Yamazen CNC knee mill

[N4NV]

All my sensors are working at 5V (there are three of them). On my mill I have the CNC4PC C1 board. I am going to change to a PMDX 122 board as soon as my speed control board gets here from Peter Homann.

Vince

[mkenney]

I think this new sensor is going to work with my board. 4.5 Volts on and close to Zero when off. Can't wait to try it off the breadboard and interfacing the BOB itself... Attaching the datasheet on it...

Mark [mkenney]

[N4NV]

Originally Posted by mkenney I think this new sensor is going to work with my board. 4.5 Volts on and close to Zero when off. Can't wait to try it off the breadboard and interfacing the BOB itself... Attaching the datasheet on it... Mark [mkenney]

What was the cost on these? Never mind, I just checked DigiKey and they have them in stock for $7.22 for 1, $4.16 each in quantities of 100. No a bad price for a sensor that is already mounted. That would have saved me a couple of hours on some of my installs. I might have to order some and check them out.

Vince

[mkenney]

Originally Posted by N4NV What was the cost on these? Never mind, I just checked DigiKey and they have them in stock for $7.22 for 1, $4.16 each in quantities of 100. No a bad price for a sensor that is already mounted. That would have saved me a couple of hours on some of my installs. I might have to order some and check them out. Vince

They are $7.22 with the part# 55100-3H-02-A-ND. I'm hoping to get some time today to try it out!!

Mark [mkenney]

[mkenney]

Fixed! Someone pointed out that the pinout is different on the UA package but that the SOT-23 package is listed first in the table and confusing. The pins should be:

1- Vcc
2- Ground
3- Output

So i had the Ground and output pins reversed!!

Works like a charm now with over 4.5volts without a magnet and close to zero with a magnet next to it!!

Mark [mkenney]

[N4NV]

Originally Posted by mkenney Fixed! Someone pointed out that the pinout is different on the UA package but that the SOT-23 package is listed first in the table and confusing. The pins should be: 1- Vcc 2- Ground 3- Output So i had the Ground and output pins reversed!! Works like a charm now with over 4.5volts without a magnet and close to zero with a magnet next to it!! Mark [mkenney]

I made the same mistake when I fist wired them as well.

Vince

[landmark]

I got some of these switches from digikey and without using the 1k pullup resister, with 5v going in I get a .60v normally and almost 0v when the switch is triggered. Should this be right? By adding the 1k pullup it should bring it to 5v?

Second question if I am correct would it be ok to wire the 1k pullup off the 5v Vcc input directly to the hall voltage output so I'm not sending .6v signals all the way to my control?

thanks

[machinist1968]

I'm very impressed with your retrofit, I hope I'm not hijacking this thread, but I have a Topwell 5BVK ( a sister casting to your yamazen) that was "decomissioned" before I bought it. It has the ballscrews , but no quill pinion, control or actuators (servo/stepper) or spindle motor. I believe it was originally equipped with Anilam control, but I can't be sure. It was built in 1996. I don't have any idea what size servos came with my machine, and I'm doing a single phase-three backyard retrofit myself. I'm wondering if you could share your experience and provide a breakdown of the parts you used to bring your to life. I appreciate the time you have invested, and understand if you want to keep some things confidential, but I would like some guidance so I buy well suited components. This machine is somewhat elusive with regards to specifics about the original cnc control, I do however have a thorough user/parts manual. I'm very green with regards to CNC construction, but I do have CNC machinist training. I'm curious to know if the servos are driven by in line amplifiers or directly off the gecko drive? Are the encoders integral of the servos, and if so what is their resolution? Thanks, excuse my ignorance.

[N4NV]

I don't know how much help I can be with the mechanics of your machine. About the only mechanical thing I did was change the Y angular contact bearings as they were bad. Everything except the Allen Bradley controller that came on the machine is still there. I am even using the same servo driver, just supplying the 10v signal with a Pixie board (no longer manufactured). The servo motors have tachs and encoders. The tach are used by the ServoDynamics driver. I don't know the resolution, I let Mach figure that out. You can tell Mach to move the machine 5" (or whatever number you want) and after it moves you tell it how far it moved and Mach will set the proper resolution. I belive the servo motors are ServoDynamics MT30U4-42.

Vince

[toag]

I have a 5BVK that i am working to retrofit. I'll look the motor model number for you first thing monday, i do know that they where Baldors, and they had encoders on the back of them (again, i'll grab model numbers for you). I have been draggin my fee on this sooo much it is kinda sad, might do more if i have someone going through the same things.

toag