus

Re: need help troubleshooting a CNC5... was working, now not so much...

eric warner
 

Marcus (or anyone else who might know :) ) -

I have been chasing voltages down for the past few days and have narrowed my search down to the main power board.  Pins 5 and 6 seem to provide 5V to some of the other circuits in the machine (according to the schematics I can find, as well as the second machine that is working...).  On the machine in question I am only getting about 1 V.  Obviously this points to something on the board.  I found some posts (and put a reply into that thread asking for more information) from about 6 years ago.  I'm wondering if we have any other information to add to this.

Thanks again for all the help!

Eric

Re: power supply board problem

eric warner
 

I am getting this same problem in that pin 5 is only giving me 1V.  I will try the troubleshooting listed here (disconnect the load and see what that gives me)  I'm intrigued by the suggestion of another external power supply.  Being a Mechanical Engineer, I'm always leery about the electronic arts.  I'm guessing that what Santursen did was connect the ground of the external power supply to the ground on pin 6 and then put the 5V from the external supply into the wire that was previously connected to pin 5...  I would rather fix the board, but if someone can confirm my suspicion on this wiring technique I would greatly appreciate it.  If Santursen is still around I would love to hear how this is working out 6 years down the road :).

Also if any of the other contributors have anything else to add to the location of the components etc. that would be greatly appreciated as well.

Thanks again!

Eric