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PWM input if I remember correctly when turned off stops the motor. So you just need another output pin connected to "F/R" to control direction.

edit:
Checked again today, and yes PWM works fine...

PWM setting I think I just applied 0-5V signal from PWM to Gnd (CN6 in your pic). LCD was connected and reported current speed. PWM is easy to send from the PC, and will work fine with a normal...

http://www.cnczone.com/forums/showthread.php?t=14867

no clue, probably a few k

YouTube- HSMWorks Workflow CAM Software

ah, I suspected that could be the case. The software in this cheap one is not nearly as good.

nice, thanks for measuring

I don't think so.


Semi ot: if anyone buys the Otter 55A ESC, it is amazing but the design is flawed. Both regulators do not have enough output capacitance, on mine one was oscillating, the other...

Teknic sst-1500-acx, its one of their older drives.
12A, 75V supply, step/dir, designed for 48V brush/brushless servos.

The lowest winding resistance that can be entered is 0.01 ohm, this motor...

Disadvantage of the ESC is it doesn't know how much current is being drawn, which will help protect the motor and drive.
Although, the ESC does know when its completely stalled and seems to stop...

Good news is that the drive can rotate the motor:

Voltage - maximum rpm - current

Teknic sst-1500
24V - 7,500 rpm - 4.4A
30V - 9,230 rpm - 5.4A
40V - error at few krpm (bus current exceeded)...

If you add an encoder to it, I don't see why it couldn't be powered with an industrial type drive. You'd be looking at lower voltage units though.
I may give it a shot with a teknic drive in a few...

That post was made today, so no progress since then. The pcb you see I have a few more of but they are not assembled, and I'd like to do some more testing.


yup, you are correct. It is a great...

It looks like your chip is capable, it appears to have 19-bit(?) hardware PWM. But its not a requirement, you can also use a 8/16-bit timer to generate an interrupt. Set pin high, increment interrupt...

I received a cheapo "Otter" ESC, which has a governor mode. Just from simple observation this feature appears to be useless for our purposes :P.
Motor is a little noisier than I would like, not...

With 1ms timing interval, 25kHz kernel should give 25 discrete speeds. Take off a few due to deadbands in the ESC and you are not left with much. 50 or 100kHz kernel would be required to make decent...

Not a bad idea, must be a monster mill though. I just have a single unit for spindle drive.
Will the GD run hall-less? Would make adding an encoder a little easier.

Here are some pics of the...

I have the 1100W motor + controller running currently on the bench, working ok.

PCB is very well designed. Output module is highly rated at 20A 600V. dsPIC is used for main controller. Another PIC...

The cutting portion is larger because you don't want the shaft to rub.

If its an odd number of flutes, you could use something like this:...

Some tips here that might be of use: http://www.practicalmachinist.com/vb/general-archive/turning-timing-pulley-75422/

Looks good though

Nice, I ordered the same smaller motor and a cheap esc with governor to see if its of any use. Although if its controlled via the PC, its easy enough to run a spindle encoder for feedback.



...

Whats your Velocity cap in Config > Motor tuning set to?

Assuming its aluminum or plastic, could try double sided tape.

You would need a spoil board of some suitably smooth material underneath (plastic, alu, etc.).
If you zero your final depth just...

Here is a list of full reverse ESC's I found:

Hobby King Brushless Car ESC 100A - $38
- 17V
- some complaints of cutting out in the comments
- appears to have a simple reversing mode (if the...

Yes, your steps per inch should be the same as everyone else with that setup. Unless you want to compensate for screw error, but I wouldn't bother at this point.

1.8deg per step, 360deg per rev,...

Resell value on gecko equipment is so high its likely not worth it.
You'd be left with an empty shell, and save maybe $100. Instead of just reselling it for >$100.

This is probably the correct forum: http://www.cnczone.com/forums/forumdisplay.php?f=74

Or craigslist for someone local.

Speed control in one direction should be straightforward. We would take the spindle PWM signal from mach3/EMC, feed it into a microcontroller, and output the standard 1-2ms ESC input signal.

For...

For reference, here is probably the cheapest UK one you found:
http://www.rdgtools.co.uk/acatalog/Machine_Test_bars.html $55 shipped

Looks like an amazing value, price is almost on par after all of the accessories. Problem is its a 650lb machine... :) I'll give it some thought though thanks


Nice, thank you.

I guess the one...