Date   
Re: Compact 5 cnc stepper motor

Emgee Radian
 

Hi Fulis

There is a problem either with the stepper power supply, the stepper control board,  the plug/socket connection or the stepper windings.

If the X axis is working OK the power supply is OK as both axis share the same supply.

Check the plug/socket connection by removing the Z axis plug from the socket at the back of the machine, 
to remove the plug press down the plug release key on the underside of the plug before swinging the plug upwards to remove.
I have used contact spray on the pins and inserted and removed the plug several times to ensure some cleaning action for the blades and socket receptors, it may work.

On my F1 I had an intermittent fault with the Z stepper, on occasions it refused to move the stepper in any direction until the plug was moved around in the socket, eventually I resorted to very slightly bending the plug 
spades sideways to increase pressure contact to the socket, so far it's been working OK.

Using an ohmeter it is simple job to check the stepper windings, details of the coil resistances are
given in the Emco Compact 5 cnc manual available in the Files section of this forum.

The resistances can be checked from the plug but if there is a problem found there it is necessary to remove the stepper connection cover and check within the terminal box to confirm the fault, it may be a broken/loose connection as they are quite fragile.

I haven't suggested you try the Z stepper in the X axis output in case there is a wiring fault in the Z stepper motor, if there is a faulty winding/s that could damage the X stepper driver board.
If the Z stepper does have the correct winding resistances and none have an earth fault you could try it in the X axis output to confirm the stepper is OK and the fault must be elsewhere.

I don't know of any stepper that is a direct replacement for the Emco but the original steppers can be controlled by Mach or similar control system by converting as in Peter Keiser's article in the Files section.

Marcus

Compact 5 cnc and spares from the non cnc counterpart

Patrik S
 

For the compact 5 non cnc there are plenty of spares to be found but for the cnc we seem to have to rely on used parts on ebay.

At the moment im looking for way wipers but i feel some other spares could be handy to keep in stock.

Is there a document on which parts that work on both models?

Regards
Fulis

Compact 5 cnc stepper motor

Patrik S
 

I suspect this topic has been answered before but for some reason yahoo groups work very poorly for me an i cannot search properly.

I own an early lathe made in -83 (so most likely an mk2) that has been upgraded to a mk4.

The z axis stepper motor have started to misbehave.
Yesterday i unmounted the motor and i can stall the motor by holding the pulley wheel with 2 fingers.
I know that the steppers are weak but the cannot be this weak, can they?

So my question is;

Are there any steppers that are compatible with the existing controller or do i have to find an used one on ebay?
Retrofitting to mach 3 is not an option right now.

Regards
Fulis

Re: PC 55?

jasengrice@...
 

Has anyone taken off the splined spindle pulley? I've removed the snap ring, soaked in kroil oil.and heated it....won't budge. Any tips or tricks? Think i have a gear puller, but scared to use it on those small pulleys. I need to mount a timing pulley for encoder. Also thinking of moving to that for motor too.

Thanks,
Jasen

Re: Emco Compact 5 CNC Stepper Driver Wiring

Jan
 


Thanks guys, the longer the more I think about retrofitting my lathe. Profound knowledge and documentation is around in this forum, so it won't be a witch's work to accomplish it.

Jan


Am 18.03.2018 um 17:33 schrieb Stefan Kovačević stefan.cefi.kovacevic@... [Emco_cnc_users]:

 

Sure thing Jeff, I totally get it. At first I wanted to use Mach3, but I ran on this Samco hack, went on with it, and now, even I have replaced the electronics, I still use LinuxCNC.

Stefan

 

From: Emco_cnc_users@... [mailto:Emco_cnc_users@...]
Sent: 18 March, 2018 3:31 PM
To: Emco_cnc_users@...
Subject: [Emco_cnc_users] Re: Emco Compact 5 CNC Stepper Driver Wiring

 

 

Stefan,

 Thank you, but I'm a long time Mach user and would prefer to continue using Mach 3 on this machine as well.

