1980 Mori Seiki SL1 CNC Lathe to Mach3 Conversion

[dresda]

What is YAPSC?

[Hood]

Its a step/dir to analogue converter. You connect it to the Step/Dir from Mach and your encoders go to the YAPSC and then it will output the +-10v for your analogue amps.
Not 100% sure but think it comes in kit form, do a search on the CNC Zone and you should find info.
Hood

[JHChoppers]

drives would be +-10volts analogue so you would need a $1000.00 motion board

you can use YAPSC for this purpose. Cheap and reliable

Dear JH
is it possible ask about price for lathe ?
Approximate price What is it?

Amir

Not sure about YAPSC Products....  My guess its like a Pixie P100

The lathe as is cost $2500 USD, plus shipping and Mach3 Mods ...

JH

[JHChoppers]

I was able to find the Yaskawa AC Spindle Drive Documentation / Specs for the CIMR-MT7.5K.  The thing with most of these Spindle Drives are that they are 3 phase ( or are they…. )   The only thing that is 3 phase is the 6 diode bridge rectifier that converts the AC into DC for the internals of the unit to then recreate the 3 Phase AC for motor with adjustable frequency to control the speed.  If you connect single phase to the rectifier, then you are only using 4 of the diodes to generate the internal DC, this means you can use single phase on the AC Spindle Drive.  (this is my theory, I have not tried it)

My plan is to remove it and replace it with a NEW Drive that supports ModBus for the control and interface to Mach3

[JHChoppers]

Well….  I messed up.  My spindle is the CDMR-MR 7.5K not the CIMR-MT 7.5K, this means its not an AC Motor, it’s a monster DC motor.  This changes my entire plan, so for now, I will just break down the machine to the components that I plan on keeping for now….

[JHChoppers]

Here are some pics of the tear down....

[JHChoppers]

and a couple more ...

JH

[cnc-it]

Some nice gear there JH. All these motors and drives can be run from a Galil motion card. The Galil cards need an encoder feedback and I'm thinking with those drives you have might have a Tach feed to them from the motherboard to regulate the speed.

The encoders will probably go to the motherboard which handles the positioning and also creates a tach signal for the drives from the encoder feed?

Presume you are loosing the drives though as they are 3 phase...just pointing out if your motors don't have Tachos it might be a pia!

Looks like a Fanuc 5T control to me or maybe a Fanuc 6A?

The Fanuc AC analogue drives A06B-6050 types commutate the motor from the drive using the encoder position which is set to a certain angle with the motor poles. The encoder feed also goes to the Fanuc mother board which closes the position loop and handles the motion commands to give the drives the analogue signal they require.

On the Fanuc DC Yellow cap motor set up (similar to the Yasanak) the mother board converted the encoder signal to a velocity signal for the drives and also used it to close the loop..no tacho needed on the motors..works very well!

john

[dresda]

I would be looking at Galil or somebody else, I am still trying to get my DSPMC to work on red cap Fanuc, and on my other project with DC servo Dynamics the DSPMC works but the Acc/Dec in feed hold is pathetic @ .75ms. I have been asking for him to change it to 150ms or whatever for months. Also, I bought a really nice USB hand held pendant from Andrey in Russia, doesn't work, conflict with DSPMC plug-in.
Ray.