RELS Progress #RELS
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Hello, All,
I have been busy pushing to get my RELS system up and running.? The mods to the lathe are all done.? As to the electronics, I have finished the power supply and joystick modules, and am working on the control module now.? See photos.? Topmost display in the control module is a tachometer; I didn't realize it was so large when I ordered it! The blue, plastic "cap" on the top of the power supply module is a 3D-printed exhaust port.? A 120 mm fan is mounted in the bottom of the module, and acts to blow air into the module through a filter.? (The module will be mounted suspended off the floor, so there will be ample space for it to draw air.)? This creates positive pressure inside the power supply, and should help prevent the entry of dirt, dust and chips.? The exhaust port makes the air take a 180 degree turn before exiting, in order to further minimize dirt, dust and chips from entering the module.? This module itself contains the stepper power supply (36 volts/11 amps), two stepper drivers, a voltage "buck" converter to provide 12 volts for the other modules and the fan, the fan itself, and a circuit breaker and a power switch.? I happened to have the very large housing; it originally contained a HUGE Israeli linear power supply from 1950-something, which I stripped out to reuse the housing. And, before anyone comments, "yes", the power supply design is definitely overkill! The joystick module housing is 3D-printed; the design is John Lindo's, I just rearranged the components to suit my needs. ?? -- Regards, Charlie New Jersey, USA MURPHY'S CONSTANT:?Matter will be damaged in direct proportion to its value. |
¿ªÔÆÌåÓýNice idea for the ventilator. ? Still need to make the harm and support for the monitor/keyboard/mouse since the cabinet sits out of the way of chips and coolant. ? And you're not the only one with overkill on power supply cabinets.? ? The HV_Supply photo shows the 105VDC power supply for the XY and Harmonic Drive. The 60VDC supply is on the back and I can't get at it to make a photo at the moment. ? The ControlSide photo shows:from top left to right, two HP_UHU drives (105VDC) for the X/Y axis, then another plate with a Gecko (60VDC) for the Knee Stepper motor (and a 24V to 16V regulator for the HP_UHU) ?and finally the STMBL AC Servo Drive for the 4th axis harmonic drive. ? Below that a DIN rail with a module I made to do level conversion of step/dir/enable/Fault to/from RS-422 for the STMBL drive along with DIN rail terminals.? On the right of that is a 24VDC switching power supply and at the bottom the PMDX-126 Break out Board.? ? The small 3D printed box holds another custom board that just translates a DB-25 from the AC Servo into the two RJ-45 cables for the STMBL drive. ? What's not shown is a second mounting board that holds either a SmoothStepper or MESA 7i92H.? At the moment I have the PC parallel port cable connected directly so I have only one parallel port and limited step rates. ?With the Ethernet MESA 7i92H I get full 180 ipm on the X axis and can do all sorts of things to the PC without any motion control issues.? Same with the USB Smooth Stepper that I borrow from my CNC Router.? ? I've not yet decided if I will finalize on MACH3 or LinuxCNC but all I have to do is select which OS to run from the dual boot.? No cables to change unless I'm using MESA or Smooth Stepper. ? And I've 3D printed caps over the backs of the DC Servo CUI encoders. ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of CLevinski
Sent: November-23-19 3:24 AM To: [email protected] Subject: [digitalhobbyist] RELS Progress #RELS ? Hello, All, |
