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Eastern Iowa | When using an Autopliot system on a tractor, is it manditory that a Trimble or Ag Leader GPS receiver be used? We are currently using a Trimble 252, NavII controller, Trimble valve block, and an Insight, running on the Omnistar correction signal. My question is, can you use any RTK enabled GPS receiver to feed your correction signal into the NavII or does it have to be brand specific? I guess more specifically I am asking, is the NavII looking for a specific data protocal (TSIP, RTCM, CMR, NMEA....) outputted only by a Trimble or Ag Leader GPS or is it open to different protocalls?
Edited by bigfarmerdave 12/19/2007 21:38
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Nebraska | As far as I know the GPS would have ability for TSIP (trimble standard). then it should work. |
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Near Intersection of I-35 & I-90 Southern Mn. | I am using virtually the same equipment as you mention except that I am using a Trimble 332 instead of the 252.
The Nav II will be expecting the GPS information to be TSIP (Trimble Standard Interface Protocol). Most Trimble products have the ability to ouput in TSIP or other standards (NEMA, etc.) I am not aware of any other brands of GPS that have the capability to output information as TSIP.
For this reason, I believe we are pretty well stuck with using a Trimble receiver or one of the receivers made by Trimble that are packaged under other names such as Ag Leader.
The flow of GPS in our systems goes from the GPS receiver into the Nav II controller. The Nav II controller is connected to the display/input device (Insight in our cases). The Nav II and the Insight communicate back and forth. The GPS that the Insight gets has already been processed/passed through the Nav II. The other port on the GPS is available for other uses and could be configured in a competely different way such as NEMA.
Just this week I considered rearranging my other autopilot tractor by trading in the EZ-Guide 500 that is in that tractor towards a used Insight. This would mean that the used Insight would become the display/input device for that tractor. I would lose the GPS that is built into the EZ-Guide 500. This means I would need a GPS source in that tractor. I have a loose Phoenix receiver that operates fine under WAAS so I considered using it in this scenario. Then I remembered that the Phoenix cannot output TSIP to the Nav II so that GPS source is not acceptable. That plus the fact that I would need to get the autopilot unlock for the used Insight caused me reconsider and leave things the way that they are.
The reason I considered the change is that I much prefer using the Insight with the autopilot in the 8120 over the EZ-Guide 500 setup in the 8310. The EZ-Guide 500 when used with the autopilot works OK but I prefer the Insight.
Edited by tedbear 12/20/2007 11:00
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| Our system uses ms750, 214s and a 252. They are using cmr+. I know of several other companies whose product outputs cmr+. I haven't tried it but don't know why they would not work. |
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West Central, IA | Is anyone out there using the 442 or 443 receiver from Trimble yet? Can you get them? What's the main advantage over the 252 or 332? |
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| As I understand, the main advantage will be seen in the y axis (vertical axis). A dealer told me that it was geared more towards farmers that leveled. It also has the capability of Glonass, which you will have to ask yourself if (in your area) the lost signal time will pay for the Glonass addition. Some one else might be able to expand on that. |
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| The Glonass capabillity helps with the all around GPS constallation that your reciver is viewing at any one givin time. That in turn allows the reciver to pick the better satts for position and lowers the DOP's. Lower DOP's make for more accuracy, wether it be horizontal or vertical accuracy that you are looking for.
clyde, your base and 252 talk in CMR's, but your 252 communicates with the NAV in TSIP(if you are running auto-pilot). |
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| I put NH3 on with RTK ez steer and a 500 lightbar last fall. Purchased a used 1998 JD 8400 FWD this winter, and had Trimble autopilot and an Insight in to record varieties, later plan to move INsight to combine for yield monitor.
I've got to determine why, in spite of dealer calibrating Insight Autopilot why I am much happier with way ezsteer performed last fall. It made numerous small wheel corrections and stayed on line very well. Insight autopilot is doing much more S curving as it tries to stay on line. It reminds me of a WAAS setup instead of RTK right now. I'm trying to change aggressiveness number, with slower being a little better so far. This is at 4-6 mile an hour. Is calibration needing redone, or any other operator options I can try. I have temporarily downgraded my steering till I can get this figured out. 5.0 insight version and I'm not sure of autopilot version or antennae version. Thanks. |
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Question about Trimble Autopilot
