Maxifet Analog Old Driver

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25 Jun 2024 23:12 - 25 Jun 2024 23:21 #303794 by rbobey1989
Hello everyone, I'm going straight to the point hehe, I have in my possession a Maxifet AF series 60 10/20 driver and the respective motor that drives it, this is a DC driver and apparently the motor is connected in speed mode since it has a tachometer. It is connected to the driver, I would like to recover this driver but I can't find any datasheet on the internet, I have been reading some threads here in the forum about DC drivers and something very common is the analog +/- 10V data interface that the driver housing says. If this is the case, first I would like some advice on which control cards to use. I was thinking of using a 7i33TA. I imagine that this can be used with any card with a 50-pin control connector. If someone could point out one, preferably Ethernet, I don't know if there is one. Mesa card, with at least an analog output +/- 10V, I know that 7i96 has an analog output, I'm not sure if it's -10V and I think it is designed for spindle control, this output could be used to control one axis since I only need one axis
Anyway, if anyone has any information about this driver that they can provide and a combination of board cards to control it, thank you in advance, I leave a photo of the driver and a brief diagram of the pins that are used in the machine where it is installed, greetings   
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Last edit: 25 Jun 2024 23:21 by rbobey1989.

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25 Jun 2024 23:35 #303799 by tommylight
Mesa boards and combos that work for analog +-10V drives, all 25 pin ones
7i97T
7i92TM + 7i77 <<< notice the M, it can be directly plugged into 7i77
7i92TM + 7i83 + 7i85 <<< notice the M, it can be directly plugged into 7i85
7i96S + 7i83 + 7i85 <<< needs a DB25 to IDC26 cable very cheap at Mesa shop
7i76E + 7i83 + 7i85 <<< needs a DB25 to IDC26 cable very cheap at Mesa shop
There are also other boards, but the 7i96S combo can be easily found, the first two should be available as it was noted by PCW, might also be sold out.

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26 Jun 2024 21:37 #303854 by rbobey1989
Hello Tommy, thank you for your response, I have been looking at Eusurplus prices for the combinations that you mentioned, honestly it would be great to be able to use the 7i33TA board since in this I have four +/-10 analog channels and 4 encoder channels on the same board Although it would be great to be able to connect it to a board like the 7i96 since I could use the inputs and outputs directly without having to use another board for the I/O, I had even commented if it would be possible to use the analog output of the 7i96 to control a DC brushed servo since I only need one axis, if only one axis is a Double Miter Saw Machine where the only axis would be the length since the degrees of the heads are driven by pneumatic pistons with mechanical stops, so I would save a significant amount of money if I could use only a board like the 7i96, I await a response, greetings

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26 Jun 2024 22:37 #303857 by tommylight
Eusurplus has 7i80, two versions in stock, no 7i93 in stock
www.welectron.com/ has none of those or i could not find them, their search is a bit fuzzy.
Be aware there are 4 versions of 7i80 if you decide to get one, no idea what the differences are as i never used it.

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26 Jun 2024 23:09 - 26 Jun 2024 23:15 #303858 by PCW
Replied by PCW on topic Maxifet Analog Old Driver
It's possible to use a 7I33 and a 7I96 with a
cable adapter from 7I96 P1 to the 7I33

There's even thread on the forum about this:

forum.linuxcnc.org/10-advanced-configura...sa-7i96s-pwm-outputs

(got to the end)

Note that that is for a 7I96, not 7I96S but the same firmware can be made for the 7I96S

Using the 7I96S spindle interface for an analog servo is probably not worth the trouble for
a couple of reasons:

1. You need  a +10 and -10 supply (these are not common)
    This limit is because the absolute maximum voltage from
    SPINDLE- to SPINDLE+ is 20V

2. The spindle output only has about a 100Hz bandwidth which
    will make tuning/performance an issue


If you only need one encoder, a 7I96S+7I83 might be the most direct way
 
Last edit: 26 Jun 2024 23:15 by PCW.
The following user(s) said Thank You: rbobey1989

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