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Messages - DaOne

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General Mach Discussion / Mach 3 turn constant sfm?
« on: September 24, 2010, 02:28:05 AM »
Does mach 3 (lathe) have the ability to run a constant surface feet per minute? Basically as the tool moves closer to the center of the x axis  the spindle speed increases to compensate for the diameter to keep an even sfm? My Haas has this ability. Wondering if I can give my retrofit the same ability.

Manual won't come up for me - Can the drives be configurted for Step & Direction?

The newer Yaskawa Sigma series can be setup for Analog or Step&Direction. Omron sells a repackaged version of the Yaskawa drive that they call SmartStep that are stepper input only. I have also used Mitsubuishi drives that were step & Direction, but I preferred the Omron/Yaskawa drives. If you have the money one of these options might be easier to work with and you can get a local vendor to give you some assistance, depending on your level of electronics experience. It might cost a little more but you do buy access to their experience which might be what makes or breaks your project or your time frame for operation..

There are others out there - Automation Direct and others but I have zero experience with them.

I think the drives are speed control only. I would like to use the drives that are in there because they are already mounted and work great. Plenty of power. I think one of the analog to step/direction solutions is the way to go if the encoders will work with them.

The encoders on the servo motors are UTOPH-81AVF. I cant seem to locate much info on them. Anyone know what they are and if they are compatible with one of the converters mentioned?

I have a Bessie Rover 13 that has a old point to point control (NC400 Pro). I would like to convert it to Mach 3 so it will run standard G-code and do 3D carving. Right now its fitted with yaskawa cacr-sr02be12g-e servo packs. Anyone have any experience with driving them via Mach 3?

Here is the manuel for the drives...


General Mach Discussion / Re: Lathe multislot disk encoder?
« on: February 28, 2010, 07:58:15 PM »
Down to 1 rpm is fine. I figured with a single pulse that wouldn't be very accurate at 1 rpm.

General Mach Discussion / Lathe multislot disk encoder?
« on: February 28, 2010, 07:21:27 PM »
I am doing a lathe conversion that uses a sensor-less vector drive to control the speed of the spindle. I have a index pulse as well as a multi-slotted disk (60 slots per revolution). I know that index is needed for the start on threading however I want higher resolution on the rpm sense. I there any way to use both the index and the 60 slotted disk for higher resolution rpm at very low spindle speeds? Also is constant surface speed working in mach turn? Haven't tried it yet but figured I would ask if there are issues.

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