[pelo13]

Hello to all .
I am phasing a problem with my new 400 watt spindle that i can't resolve any advise it will be helpful.

I have bought the following spindle motor from ebay with now instructions at all of course ,i manage to make it work with mach3 and my CNC through the pin port No.16 were was free ,i can control the speed of the spindle , on and off function also works .. but the motor running slow to the maximum speed (14000RPM).
As i measure with my multimeter from the port no.16 i get maximum 2.5volt when the maximum speed placed on mach3 spindle control screen, but i thing that the PWM motor speed controller wants 12volts maximumto give the maximum speed on the spindle...

any ideas it would be appreciated.

[CS900]

have you tried changing the "steps per" setting in the motor tuning control? Is your max and min spindle speeds set in the pulley set-up? I assume you're not using a tach feeedback are you?

[pelo13]

Yes i have try to change the steps and pulley setups with any luck .. always the same results i get the spindle runs too slow, and no i have not using any tach feedback

[ger21]

Mach3's PWM output varies from 0-5V. If you're measuring it with a standard meter, it probably won't read the voltage correctly, as it's a pulsed signal.

If you really need a 12V PWM signal, then it's not going to work,

You might be able to use a board to convert the PWM to a steady voltage and connect it where the pot goes. If you connect the pot, what voltage is the pot sending at max rpm?

[mactec54]

pelo13

How fast did you expect it to run, most of these are just a regular DC brush motor, & are only good for 3,000 RPM to 12,000 RPM

The collet chuck is just mounted on a standard DC brush motor, these motors are not designed to be used as they are for a spindle

Spindle Motor:
Work voltage: 12-48VDC
Rotation speed: 3000-12000r/min
Power: 400W
Torque:500mN.m
Insulation resistance:>2Megohm
Dielectric strength:400V
Motor Length : 186mm
Diameter:52mm
Axis collet Length: 48mm
Diameter of Axis collect holder:16mm
Repeat accuracy: 0.01-0.03mm
ER11 collect: 3.175mm
Power supply Specification:
Input:AC110V/AC220V±10% 50/60Hz
Output: DC48V 10A
Adapter power: 480W
Dimension:L130mm * W98mm * H38mm
13pcs(13 size ) ER11 PRECISION SPRING COLLET set:
Gripping Range 0.5MM to 7MM (3/128" to 17/64")
Run-Out Tolerance 0.015MM (0.0006")
First Class 1065 Carbon Steel
Hardened & Precision Ground
Wide voltage PWM DC brush motor speed controller：
Applies to DC12-60V low voltage permanent magnet brushed DC motor
Operating Voltage: Wide Voltage (DC) DC12V-DC60V (Max 65V)
Control mode
A: Default potentiometer control (5K-100K),defaults 10K;
B: MACH3 -PWM speed control signal input, external PWM input requirements: level 3.5-12V VPP, frequency 1K-10KHZ, suitable for MACH3 spindle speed control.
4. Rated current: 10A, overload and short circuit protection current 12A. (Over-current cut output, overcurrent indicator flashes, the potential light is off, overcurrent lift).
5.soft-start function. Prevent excessive current caused by the motor and power damage (default 0 seconds soft start), 0-5 seconds adjustable.6.Control power: 12V120W, 24V240W, 36V360W, 48V480W, 60V600W7.Dimensions: Length 75mm * Width 75mm * high 42mm 8.Pulse width modulation range: 0% -100%

[pelo13]

How fast did you expect it to run, most of these are just a regular DC brush motor, & are only good for 3,000 RPM to 12,000 RPM

The collet chuck is just mounted on a standard DC brush motor, these motors are not designed to be used as they are for a spindle

yes i know that.. with the pot connected i get the right RPM's (3000-12000).. but when i control it from mach3 the speed is too match lower..

Mach3's PWM output varies from 0-5V. If you're measuring it with a standard meter, it probably won't read the voltage correctly, as it's a pulsed signal.

If you really need a 12V PWM signal, then it's not going to work,

You might be able to use a board to convert the PWM to a steady voltage and connect it where the pot goes. If you connect the pot, what voltage is the pot sending at max rpm?

I check out the voltage on the pot i get 0-5v on maximum speed .. and i think the only solution is that i get i board converter as you say , but i don't understand why they sell the MACH3 -PWM speed controller with set when isn't 'plug&play' .. or maybe we are missing something here..

[mactec54]

but i don't understand why they sell the MACH3 -PWM speed controller with set when isn't 'plug&play' .. or maybe we are missing something here..

They sell a lot of things that don't work as described, they also sell a lot of very good things as well, you have to carefully choose a good supplier as to what you buy, this is easier said than done,in most cases

Your problem seems to be what is coming out too your speed control, which is from Mach 3 through your Breakout board, try Mach 3 set in step/dir & measure the output from the Breakout board, you should have 0-5v You may have to do this through a different pin/output on your Breakout Board, if you are getting 0-5v, then it should only be a setting adjustment in Mach 3 to get the PWM to give you the 0-5v needed output, even try the pulley setting at 2

What Break out Board are you using

[pelo13]

What Break out Board are you using

I use this one

https://drive.google.com/file/d/0BwI...ew?usp=sharing


i use pin 16 right now but i will try another pin as you suggested