 

Jeff


Re: Emco Compact 5 CNC Stepper Driver Wiring

Sharp.Shooter
 

Sure thing Jeff, I totally get it. At first I wanted to use Mach3, but I ran on this Samco hack, went on with it, and now, even I have replaced the electronics, I still use LinuxCNC.

Stefan

 

From: Emco_cnc_users@... [mailto:Emco_cnc_users@...]
Sent: 18 March, 2018 3:31 PM
To: Emco_cnc_users@...
Subject: [Emco_cnc_users] Re: Emco Compact 5 CNC Stepper Driver Wiring

 

 

Stefan,

 Thank you, but I'm a long time Mach user and would prefer to continue using Mach 3 on this machine as well.

 

Jeff

Re: Emco Compact 5 CNC Stepper Driver Wiring

HaMm3r
 

Stefan,

 Thank you, but I'm a long time Mach user and would prefer to continue using Mach 3 on this machine as well.


Jeff

Re: Emco Compact 5 CNC Stepper Driver Wiring

Sharp.Shooter
 

Mine is5PC, with remote computer control. I might of missed that Jan has Compact5


On Sun, Mar 18, 2018 at 10:46 AM xpylonracer@... [Emco_cnc_users] <Emco_cnc_users@...> wrote:
 

Stefan


The Samco article refers to the Emco 5 PC lathe, not the Compact 5 cnc, very different machines.
The PC was originally controlled by a remote computer, the Compact had it's own on-board computer.

Did you use Linux or Mach for your conversion ?

Marcus

--
Stefan Kovačević
062-655-600

Re: Emco Compact 5 CNC Stepper Driver Wiring

Emgee Radian
 

Stefan

The Samco article refers to the Emco 5 PC lathe, not the Compact 5 cnc, very different machines.
The PC was originally controlled by a remote computer, the Compact had it's own on-board computer.

Did you use Linux or Mach for your conversion ?

Marcus

Re: Emco Compact 5 CNC Stepper Driver Wiring

Sharp.Shooter
 

I am not aware is it MK sensitive, my PC5 was with the Wellturn upgrade, but following Samco’s instructions I got it to work rather quick. Only hardware change that I did was to set those 4 latches in correct position as per his instructions.

Your only limitation will be 0.5 m/min rapid speed, other than that, in terms of precision (72 vs 200 steps) I don’t think you will see any disadvantage at all.

 

Stefan

 

From: Emco_cnc_users@... [mailto:Emco_cnc_users@...]
Sent: 18 March, 2018 8:58 AM
To: Stefan Kovačević stefan.cefi.kovacevic@... [Emco_cnc_users]
Subject: AW: RE: [Emco_cnc_users] Re: Emco Compact 5 CNC Stepper Driver Wiring

 

 

Stefan, I also had an eye on LinuxCNC and the postprocessor by Samco. Do You know, if it works only with the PC5 or will it work with a mark 2, too? If not, can You specify the steps or hardwarereplacement to make it work with a mark 2? I'd appreciate it very much!

Jan

"Stefan Kovačević stefan.cefi.kovacevic@... [Emco_cnc_users]" schrieb:

 

Or you can try with LinuxCNC, with “Samco” from CNCzone forum setup, and not replace anything. Yes, capabilities will remain the same in speed/feed department, but you would be able to use gcode generators etc.

Stefan

 

From: Emco_cnc_users@... [mailto:Emco_cnc_users@...]
Sent: 18 March, 2018 2:57 AM
To: Emco_cnc_users@...
Subject: [Emco_cnc_users] Re: Emco Compact 5 CNC Stepper Driver Wiring

 

 

Thank you for all the replies and information guys! So, based you what I'm reading it sounds like my best bet would be to replace the controller, stepper divers and stepper and run everything off the original power supply. I'm ok with that option and will probably start ordering the parts tonight.

