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  • andypugh
  • andypugh's Avatar
10 Sep 2024 12:10
Replied by andypugh on topic 3phase motor and pulley

3phase motor and pulley

Category: Advanced Configuration

You can probably do this in the VFD settings, if you want. (depending on how it is controlled)
Otherwise, yes, ideally you would use some scaling function in the HAL to convert the commanded speed to motor speed.
But you probably already have this somewhere, I imagine that something takes spindle.0.speed-cmd and coverts it to a PWM duty cycle or similar? Just change the scale factor there.

How is the VFD controlled?
  • russkinch
  • russkinch's Avatar
10 Sep 2024 11:41
3phase motor and pulley was created by russkinch

3phase motor and pulley

Category: Advanced Configuration

Good afternoon all.

I am rebuilding my lathe and have decided to use a 2:1 toothed belt on my 3 phase motor, giving less rpm but more torque as I never use the high rpm. My question is, I have an encoder that is driven from the spindle and not the motor. My VFD is set as per the motor specs (top RPM at 50hz is 2840 rpm). How do I set my HAL file and do I need to?? My max RPM would be about 1420 or so based on the 2:1 reduction.

Thanks

Russell
  • besriworld
  • besriworld
10 Sep 2024 11:35
  • Unlogic
  • Unlogic
10 Sep 2024 11:30 - 10 Sep 2024 11:33
Replied by Unlogic on topic Optimum Optimill MH50V CNC conversion

Optimum Optimill MH50V CNC conversion

Category: Milling Machines

This is how the cabinet looks now with the 4th servo driver installed.

 

As always when modifying the cabinet with expensive electrical components the first power on was a bit scary. However there was no magic smoke but instead I was greeted with the most horrible fan noise I've ever come across.

I promptly removed the new servo driver and popped off the side cover to find two small 40x40x15mm 24v fans rated at no less than 11 000 rpm!

 

I made a short term fix for now and soldered in a 80ohm 3w resistor for each fan to bring them down to 15v.

 

 

However they are is still far from quiet so I'll be monitoring the temperature of the spindle servo drive and see if I can get away with installing quieter fans.

Before I turned my attention to the configuration and HAL changes required for the new servo driver to work I replaced the keyboard attached to my control panel.

I had previously been using a full size keyboard but some functions in Probe Basic like selection of multiple lines in the editor (normally done with shift + arrow up/down) doesn't work without a mouse so I opted for a new old stock Microsoft All-on-One Media keyboard instead.

 

This keyboard is slightly vintage in IT terms but it has some features which I liked such as a dedicated left mouse button on the left side of the keyboard and touchpad which actually moves down when you click on in. This simplifies the use of the touchpad with gloves on.

To make sure that the keyboard stays in place while in use while at the same time be simple to remove when necessary I attached it with magnetic tape this time.

 

 

 
  • bertoldo
  • bertoldo
10 Sep 2024 11:26 - 10 Sep 2024 11:55

Notes from installation of ethercat on Raspberry Pi 4

Category: EtherCAT

raspberry pi 4 8 ​​giga ram, instalei 2.9.2 instalação perfeita... agora vou tentar comunicação. tks . Vou postar a evolução... I download link www.linuxcnc.org/iso/rpi-4-debian-bookwo...23-11-17-1731.img.xz 
  • Unlogic
  • Unlogic
10 Sep 2024 11:09
Replied by Unlogic on topic Optimum Optimill MH50V CNC conversion

Optimum Optimill MH50V CNC conversion

Category: Milling Machines

With the gearbox emptied of unnecessary parts I installed the new servo and turned my attention to the electrical stuff.

 

 

Last time I soldered the cables myself for the DB-44 connectors on the Delta B3 servo drives. This was very tedious as the DB-44 connectors are very densely packed and a small mistake where two cables had their insulation melt slightly during soldering caused a short circuit on humid day which partially fried one of the stepper outputs on the 7i96S board.

To avoid similar problems this time I bought a DB-44 cable from AliExpress for 39$ including shipping. It took a while to get the cable but when it finally arrived it looked okay and seems fairly well made.

 

 

I cut it down a bit including the shielding before installing it in the cabinet and cutting the individual cables to length.







