How do I pick a pin? October 31, 2014 11:40AM |
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Re: How do I pick a pin? October 31, 2014 02:02PM |
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Re: How do I pick a pin? October 31, 2014 02:15PM |
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Re: How do I pick a pin? October 31, 2014 02:28PM |
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Quote
Andrew Smith
If you look at the Mega, then you'll see that pins 2 through 13 are marked PWM. Checking the RAMPS pinout, 8,9 and 10 are used for the mosfets on the RAMPS, 2 and 3 are used by the X endstops though most printers don't use X max, so pin 2 may be free on your machine. Also, 44,45 and 46 are also PWM capable, which isn't reflected on the silkscreen. So, any of 2,4,5,6,7,11,12,13,44,45 and 46.
Re: How do I pick a pin? October 31, 2014 03:48PM |
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Re: How do I pick a pin? November 03, 2014 01:47PM |
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Re: How do I pick a pin? November 03, 2014 05:43PM |
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Re: How do I pick a pin? November 05, 2014 01:53AM |
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Re: How do I pick a pin? November 05, 2014 02:57AM |
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Re: How do I pick a pin? November 05, 2014 09:01AM |
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Quote
prashantdshinde
I have built a seven switch to work it on RAMPS1.4 with marlin...
but I dont know the connection to its connectors & the changes that need to be done in marlin code...
Re: How do I pick a pin? November 06, 2014 07:22AM |
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Re: How do I pick a pin? November 06, 2014 09:42AM |
Registered: 10 years ago Posts: 869 |
If you're using the always on +5V from AUX4, then it's working as it should. You need to use a switched unused pin in AUX4 along with M42 such as M42 P45 S255Quote
prashantdshinde
But when I connected the +12v from PSU I cannot control the ON/OFF of heatbed using the Pronterface
Your question is a bit ambiguous. Are you drawing the supply power for the Seven Switch from the D8 output connectors? Or are you using the D8 output as the switch that drives the Seven Switch's transistor's gate? If it's the former, then you can't draw more than 11 amps as that is what the polyfuse is rated for, and the connectors are also rated for about that. If it's the latter, I probably wouldn't use a drive connector as they are only officially rated at 6.5 amps but I'm guessing that's a conservative number. Use a connector that has a higher current rating if you're going to be drawing 11 amps or more continuously. The IRLB8743PBF transistor is rated for up to 78 amps but the traces likely will only support a fraction of that.Quote
If I connect the +12v of seven switch with the D8 of RAMPS, will I get more than 11AMPS out of it to heat the large heatbed without melting down the connectors??
Re: How do I pick a pin? November 06, 2014 12:36PM |
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Re: How do I pick a pin? November 06, 2014 01:34PM |
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Re: How do I pick a pin? November 13, 2014 03:05AM |
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Re: How do I pick a pin? August 17, 2016 01:36AM |
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Re: How do I pick a pin? November 07, 2020 09:37AM |
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