Just as an fyi, in the files section for this group I found a folder called "retrofit guide" and it contained a project someone did where they actually controlled the original stepper driver board and steppers with Mach 3 using a homemade circuit. Basically, they patched into the stepper driver exactly in the way I envisioned and since I wouldn't be using a parallel interface like they did, I bet it could be done without the circuit and chip they used. Still, I agree that the full replacement will ultimately result in a more capable machine.

Re: Emco Compact 5 CNC Stepper Driver Wiring

Jan
 

Stefan, I also had an eye on LinuxCNC and the postprocessor by Samco. Do You know, if it works only with the PC5 or will it work with a mark 2, too? If not, can You specify the steps or hardwarereplacement to make it work with a mark 2? I'd appreciate it very much!

Jan

"Stefan Kovačević stefan.cefi.kovacevic@... [Emco_cnc_users]" <Emco_cnc_users@...> schrieb:

 

Or you can try with LinuxCNC, with “Samco” from CNCzone forum setup, and not replace anything. Yes, capabilities will remain the same in speed/feed department, but you would be able to use gcode generators etc.

Stefan

 

From: Emco_cnc_users@... [mailto:Emco_cnc_users@...]
Sent: 18 March, 2018 2:57 AM
To: Emco_cnc_users@...
Subject: [Emco_cnc_users] Re: Emco Compact 5 CNC Stepper Driver Wiring

 

 

Thank you for all the replies and information guys! So, based you what I'm reading it sounds like my best bet would be to replace the controller, stepper divers and stepper and run everything off the original power supply. I'm ok with that option and will probably start ordering the parts tonight.

Just as an fyi, in the files section for this group I found a folder called "retrofit guide" and it contained a project someone did where they actually controlled the original stepper driver board and steppers with Mach 3 using a homemade circuit. Basically, they patched into the stepper driver exactly in the way I envisioned and since I wouldn't be using a parallel interface like they did, I bet it could be done without the circuit and chip they used. Still, I agree that the full replacement will ultimately result in a more capable machine.

Re: Emco Compact 5 CNC Stepper Driver Wiring

Sharp.Shooter
 

Or you can try with LinuxCNC, with “Samco” from CNCzone forum setup, and not replace anything. Yes, capabilities will remain the same in speed/feed department, but you would be able to use gcode generators etc.

Stefan

 

From: Emco_cnc_users@... [mailto:Emco_cnc_users@...]
Sent: 18 March, 2018 2:57 AM
To: Emco_cnc_users@...
Subject: [Emco_cnc_users] Re: Emco Compact 5 CNC Stepper Driver Wiring

 

 

Thank you for all the replies and information guys! So, based you what I'm reading it sounds like my best bet would be to replace the controller, stepper divers and stepper and run everything off the original power supply. I'm ok with that option and will probably start ordering the parts tonight.

Just as an fyi, in the files section for this group I found a folder called "retrofit guide" and it contained a project someone did where they actually controlled the original stepper driver board and steppers with Mach 3 using a homemade circuit. Basically, they patched into the stepper driver exactly in the way I envisioned and since I wouldn't be using a parallel interface like they did, I bet it could be done without the circuit and chip they used. Still, I agree that the full replacement will ultimately result in a more capable machine.

Re: Emco Compact 5 CNC Stepper Driver Wiring

HaMm3r
 

Thank you for all the replies and information guys! So, based you what I'm reading it sounds like my best bet would be to replace the controller, stepper divers and stepper and run everything off the original power supply. I'm ok with that option and will probably start ordering the parts tonight.

Just as an fyi, in the files section for this group I found a folder called "retrofit guide" and it contained a project someone did where they actually controlled the original stepper driver board and steppers with Mach 3 using a homemade circuit. Basically, they patched into the stepper driver exactly in the way I envisioned and since I wouldn't be using a parallel interface like they did, I bet it could be done without the circuit and chip they used. Still, I agree that the full replacement will ultimately result in a more capable machine.