 
 
  • Abdulkareem
  • Abdulkareem
10 Sep 2024 10:51
jogging after homing was created by Abdulkareem

jogging after homing

Category: Qtvcp

I have an issue while creating a custom Qtvcp GUI where if i jog the axes after homing all axes all the jogging buttons the move the x axis only but if the machine isnt homed everything works just fine i use action buttons here is a screenshot of my GUI and my handler file any help would be appreciated 
  • Unlogic
  • Unlogic
10 Sep 2024 10:49
Replied by Unlogic on topic Optimum Optimill MH50V CNC conversion

Optimum Optimill MH50V CNC conversion

Category: Milling Machines

With all the parts manufactured it was time for the scary bit, taking apart the gearbox and removing all the parts that will no longer be needed.

First thing to be removed was the huge 2kw induction motor.

 

Next up was the top cover for the gearbox which to to my great delightment had two threaded holes where long bolts could be inserted to gently lift the cover.



Getting the cover off and removing all the gears however was a bit tricky as the gears and gear change mechanism had to be removed in a particular way in order to not get all tangled up.

 

 

Here is a test fit of the servo mount on the top cover of the gearbox.

 

After verifying that the mount actually fit I removed two of the three shaft in the gearbox. On the final shaft I pressed off all the gears that could be removed from it and installed new steel caged SKF bearing rated for 12k+ RPM

 

 

Here is how the shaft looks with the pulley adapter on top (just loosely installed at this time).

 
 
  • Unlogic
  • Unlogic
10 Sep 2024 10:31
Replied by Unlogic on topic Optimum Optimill MH50V CNC conversion

Optimum Optimill MH50V CNC conversion

Category: Milling Machines

With the adapter done I turned my attention to the mount for the new servo motor. These were also designed in FreeCAD and I then milled them on the mill using tool paths generated by the CAM/Path workbench in FreeCAD.

 



 

 

 

Here is the mount fully assembled with the servo motor installed.

 

 
  • pietxs
  • pietxs
10 Sep 2024 10:25

Maho MH-C 700P Achsen bewegen sich dauerhaft Indramat 3TRM2 

Category: Basic Configuration

Hello, thank you very much for your tips. Unfortunately I can't get any further on the matter. Can anyone do something with the images I sent or has an idea for solving the problem?

Thanks in advance for any efforts
  • Unlogic
  • Unlogic
10 Sep 2024 10:25
Replied by Unlogic on topic Optimum Optimill MH50V CNC conversion

Optimum Optimill MH50V CNC conversion

Category: Milling Machines

The hole in the pulley is 0.02 mm smaller than the top of the adapter which should hopefully be enough to hold it in place without slipping when used together with some Loctite 638.

 

 

Here is a video showing how it fits on the shaft:



The hole at the top of the adapter is threaded M20x1 so that I can attach a puller if I ever need to remove the adapter in the future.
  • Unlogic
  • Unlogic
10 Sep 2024 10:22
Replied by Unlogic on topic Optimum Optimill MH50V CNC conversion

Optimum Optimill MH50V CNC conversion

Category: Milling Machines

I've finished the removal of the gearbox on the mill and replaced it with 1:1 belt drive using the 2kw 6000 rpm Delta B3 servo I purchased earlier this summer.

The first step of the process was to remove the magnets for the RPM sensor that came with the mill from factory.





The magnets were not just pressed in but also glued in place which made them a bit tricky to remove. What ended up working best in the end was heat from a small gas torch and a strong magnet to pull them out while hot.





Next up was the design of an adapter in FreeCAD so that I could attach a tooted pulley to the end of the shaft.



Bought some S355 steel and a steel pulley and had a friend machine them for me on his lathe.



  • tivoi
  • tivoi's Avatar
10 Sep 2024 07:27
Replied by tivoi on topic Fanuc 2S AC spindle motor on Delta C2000+

Fanuc 2S AC spindle motor on Delta C2000+

Category: Milling Machines

motor rate fequency is 50hz
  • machinedude
  • machinedude's Avatar
10 Sep 2024 06:14

What do you really get for a $350 desk top engraver ?

Category: Show Your Stuff

i was wondering if the fact that the Y axis has a lot more power than the X axis that would cause the feedback loop to work harder on the X axis and lag behind the Y axis? that would explain why it shows up on cuts when the X and Y are moving together.

adjusting the alarm set point might show this like you suggested. i just have to figure out how to make that adjustment i'm guessing that is done in the drive with communication cable they send with the kits.

as far as programming goes i should not be getting line segments on arcs and my geometry should be clean. i have seen that when importing files though. But i can look around at settings to double check.
  • besriworld
  • besriworld
10 Sep 2024 06:06 - 10 Sep 2024 15:57
Replied by besriworld on topic Setting up 7i97t w idc26 bob

Setting up 7i97t w idc26 bob

Category: Driver Boards

edit : Wrong advice :) Thanks PCW
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