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Jerry Trantow
I played around with lots of control systems and have settled on running linuxCNC on a PC with ethernet Mesa cards. Parallel ports are slightly cheaper but run out of bandwidth for encoders. I have a Mesa 7i92 and a 7i96 and I think the 7i96 might be a better fit for you. (you shouldn't need the chinesium break out board) If you go the linuxCNC/Mesa route it's really convenient to have one network connection for the Mesa card and another network connection for internet and other networking tasks. (like sharing your CAM files) I used a raspberry pi 4 with the?mesa card for a little while, then a dumpster diving friend delivered 18 used medical computers and I switched all my machines to touch screen PCs with dual network connections. (if you are interested, I still have four computer systems available?on ebay. search "linuxcnc touchscreen") I have been very happy with some cheap closed loop steppers on my Rockwell vertical mill. My 9x20 uses a Gecko 540?and I just added linear scales. Going forward, I think I will go with closed loop steppers or try servos. I have settled on the Meanwell RSP-1000-48 as my goto 1000W power supply. I have purchased several from ebay?for ~$100. They are quiet rock solid power supplies. WIth LinuxCNC you could use either open or closed loop steppers AND use the build in DRO scales for position feedback. (This would require adding a Mesa 7i85s for the extra encoder channels.) There is good support in LinuxCNC for this. I think you will save a lot of projects by integrating your existing DROs into the control system. Basically, it will stop if the DRO doesn't match what the gcode?says. With my mill, I started using linuxCNC as a simple DRO.display without any motor control for?a?couple?months. Then added motors. Next up is adding a spindle encoder for rigid tapping. I like the fact that closed loop steppers provide an alarm signal if they can't achieve the desired position. My lathe and router started out with motors couplers. My mill uses a timing belt for the z and recently I changed my lathe x to a timing belt. 3D printed timing gears work fantastic if you have access to a printer. Belts give you a lot of options for motor placement and you can gear up/down. On the CAD side, Fusion360 has a learning curve but there are a lot of youtube how to videos. Rockwell vertical mill - LinuxCNC touchscreen PC,?closed loop steppers, linear encoders XYZ, VFD for spindle. Logitech jog. Jet 920 9x20 lathe - LinuxCNC touchscreen PC, open loop steppers with Gecko 540, linear encoders XZ and 260 pulses per rev spindle encoder, VFD for spindle. z touch off, Logitech jog. Homebuilt Aluminum extrusion router - LinuxCNC touchscreen PC, open?
loop steppers with Gecko 540, z touchoff?Logitech jog. Homebuilt Aluminum extrusion 3D printer running Marlin. On Sat, Jul 17, 2021 at 4:11 PM CLevinski <clevinski@...> wrote: Hello, All, |
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