Rigol DS1052E replacement trigger potentiometer - Page 1
Forum section: electronics / repair

author: Bryan
author_rank: Frequent Contributor
timestamp: January 05, 2015, 09:52:00 am
content: All:Dropped a large flashlight while working on a project and it hit the trigger pot on my Rigol and snapped the shaft off. Does anyone know where I can source a direct replacement or an equivalent. Here is a picture (not mine but off the net) of what I need.

author: elerepair
author_rank: Newbie
timestamp: January 05, 2015, 12:44:28 pm
content: google is your friend.https://www.google.is/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#safe=off&q=rigol%20replacement%20potentiometerfirst hit.

author: Bryan
author_rank: Frequent Contributor
timestamp: January 05, 2015, 08:59:40 pm
content: Not seeing it. For what a Rigol crock pot?.Do you have a link to the page you could share.

author: Noize
author_rank: Regular Contributor
timestamp: January 05, 2015, 09:20:46 pm
content: Quote from: Bryan onTodayat 08:59:40 PMThis could work.http://www.digikey.com/product-search/en?WT.z_header=search_go&lang=en&site=us&keywords=987-1195-ND&x=0&y=0

author: Noize
author_rank: Regular Contributor
timestamp: January 05, 2015, 09:26:15 pm
content: Sorry, this one is more suitable having 12 pulses per revolutionhttp://www.digikey.com/product-search/en?WT.z_header=search_go&lang=en&site=us&keywords=987-1195-ND&x=0&y=0editdatasheethttp://www.bitechnologies.com/pdfs/en12.pdfedit againsorry the shaft looks a bit long on that one maybe someone will chime in with the exact one because my trigger knob broke today

author: Len
author_rank: Frequent Contributor
timestamp: January 06, 2015, 04:53:32 am
content: Quote from: elerepair on January 05, 2015, 12:44:28 pmFirst hit that I get is this very thread.

author: Bryan
author_rank: Frequent Contributor
timestamp: January 06, 2015, 07:03:02 am
content: Quote from: Noize on January 05, 2015, 09:26:15 pmI haven't taken the scope apart yet, but I am pretty sure the trigger pot is NOT a encoder. the Channel 1 and 2 horizontals are

author: Noize
author_rank: Regular Contributor
timestamp: January 06, 2015, 09:01:00 am
content: Quote

author: Bryan
author_rank: Frequent Contributor
timestamp: January 06, 2015, 03:52:31 pm
content: Thanks for that, very helpful.

author: Bryan
author_rank: Frequent Contributor
timestamp: January 18, 2015, 10:08:52 am
content: Well I got around to taking the damaged encoder off the board and took it apart. From looking at the guts does anyone know how many pulses. The schematic seems to suggest 24 for the trigger control. The mfg is ALPS (no part number), but can't seem to find a replacement on their website.

author: SeanB
author_rank: Super Contributor
timestamp: January 18, 2015, 11:21:13 am
content: It is a 24 position one, though as it is a non numbered control you could use any number of position one with only the number of turns per hundred clicks being different. You can use a 16 or 12 position there if it fits.

author: Bryan
author_rank: Frequent Contributor
timestamp: January 18, 2015, 11:32:10 am
content: How do you tell it is a 24 position from looking at the picture. Has me stumped trying to figure out 24. But yes, you are probably right, don't think it's just that critical the trigger level will just move slower or faster depending on the encoder positions I suppose.

author: SeanB
author_rank: Super Contributor
timestamp: January 18, 2015, 12:06:16 pm
content: Simple, it uses a single ring and 3 slider contact positions to provide the pulses. As it rotates the slider touches first the one set of segments, then the other, to the common solid section, to give the direction and clock ( or quadrature position) pulses. As it runs out of track the sliders swap on the common segment. Look at half the ring and you get 12 positions available, thus the 24 pulses per rotation, or look at there being 8 positions per third of a turn of the wiper.

author: tan98010
author_rank: Contributor
timestamp: January 18, 2015, 12:53:17 pm
content: i replace my rigol ds1102ca and ds2202 knob with this onehttp://au.element14.com/alps/ec12e1224402/encoder-vertical-12-det-12ppr-sw/dp/1520810and its work.

author: Bryan
author_rank: Frequent Contributor
timestamp: January 18, 2015, 07:03:06 pm
content: Looks like I have sound something very close if not identical. 24 pulses with a switch. If not I am sure I can take apart and use the shaft.http://canada.newark.com/alps/ec12e2424407/encoder-incremental-5vdc/dp/74M1068

author: tautech
author_rank: Super Contributor
timestamp: January 18, 2015, 07:13:19 pm
content: If the Rigol has a "set to 50%" feature on the trigger, you will need the switch.