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the resistor colours are left to right brown gold green brown black.
can ask these resitors does it matter which way they are inserted into the board.
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On my board, the connector terminals that you have circled are marked as follows:
Min
Gnd
Mout
I believe that those terminals (the Min and Mout terminals, that is) on my board are connected to the on-board relay contacts, which are intended to be used to switch a spindle motor on and off.
Are those terminals marked differently on your board? If so, I can only guess at their function, but you would need to verify that by probing with a voltmeter and/or following the circuit board traces to determine what circuit elements they are actually connected to.
If I were to guess, it would be the following:
One of the problems with the board revision that I have is that the same power input terminal that is used to supply the typical 24-volt to 35-volt input voltage that is used to power the stepper motors, is also used to supply power to the 12-volt on-board regulator, which then supplies power to the on-board 5-volt regulator. The problem with that design is that both of those regulators end up dissipating quite a bit of power, which causes them to become extremely hot during operation. If the board has been redesigned, it is possible that there may be a jumper that you can set to indicate whether the power to the two regulators may be supplied by one or more external power sources, or else to handle the same power circuit arrangement that my board uses. Do you see a jumper block anywhere on the board that may be connected to those terminals?
An alternative possibility that I can think of is that those terminals could possibly be designed as power outputs (regulated 12 volts and unregulated 7 volts) that can be used by external accessories.
If your board did not come with any documentation to identify the intended purpose of those terminals, then you may have to do the probing on your own to determine what is going on. If you are unable to determine the function of those terminals by inspection (or by referring to documentation), then I would suggest turning on the normal power to the board as you have it wired (does the fan run when you do that?), and then probing those terminals with a multimeter, in order to measure the voltage from each terminal to ground, which, if found, would provide more information. However even with those voltages confirmed, it is still possible that there are jumpers which can be changed in order to turn those terminals into inputs rather than outputs.
One more question, not related to this issue:
Can you tell me the colors of the color bands on the resistors in your photo, in sequence from one end of a resistor to the other? I can't tell for sure by looking at the photo.
the resistor colours are left to right brown gold green brown black.
can ask these resitors does it matter which way they are inserted into the board.
No, it does not matter which way they are inserted into the board.Originally Posted by Snooper911
when you setup mach 3 to run with your table is there a part of the software where you set up the type and pitch of the thread of the table movement or what do you have to set for this.
That is discussed under the topic of "Motor Tuning" starting on page 5 of ftp://machsupport.com/Docs/Mach3%20Setup%20Tutorial.pdf
Here is what I figured out.
That misterious connector is the spindle motor-out/ground/ground/motor-in.
So you would take your spindle drive 2 wires from it's controler card and bring it over to the blue board; Motor-in/ground. Then you take two wires and go from MOTOR-OUT/Ground to the spindle. Bingo You now have spindle control via MAX3.
The catch is making sure the relay is able to accept the power rating for the spindle motor. Or you can cascade from the blue board relay to a second, higher powered relay to your spindle.
===
I just got my 4 axis, un-modified blue board working with my 3 Keling motors running off a 12V/3A power supply.
Had to play around with settings of everything but low and behold it ran the Roadrunner demo start to finish with out a glitch. It is not fast but man it is plenty strong. Funny to see the motor dancing around on the table. No strange noises.
Ran this off an IBM Thinkpad pluged into a docking station. Went into the BIOS and set the parrallel port to the good old standard setting, not ECP, not EPP, not by-directional.
Dropped the switches 1 and 2 on blue board to off-off 25% HOLD CURRENT because the motors would draw more current than was availlable from my little home built power supply. That permitted ALL three motors to run. At 25% I an un-able to turn the locked up stepper motor by hand, I can't even stop it during Roadrunner demo.
I know I am not out of the woods yet. But with what I have read in this forum, and all the odds and ends I piece together I may get the CNC working eventually. Quite the learning curve. but it works fine at this time.
Marc N Fournier
OK, it's interesting that those terminals may be marked differently from the ones on my board, but they perform the same function.
Any one know how to wire the spindle control on the TB6560 with the Little Machine Shop SC2 cnc spindle control upgrade kit? or do I even need it? This is my first converson I have The blue Board with MIN GND MOUT.
While I don't have direct experience with that spindle control board, I examined the circuit diagrams in the manual at http://littlemachineshop.com/instruc...UpgradeKit.pdf, and based on that, it appears to me that you can not drive the spindle control kit from the TB6560 board (at least, not without providing additional control circuitry).
The TB6560 board provides a single relay that can be used to switch spindle power on or off.
However the spindle control kit requires two relays (one for spindle start/stop and the other for spindle forward/reverse). In addition, the spindle control kit requires a variable voltage from 0 to 10 volts that can be set by the CNC motion control (such as the Mach3 software) in order to set the spindle speed.
The TB6560 board only has one relay, so a second relay would be needed in addition to the onboard one. Also, the TB6560 board does not offer a variable voltage output, so you would need to add circuitry to handle that function as well.
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