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Type: Posts; User: mechanicer

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    making money from your DIY cnc

    Everyone here are related with DIY cnc. I think it is an expensive hobby if you want to do STATE OF ART.

    Making money from your CNC is an asset.

    Can you make comments and give ideas in this way?
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    DIY recirculating ball linear bearing

    Are there anyone try to make linear ball bearing (like THK, star)?

    Maybe from aluminium.. Using the same recirculating ball metod.
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    Poll: tpi value is 5. Is it possible above 200 ipm...

    tpi value is 5.
    Is it possible above 200 ipm with 5 tpi with a stepper system.
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    Poll: Mt steppers torque can carry this weight. My...

    Mt steppers torque can carry this weight.
    My problem is, spindle torque is became inadequate while feed is above 80 ipm. I want fine cut even in high feeds
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    I think the critical point of the moving gantry...

    I think the critical point of the moving gantry is the moment on the rails. If it is fixed, it is easy to carry the moments occur due to the cutting forces. But it is moving, gantry rails must have...
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    Poll: My machine cut at 80 ipm and jog at 130 ipm. I...

    My machine cut at 80 ipm and jog at 130 ipm.

    I can cut at 110 ipm also, but spindle power is not enough. If I increase the feed, the chip thickness will be greater. It means more cutting energy....
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    As loaded step motor, I mean the load is cutting...

    As loaded step motor, I mean the load is cutting force. It means that a power dissipation occurs. (cutting energy)
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    Yes, it is true. It think for a bipolar chopper...

    Yes, it is true.
    It think for a bipolar chopper constant current driver, current remains same (high voltage power supply tries to ramp the current to the same level always). Driver can not sense...
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    step motor energy

    I want to ask a question about step motor energy.

    1) While a step motor is running at constant speed with no load, it will be hot. Because of the excess energy. Electrical energy transforms into...
  10. Thread: rail plugs

    by mechanicer
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    rail plugs

    I have a simple problem...

    In my router, i am using circulating ball bearings. While mounting 20mm rails on the aluminium extrusions, i had to use M6 bolts. But plastic plugs do not fit to the...
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    pneumatic valve control

    I am planning to control pneumatic solenoid valves in my fixture which hold the workpieces with PC.
    Operator opens and closes solenoids manually. If i can construct the system using role,...
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    Yes, in your system, if stall occurs at the...

    Yes, in your system, if stall occurs at the sensor signal transition, signal always reset counter. And PC will continue to send step signal to steppers. We can not predict in which position stall...
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    There will be two differentiators. On the motor...

    There will be two differentiators. On the motor side and on the step signal side.

    In my serial production, I always cut by the same program. It means that I know the min. feed value. So if...
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    I want to build it myself. I plan to mount the...

    I want to build it myself. I plan to mount the sensors on steppers.
    Output command will be sent to PC.
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    gar: There are limit switches on the end of...

    gar:

    There are limit switches on the end of the axes. But on the table of my router i use a special fixture made of aluminium and consists pneumatic cylinders which hold the several workpieces. If...
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    while step signals are coming to driver, but at...

    while step signals are coming to driver, but at that moment if no signal is coming from optical sensor (motor), it means there is a stall. I think there is no need to count anything.

    Am i right?
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    i really need a stall detection system. Roland...

    i really need a stall detection system. Roland router and many other professional routers have stall detection systems.

    Step motor system is cheap and easy to construct. But i think the main...
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    stall detection

    Hi,

    I want to make a stall detection system. How can it be?
    I suppose,
    It will sense the step commands coming from computer and signals from step motor (with optical sensor or etc.) that whether...
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    I will design and manufacture a belt spindle. It...

    I will design and manufacture a belt spindle. It will be continous duty and has a ER20 collet.
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    My production

    This is the photo of my serial production. I produce the backplate (wood) of the door handle in my home built 3 axis cnc router.
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    Spindle failure

    I use a 24.000 rpm 1600 Watt commercial router as spindle. My 3axis CNC router must work 8 hours in a day, cutting hardwood. But spindle always fails. Sometimes the bearings, sometimes brushes. I...
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