# Wiring PWM spindle AMB on jackpot controller

Hi everyone ! I recently build a lowrider 3 CNC with jackpot controller board. I am complete novice and I would have some advices about how to wire a PWM spindle on jackpot controller. I want to connect an AMB 1400 fme di spindle to the controller. Specifications are the following :

Here is what I intend to do : I’ll put green wire (0-10V DC for speed control) on one of the 2 VMOT MOSFETS - Brown wire (10-26V DC for power supply) on “plus” of the power supply inputs (which is a 24V by the way) - White wire (OV GND) on “minus” of the power supply. Here is an image of the wiring :

Next I’ll load a new config.yaml on the board adding pwm speedmap according to the AMB specs :

I computed speed map like this :

My powersupply is 24V so 100% of the MOSFET voltage is 24V.
The spindle speed control goes from 0V to 10V so :

• to get 0.5V => (100%*0.5V)/24V = 2.083% of MOSFET max voltage
• to get 1V => (100%*1V)/24V = 4.167% of MOSFET max voltage
• to get 9V => (100%*9V)/24V = 37.500% of MOSFET max voltage
• to get 10V => (100%*10V)/24V = 41.667% of MOSFET max voltage
So speed map would be :
speed_map: 0=0.000% 3500=0.000% 3500=2.083% 3500=4.167% 25000=37.500% 25000=41.667%

Is there something wrong in my intentions ??

Simon

I don’t think that will work, but Bart makes a 0-10v Spindle module that works on the Jackpot

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If the Jackpot can control a spindle, it can control the AMB, can’t it? I am using exactly the one you want to use (AMB 1400 FME DI) albeit with another board. It is important that the 10V can be hit pretty exactly do have the correct speed and I do not see the little screw to change the voltage on the Jackpot. So maybe not possible after all?
The module @srcnet linked has got exactly what you need, also the little screw for the voltage (R2, right side). So maybe get that module if it fits on the Jackpot and you should be golden.

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We’d need to create the correct config section in config.yaml. Jackpot has only a single expansion connector compared to Bart’s 6-pack board (which has 2), so we might need to do a bit of experimentation to get the config correct.

Also check if your spindle has an RS-485 mode instead of just 0-10V. I’d think the RS-485 interface would be preferable, but that’s a different module than the 0-10V one.

Can you explain how this would wire in? I purchased a Daedalus 500W brushless spindle with a 0-10v PWM requirement and I’m facing the same issue and RS-485 mode is not indicated as available.

You would need one of Bart’s 0-10V modules, which you’d install on the jackpot expansion connector. Then you’d need to hok up the 0-10V signal and GND to the box shown in your diagram.

Then you need to edit config.yaml to work for your setup.