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+--- Thread: DC Interface Working on somethings and not others (/thread-35.html)
DC Interface Working on somethings and not others - Sach - 04-10-2023
Hi, I the DC interface was working well with a walkman. Following the LFOs signal. Then didnt anymore. I have tried it with the solenoid and it doesnt work but it does work with the motor. Please help. I particularly got this to mess with the speed of a tape machine.
RE: DC Interface Working on somethings and not others - Quolcat - 04-12-2023
Hii :)
Do you change the mode between PWM and Pulse when you change the motor?
With a solenoid you should use the Pulse mode.
If that changes nothing let us now to have a deeper look into that (hope is not the case :D )
RE: DC Interface Working on somethings and not others - willslliw - 06-12-2023
Hello-
I'm having this same issue. My DC motor works fine, but my solenoid is unresponsive. I've tested the solenoid with a wide range of different settings and the result is the same. I've also ordered two separate solenoids from Koma to test the functionality of the motors. I'm now going to try to make my own motor and see if this works. I've noticed that within Koma's FAQ section they suggest that any solenoid should work so long as it is under 9V and <500mA. Is this so? It seems like the solenoid that ships from Koma is 12VDC and 300ma. Would it make sense to use a lower voltage (lower than 12VDC) solenoid with the unit?
RE: DC Interface Working on somethings and not others - sethnotseff - 06-24-2025
Having the exact same issue. Help
RE: DC Interface Working on somethings and not others - sethnotseff - 06-28-2025
Same exact issues here. Has anyone got a response about these issues?
RE: DC Interface Working on somethings and not others - Jackieflipflop - 07-31-2025
Hello!
in the DC interface section,
the motor should work if:
-the switch is set to PWM
-you turn the intensity clockwise (rotation speed will increase)
the solenoid should work if:
-the switch in the DC INTERFACE section is set o PULSE
-you patch a cable in the CV/TRIG from the LFO OUT (Waveform in pulse/square mode).
-you turn the intensity clockwise (intensity of the solenoid travel will increase)
If this is not the case, then something is not functioning properly. In that case is better to reach the support.
JJ
RE: DC Interface Working on somethings and not others - WillardAguirre - 08-18-2025
(07-31-2025, 08:25 AM)Jackieflipflop Wrote: Hello!
in the DC interface section,
the motor should work if:
-the switch is set to PWM
-you turn the intensity clockwise (drift boss rotation speed will increase)
the solenoid should work if:
-the switch in the DC INTERFACE section is set o PULSE
-you patch a cable in the CV/TRIG from the LFO OUT (Waveform in pulse/square mode).
-you turn the intensity clockwise (intensity of the solenoid travel will increase)
If this is not the case, then something is not functioning properly. In that case is better to reach the support.
JJ
Thanks for your help!
RE: DC Interface Working on somethings and not others - markjackson - 09-17-2025
(04-10-2023, 01:17 PM)Sach Wrote: Hi, I the DC interface was working well with a walkman. Following the LFOs signal. Then didnt anymore. I have tried it with the solenoid and it doesnt work but it does work with the motor. Please help. I particularly got this to mess with the speed of a tape machine. block breaker
It sounds like you're having some interesting challenges with your DC interface! Since it worked well with the Walkman initially, it might be worth checking the connections and settings again. If the solenoid isn't responding but the motor is, there could be a compatibility issue or a power requirement mismatch with the solenoid. Have you tried using a multimeter to check the voltage and current output when connected to the solenoid? Also, make sure the LFO signal is still stable and within the required range for both devices. Good luck, and I hope you get it sorted out soon!
RE: DC Interface Working on somethings and not others - smithjohnsq - 10-10-2025
(06-12-2023, 06:16 PM)willslliw Wrote: Hello-
I'm having this same issue. My DC motor works fine, but my solenoid is unresponsive. I've tested the solenoid with a wide range of different settings and the result is the same. I've also ordered two separate solenoids from Koma to test the functionality of the motors. I'm now going to try to make my own motor and see if this works. I've noticed that within Koma's FAQ section they suggest that any solenoid should work so long as it is under 9V and <500mA. Is this so? It seems like the solenoid that ships from Koma is 12VDC and 300ma. Would it make sense to use a lower voltage (lower than 12VDC) solenoid with the unit?
It seems like using a lower voltage solenoid (like 9V or 5V) could work, but you might see reduced performance in terms of strength or speed compared to the 12VDC solenoid Koma provides. As long as the current draw is within the <500mA range, it should be fine. Just make sure your power supply can handle the load, and you’ll likely be good to go. Testing different solenoids is a smart move to get things running!