Retrofitting a CharlyRobot 3 axis CNC

Hi everyone!

I'd like to show you my project
And if I need your help, you will know my setup

I remove the proprietary µcontroller board (because I haven't the related software)
but I have kept the 3 drivers.

I want to drive the 3 drivers with LinuxCNC via the parallel port

yours
Mat (from France)

if you trell us the manufactuer of the machine we can help
if you open up the case and tell the PCB reding of the parport Interface we may find the PINout of this

if you alredy got the pinout then you just need to run STEPCONF wizard and the machine will run

is this a ISEL M4030 V1

Hi!

the manufacturer is ISEL/Charlyrobot
reference is unclear maybe PM1 30 with a command control unit C10

Thanks for your offer, but I have sort out the pinout! And last night, I just connected my parallel port straight to the 3 drivers pins.
And I can move the motors :woohoo:





I may have some questions now:
my Z axis can go down but not really up
moving it by hand, the feeling is really fine (smooth, no hard point, no extra effort)

I used an existing similar Charlyrobot setup
here is the Stepconf setup





and here is the motor for Z axis:


but maybe it's not suitable with my motors?

The step timing is to short, so might want to raise that, try 5000.

the isel always use a charge pump
in education center i got the same version 2 with Z break
idid get rid of the C10 and went to a standard 5USD Mach3 5Axis bob
this benefits the full RPM controll of the Spindle the extra controll of the CASE Frame Version2

and ofcause the option to go ETH with the 7i92
fast cabeling as plugs to fit isolated cables not the junk of the isel internal


!! ATTANCIAN!!
the isel V1 uses the H-brige as a GND so the motors 8wire got +24V/48 fixed and the drivers pull them down for a step

MAKE shure you are handeling this

tommylight wrote: The step timing is to short, so might want to raise that, try 5000.

Thanks, step timing value was given by L297 choice.
I tried with custom choice and I had a go at 5000.
Unfortunately, the behaviour is the same... weak Z axis.

I tried the 3 axis with different results:
the Z and X axis are both weak
but gantry Y axis is really beaffy (I can't stop it by hand)

With 500 or 5000, it's the same.

I have to be optimistic if 1 axis is good.
By the way, I have checked the coupling: motor and screw are well linked

bbsr_5a wrote: the isel always use a charge pump
in education center i got the same version 2 with Z break
i did get rid of the C10 and went to a standard 5USD Mach3 5Axis bob
this benefits the full RPM controll of the Spindle the extra controll of the CASE Frame Version2

and of cause the option to go ETH with the 7i92
fast cabeling as plugs to fit isolated cables not the junk of the isel internal

Thanks for your help !
I have no budget for MESA conversion.
I have a 5€ BOB but I haven't find any tutorial to use it with ISEL drivers. I made a search into the forum but it doesn't show up your topics, only yours messages...

bbsr_5a wrote: !! ATTANCIAN!!
the isel V1 uses the H-brige as a GND so the motors 8wire got +24V/48 fixed and the drivers pull them down for a step
MAKE sure you are handeling this

I'm not aware of this, nor the consequences... I just plugged the parallel port to the pins of the 3 drivers via the back PCB and socket.

The l297 chip is only the driver chip for a h-bridge and needs those 5000.
But what is used a h-bridge. Can you see the chip? The h-bridge decides the current, means decides the force of the motors. Do they get warm?

I see 4A on the motor and that was difficult to get in chips on those days.

With the power off:
-Check plugs and wires going to motors for damage,
-Check drives if they are properly seated in their places,
-Leave the machine ON for 15 minutes, check by hand if the motors are getting warm, they should
After checking that, with the power OFF, replace the Y and X motor plugs, turn on and test.

Mike_Eitel wrote: The l297 chip is only the driver chip for a h-bridge and needs those 5000.
But what is used a h-bridge. Can you see the chip? The h-bridge decides the current, means decides the force of the motors. Do they get warm?

I see 4A on the motor and that was difficult to get in chips on those days.

L297 is used with an L298 and that is a 2A part, but it can be used in parallel, one chip using both outputs to power 1 winding and another chip for the second winding. Might be that why the motor is 4A, then again it might not be.....

Yes, in theory this is possible, also i never saw that.
Next question is if there is some current reduction on, remember that this exists, also switched by a signal.
If i understand correct this same electronc has already controlled the mill corecttly before. So must be capable to drive the motors....