New Rebuild on Sherline Chucker Lathe & New build on 5400 mill

[BillB]

So update on this, just ordered a replacement for the KBIC which is a KBIC240D that designates its dual voltage. They were cool and will pay to ship it back which they did not have to do because it was their dealer rep who gave me the wrong link.

I actually wish I would have known about that before all this, I mean before I built that lathe control I would have gone that way for both. I just placed the order before reading your post above Marty. I think I'm gonna just stick with what I have, replace the KBIC, and be done with it I'm kind of tired of redoing stuff and need to be done with the built portion of this project. With both these boards, it was a proven working system before it burned out. + I have a kitchen remodel I need to get to for the home. Need to be done with CNC builds.

As for the motor, took it to work Dillan helped me test it on the DC power supply and it runs, but we did not crank it up to the high speed. It measures between 4.9-5.2 resistance on 200 and .005 on 2K.

[BillB]

It is. On the motor and speed control tab: "Output horsepower: .06 KW (60 W) at 10 oz. in. / 6100 rpm"

You say that but what is the formula? How does the above tell me the HP? That's why I asked. Im looking it up and it says HP for motor = volts X amps and I come up with 157.5? Using 90V X 1.75 amps =157.5 ? OR 90V X .85 amps = 76.5. IS this correct? and still how does this translate to somewhere in the range of a 1/2-3/4 HP motor?

From Shiriline Motor specs.
Duty rating: Continuous–10 oz. in. at 6100 rpm, .85 amperes; Intermittent–30 oz. in. at 5500 rpm, 1.75 amperes (5 minutes on / 15 minutes off)
Output horsepower: .06 KW (60 W) at 10 oz. in. / 6100 rpm
AC voltage (input): Normally 115 VAC, 60 Hz, Single Phase to a rectifier (Sherline electronic speed control converts any input from 100 VAC to 240 VAC, 50-60 Hz.)
DC voltage: 90V DC to motor (60 Hz)

[tblough]

Why did you think it was acceptable to ignore the rest of the equation? You successfully calculated watts which is volts x amps. Now divide by 745.6998 watts/HP to get an approximation if you want to ignore power factor and efficiency.

[BillB]

Why did you think it was acceptable to ignore the rest of the equation? You successfully calculated watts which is volts x amps. Now divide by 745.6998 watts/HP to get an approximation if you want to ignore power factor and efficiency.

LOL right I actually was writing this at work, got sidetracked, I was going to ask you guys about those additional factors, LOL But hit send ayways. To many things going on. So what are the other factors EFF and power factor? was not sure what they are?

[tblough]

Google has some pretty good explanations.

[BillB]

Hey All,

Trying to get my Sherline mill finished but am still plagued with the spindle problem. Will not spin up. It was working at one point but then seemed like the KBIC-240D went bad so I just installed a brand new one. Maybe that was not the issue. ? Ive confirmed the motor is fine by hooking up to a DC power supply and it runs. Im now getting no voltage coming out of the KBSI-240D, as per Marty's test below. When hooking up the multimeter to leads 9 & 10 Im not getting any voltage coming out no matter how much I try and adjust the min and max trip pot on the KBSI-240D board, this is also a new board.

The strange thing is back a few weeks ago I WAS getting voltage coming out of Acorn into KBSI-240D but now nothing, The spindle was just not working so I replaced the KBIC-240D speed control.

Im SO frustrated with this because this spindle was working, but as we were trying to dial in the RPMs something went wrong from one day to the next and I have had no spindle working since then.

So the BIG question is, IS it possible Acorn is the issue? could the spindle output just go bad on the board? I dont get this ?????? Been trying to resolve this for weeks now.

Sorry will post a report at home.



(Testing Steps From Marty from page 19 of my build thread here)
Do this,
Disconnect the KBSI-240 from the KBIC Speed control by disconnecting the KBIC from terminals 9 and 10.
Go into the Wizard, set the max spindle RPM to 10,000 (every 1,000rpm will equal about 1VDC)
Power up the KBSI-240D
Put your meter on Terminals 9(-) and 10(+)

Reset CNC12 to put it in the ready state.
Home the machine
Go into MDI
Call up M5
That should be very close to 0V
Check the meter, what does it read?
(Adjust the min trim pot on KBSI-240D to get it close to 0V)

Call up M3S10000, which should be about 10V
Check the meter, what does it read?
Adjust the KBSI-240D MAX Trim pot until you get it as close to 10VDC as you can.

Now call up M3 S5000, which should be about 5V
Check the meter, what does it read?
It should be fairly close to 5V or so

[tblough]

Back up one step further. Disconnect the KBSI-240D from the Acorn analog output, and connect your voltmeter to the Acorn analog output terminals. Be sure it is set to read DC voltage, not AC.

Go into the Wizard, set the max spindle RPM to 10,000 (every 1,000rpm will equal about 1VDC)
Reset CNC12 to put it in the ready state.
Home the machine
Go into MDI
Call up M5
That should be very close to 0V
Check the meter, what does it read?
Call up M3S10000, which should be about 10V
Check the meter, what does it read?

If you get close to 0V and 10V above, then the Acorn is working correctly.

[BillB]

Back up one step further. Disconnect the KBSI-240D from the Acorn analog output, and connect your voltmeter to the Acorn analog output terminals. Be sure it is set to read DC voltage, not AC.

Go into the Wizard, set the max spindle RPM to 10,000 (every 1,000rpm will equal about 1VDC)
Reset CNC12 to put it in the ready state.
Home the machine
Go into MDI
Call up M5
That should be very close to 0V
Check the meter, what does it read?
Call up M3S10000, which should be about 10V
Check the meter, what does it read?

If you get close to 0V and 10V above, then the Acorn is working correctly.

Tom, Thanks for pointing this out I did not think of it. Acorn is fine every increment I enter in MDI hit the exact voltage were looking for.

I think its time to call KB and get some help from them unless you guys have any other input. In regards to adjusting the pots I have literally turned the pot screws so many times out of frustration is it possible I have screwed something up on them? I know they are supposed to have a range but can't tell where it starts and ends since Im getting no voltage readings. Simler situation on the lathe at one point where the min pot screw was reading negative voltage, Played with it for days and finally realized that i kept turning the opposite way and eventually it started reading + voltage. I was "trying to do the same thing here with the mill but I could never get it to start reading anything +. Currently, it reads -.7 with sector on DCV 200 setting

Here is a report.