Re: Emco F1 CNC Stepper Motor

Emgee Radian
 

Hi Francis

Nema 23 is a direct physical size bolt on replacement for the Emco stepper, the shaft size is 6.35mm (1/4") as Emco but may be a little shorter output shaft but you can always secure the steel output pinion with Loctite or similar retaining compound.
You will have to replace the stepper control boards to drive the new steppers, this also means replacing the control system to Mach or similar, in other words a complete retro-fit.

Quoted holding torque is about twice that of the original Emco stepper so should be OK.

If you only want to change steppers so you can use Mach or similar control system have you seen the article in the F1 group Files section by Peter detailing a low cost conversion that retains the original Emco power supply, drivers and steppers ?

Keep us informed of your updating progress.

Marcus

Re: Emco F1 CNC Stepper Motor

Francis
 

Hi Marcus,
 
Thank you for the information, so I will order 3 motors.
I would be sure to keep you informed on the project's progress.
I also have an Emco Compact 3 CNC and I want to do the same thing, so probably need your knowledge.
 
Francis.
 

Sent: Saturday, March 17, 2018 2:46 PM
Subject: Re: [Emco_cnc_users] Emco F1 CNC Stepper Motor
 


Hi Francis
 
Nema 23 is a direct bolt on replacement for the Emco stepper, the shaft size is 6.35mm (1/4") as Emco but may be a little shorter output shaft but you can always secure the steel output pinion with Loctite or similar.
 
Quoted holding torque is about twice that of the original Emco stepper so should be OK.
 
Keep us informed of your updating progress.
 
Marcus

Re: Emco Compact 5 CNC Stepper Driver Wiring

fenerty@artofcnc.ca <fenerty@...>
 

Hi Markus:

  I kept the original spindle, and didn't control it from M3, I used the power switch to control spindle, the ability for M3 to control
it just didn't seem that important as I'm always there in front of it anyway.  I modified the original disk but only because my sensor was burnt out.
I drilled an index hole for a new sensor and threaded using the 1 pulse per rev in M3. At the time the index slots were too high a frequency
so I decided to develop it as single pulse.

   I kept the disk, just added a new IR sensor and used only 1 slot per rev. I tapped into the main supply to feed the breakout board I installed
inside with 2 gecko drivers for the steppers. I used 72 Oz.In. steppers (or so the ad claimed) and Ive never had motion trouble. In fact the
Z drive will crush your hand if your not careful, it will not jam to a stop easily , the pitch is too small.

  Somewhere on the Mach3 or 4 forum is a photo pictorial of my changes, if its still out there. I still have and use that same machine from over a decade back.

 The spindle motor on mine is weak, some have the DC motor installed, which Ive seen take a 1/4 pass of steel in a single pass, but mine is the AC induction 1/4hp, which is really too weak and could be much better if replaced with a servo..which someday I may do.

Art
 

On 3/17/2018 6:41 AM, xpylonracer@... [Emco_cnc_users] wrote:
 

Hi Art


Did you retain the original PM spindle motor and control ?
Did you use the original timing disc to sync the threading process in Mach 3?

Thanks, Marcus

-- 
thx

Art 
www.gearotic.com

Re: Emco F1 CNC Stepper Motor

Francis
 

Sent: Saturday, March 17, 2018 1:05 PM
Subject: Re: [Emco_cnc_users] Emco F1 CNC Stepper Motor
 


Hi Francis
 
I can't open your screenshot, can you post a page link to the stepper ?
Nothing wrong with your English, no need to apologise !!!!
 
Marcus

Re: Emco F1 CNC Stepper Motor

Emgee Radian
 

Best join the Emco F1 group Francis, link below.

Re: Emco F1 CNC Stepper Motor

Emgee Radian
 

Hi Francis

I can't open your screenshot, can you post a page link to the stepper ?
Nothing wrong with your English, no need to apologise !!!!

Marcus

Re: Emco F1 CNC Stepper Motor

Francis
 

 
Hello,
I would like to change the stepper motor of my Milling machine Emco F1 CNC.
What do you think off this stepper motor?
Sorry for my Enghish , i am french.
 
Regards,
 
Francis.